public virtual PerspectiveTransform createTransform(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft, ResultPoint alignmentPattern, int dimension)
{
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float dimMinusThree = (float) dimension - 3.5f;
float bottomRightX;
float bottomRightY;
float sourceBottomRightX;
float sourceBottomRightY;
if (alignmentPattern != null)
{
bottomRightX = alignmentPattern.X;
bottomRightY = alignmentPattern.Y;
sourceBottomRightX = sourceBottomRightY = dimMinusThree - 3.0f;
}
else
{
// Don't have an alignment pattern, just make up the bottom-right point
bottomRightX = (topRight.X - topLeft.X) + bottomLeft.X;
bottomRightY = (topRight.Y - topLeft.Y) + bottomLeft.Y;
sourceBottomRightX = sourceBottomRightY = dimMinusThree;
}
PerspectiveTransform transform = PerspectiveTransform.quadrilateralToQuadrilateral(3.5f, 3.5f, dimMinusThree, 3.5f, sourceBottomRightX, sourceBottomRightY, 3.5f, dimMinusThree, topLeft.X, topLeft.Y, topRight.X, topRight.Y, bottomRightX, bottomRightY, bottomLeft.X, bottomLeft.Y);
return transform;
}
/// <summary>
/// Initializes a new instance of the <see cref="AztecDetectorResult"/> class.
/// </summary>
/// <param name="bits">The bits.</param>
/// <param name="points">The points.</param>
/// <param name="compact">if set to <c>true</c> [compact].</param>
/// <param name="nbDatablocks">The nb datablocks.</param>
/// <param name="nbLayers">The nb layers.</param>
public AztecDetectorResult(BitMatrix bits,
ResultPoint[] points,
bool compact,
int nbDatablocks,
int nbLayers)
: base(bits, points)
{
Compact = compact;
NbDatablocks = nbDatablocks;
NbLayers = nbLayers;
}
/// <summary>
/// Apply the result points' order correction due to mirroring.
/// </summary>
/// <param name="points">Array of points to apply mirror correction to.</param>
internal void applyMirroredCorrection(ResultPoint[] points)
{
if (!mirrored || points == null || points.Length < 3)
{
return;
}
ResultPoint bottomLeft = points[0];
points[0] = points[2];
points[2] = bottomLeft;
// No need to 'fix' top-left and alignment pattern.
}
public Result(String text, sbyte[] rawBytes, ResultPoint[] resultPoints, BarcodeFormat format)
{
if (text == null && rawBytes == null)
{
throw new ArgumentException("Text and bytes are null");
}
this.text = text;
this.rawBytes = rawBytes;
this.resultPoints = resultPoints;
this.format = format;
resultMetadata = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="ZXing.PDF417.Internal.BoundingBox"/> class.
/// returns null if the corner points don't match up correctly
/// </summary>
/// <param name="image">The image.</param>
/// <param name="topLeft">The top left.</param>
/// <param name="bottomLeft">The bottom left.</param>
/// <param name="topRight">The top right.</param>
/// <param name="bottomRight">The bottom right.</param>
/// <returns></returns>
public static BoundingBox Create(BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint topRight,
ResultPoint bottomRight)
{
if ((topLeft == null && topRight == null) ||
(bottomLeft == null && bottomRight == null) ||
(topLeft != null && bottomLeft == null) ||
(topRight != null && bottomRight == null))
{
return null;
}
return new BoundingBox(image, topLeft, bottomLeft, topRight, bottomRight);
}
/**
* <p>Orders an array of three ResultPoints in an order [A,B,C] such that AB < AC and
* BC < AC and the angle between BC and BA is less than 180 degrees.
*/
public static void orderBestPatterns(ResultPoint[] patterns)
{
// Find distances between pattern centers
float zeroOneDistance = distance(patterns[0], patterns[1]);
float oneTwoDistance = distance(patterns[1], patterns[2]);
float zeroTwoDistance = distance(patterns[0], patterns[2]);
ResultPoint pointA, pointB, pointC;
// Assume one closest to other two is B; A and C will just be guesses at first
if (oneTwoDistance >= zeroOneDistance && oneTwoDistance >= zeroTwoDistance)
{
pointB = patterns[0];
pointA = patterns[1];
pointC = patterns[2];
}
else if (zeroTwoDistance >= oneTwoDistance && zeroTwoDistance >= zeroOneDistance)
{
pointB = patterns[1];
pointA = patterns[0];
pointC = patterns[2];
}
else
{
pointB = patterns[2];
pointA = patterns[0];
pointC = patterns[1];
}
// Use cross product to figure out whether A and C are correct or flipped.
// This asks whether BC x BA has a positive z component, which is the arrangement
// we want for A, B, C. If it's negative, then we've got it flipped around and
// should swap A and C.
if (crossProductZ(pointA, pointB, pointC) < 0.0f)
{
ResultPoint temp = pointA;
pointA = pointC;
pointC = temp;
}
patterns[0] = pointA;
patterns[1] = pointB;
patterns[2] = pointC;
}
/**
* Counts the number of black/white transitions between two points, using something like Bresenham's algorithm.
*/
private ResultPointsAndTransitions transitionsBetween(ResultPoint from, ResultPoint to)
{
// See QR Code Detector, sizeOfBlackWhiteBlackRun()
int fromX = (int)from.getX();
int fromY = (int)from.getY();
int toX = (int)to.getX();
int toY = (int)to.getY();
bool steep = Math.Abs(toY - fromY) > Math.Abs(toX - fromX);
if (steep)
{
int temp = fromX;
fromX = fromY;
fromY = temp;
temp = toX;
toX = toY;
toY = temp;
}
int dx = Math.Abs(toX - fromX);
int dy = Math.Abs(toY - fromY);
int error = -dx >> 1;
int ystep = fromY < toY ? 1 : -1;
int xstep = fromX < toX ? 1 : -1;
int transitions = 0;
bool inBlack = image.isBlack(steep ? fromY : fromX, steep ? fromX : fromY);
for (int x = fromX, y = fromY; x != toX; x += xstep)
{
bool isBlack = image.isBlack(steep ? y : x, steep ? x : y);
if (isBlack == !inBlack)
{
transitions++;
inBlack = isBlack;
}
error += dy;
if (error > 0)
{
y += ystep;
error -= dx;
}
}
return(new ResultPointsAndTransitions(from, to, transitions));
}
public static Individual ToIndividual(ResultPoint resultPoint)
{
var individual = new Individual();
individual.Evaluations.Add(new Evaluation {
Type = ObjectiveType.Cost, Score = resultPoint.Cost, Direction = Direction.Minimize
});
individual.Evaluations.Add(new Evaluation {
Type = ObjectiveType.Macro, Score = resultPoint.Macro, Direction = Direction.Minimize
});
individual.Evaluations.Add(new Evaluation {
Type = ObjectiveType.Preferences, Score = resultPoint.Preferences, Direction = Direction.Minimize
});
individual.Evaluations.Add(new Evaluation {
Type = ObjectiveType.PreparationTime, Score = resultPoint.PreparationTime, Direction = Direction.Minimize
});
return(individual);
}
/// <summary> <p>Estimates module size based on two finder patterns -- it uses
/// {@link #sizeOfBlackWhiteBlackRunBothWays(int, int, int, int)} to figure the
/// width of each, measuring along the axis between their centers.</p>
/// </summary>
private float calculateModuleSizeOneWay(ResultPoint pattern, ResultPoint otherPattern)
{
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float moduleSizeEst1 = sizeOfBlackWhiteBlackRunBothWays((int)pattern.X, (int)pattern.Y, (int)otherPattern.X, (int)otherPattern.Y);
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float moduleSizeEst2 = sizeOfBlackWhiteBlackRunBothWays((int)otherPattern.X, (int)otherPattern.Y, (int)pattern.X, (int)pattern.Y);
if (System.Single.IsNaN(moduleSizeEst1))
{
return(moduleSizeEst2 / 7.0f);
}
if (System.Single.IsNaN(moduleSizeEst2))
{
return(moduleSizeEst1 / 7.0f);
}
// Average them, and divide by 7 since we've counted the width of 3 black modules,
// and 1 white and 1 black module on either side. Ergo, divide sum by 14.
return((moduleSizeEst1 + moduleSizeEst2) / 14.0f);
}
/// <summary>
/// Calculates the minimum and maximum X & Y values based on the corner points.
/// </summary>
private void calculateMinMaxValues()
{
// Constructor ensures that either Left or Right is not null
if (TopLeft == null)
{
TopLeft = new ResultPoint(0, TopRight.Y);
BottomLeft = new ResultPoint(0, BottomRight.Y);
}
else if (TopRight == null)
{
TopRight = new ResultPoint(image.Width - 1, TopLeft.Y);
BottomRight = new ResultPoint(image.Width - 1, TopLeft.Y);
}
MinX = (int)Math.Min(TopLeft.X, BottomLeft.X);
MaxX = (int)Math.Max(TopRight.X, BottomRight.X);
MinY = (int)Math.Min(TopLeft.Y, TopRight.Y);
MaxY = (int)Math.Max(BottomLeft.Y, BottomRight.Y);
}
// Note that we don't try rotation without the try harder flag, even if rotation was supported.
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public com.google.zxing.Result decode(com.google.zxing.BinaryBitmap image, java.util.Map<com.google.zxing.DecodeHintType,?> hints) throws com.google.zxing.NotFoundException, com.google.zxing.FormatException
public virtual Result decode(BinaryBitmap image, IDictionary <DecodeHintType, object> hints)
{
try
{
return(doDecode(image, hints));
}
catch (NotFoundException nfe)
{
bool tryHarder = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER);
if (tryHarder && image.RotateSupported)
{
BinaryBitmap rotatedImage = image.rotateCounterClockwise();
Result result = doDecode(rotatedImage, hints);
// Record that we found it rotated 90 degrees CCW / 270 degrees CW
//JAVA TO C# CONVERTER TODO TASK: Java wildcard generics are not converted to .NET:
//ORIGINAL LINE: java.util.Map<com.google.zxing.ResultMetadataType,?> metadata = result.getResultMetadata();
IDictionary <ResultMetadataType, object> metadata = result.ResultMetadata;
int orientation = 270;
if (metadata != null && metadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
// But if we found it reversed in doDecode(), add in that result here:
orientation = (orientation + (int)metadata[ResultMetadataType.ORIENTATION]) % 360;
}
result.putMetadata(ResultMetadataType.ORIENTATION, orientation);
// Update result points
ResultPoint[] points = result.ResultPoints;
if (points != null)
{
int height = rotatedImage.Height;
for (int i = 0; i < points.Length; i++)
{
points[i] = new ResultPoint(height - points[i].Y - 1, points[i].X);
}
}
return(result);
}
else
{
throw nfe;
}
}
}
public static double HyperVolume(List <Individual> individuals, ResultPoint resultPoint = null)
{
var scores = new List <double>();
var scoreS = new StringBuilder();
foreach (var individual in individuals)
{
var currentIndividualScores = individual.Evaluations.Select(e => e.Score).ToList();
scores.AddRange(currentIndividualScores);
foreach (var currentIndividualScore in currentIndividualScores)
{
scoreS.Append(currentIndividualScore.ToString(CultureInfo.InvariantCulture) + ", ");
}
}
if (resultPoint != null)
{
//todo finish
}
var engine = REngine.GetInstance();
var data = engine.CreateNumericVector(scores.ToArray());
engine.SetSymbol("data", data);
engine.SetSymbol("individuals", engine.CreateNumericVector(new double[] { individuals.Count }));
engine.SetSymbol("criterions", engine.CreateNumericVector(new double[] { individuals.First().Evaluations.Count }));
RunScript("hv", engine);
var hv = engine.GetSymbol("dhv").AsNumeric();
var hvValue = hv.ToArray().First();
if (Math.Abs(hvValue) < 0.0001)
{
var letsTakeABreak = true;
}
return(hvValue);
}
/// <summary>
/// Samples a line
/// </summary>
/// <param name="p1">start point (inclusive)</param>
/// <param name="p2">end point (exclusive)</param>
/// <param name="size">number of bits</param>
/// <returns> the array of bits as an int (first bit is high-order bit of result)</returns>
private int sampleLine(ResultPoint p1, ResultPoint p2, int size)
{
int result = 0;
float d = distance(p1, p2);
float moduleSize = d / size;
float px = p1.X;
float py = p1.Y;
float dx = moduleSize * (p2.X - p1.X) / d;
float dy = moduleSize * (p2.Y - p1.Y) / d;
for (int i = 0; i < size; i++)
{
if (image[MathUtils.round(px + i * dx), MathUtils.round(py + i * dy)])
{
result |= 1 << (size - i - 1);
}
}
return(result);
}
/// <summary>
/// Expand the square represented by the corner points by pushing out equally in all directions
/// </summary>
/// <param name="cornerPoints">the corners of the square, which has the bull's eye at its center</param>
/// <param name="oldSide">the original length of the side of the square in the target bit matrix</param>
/// <param name="newSide">the new length of the size of the square in the target bit matrix</param>
/// <returns>the corners of the expanded square</returns>
private static ResultPoint[] expandSquare(ResultPoint[] cornerPoints, float oldSide, float newSide)
{
float ratio = newSide / (2 * oldSide);
float dx = cornerPoints[0].X - cornerPoints[2].X;
float dy = cornerPoints[0].Y - cornerPoints[2].Y;
float centerx = (cornerPoints[0].X + cornerPoints[2].X) / 2.0f;
float centery = (cornerPoints[0].Y + cornerPoints[2].Y) / 2.0f;
var result0 = new ResultPoint(centerx + ratio * dx, centery + ratio * dy);
var result2 = new ResultPoint(centerx - ratio * dx, centery - ratio * dy);
dx = cornerPoints[1].X - cornerPoints[3].X;
dy = cornerPoints[1].Y - cornerPoints[3].Y;
centerx = (cornerPoints[1].X + cornerPoints[3].X) / 2.0f;
centery = (cornerPoints[1].Y + cornerPoints[3].Y) / 2.0f;
var result1 = new ResultPoint(centerx + ratio * dx, centery + ratio * dy);
var result3 = new ResultPoint(centerx - ratio * dx, centery - ratio * dy);
return(new ResultPoint[] { result0, result1, result2, result3 });
}
private static PerspectiveTransform createTransform(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft, ResultPoint alignmentPattern, int dimension)
{
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float dimMinusThree = (float)dimension - 3.5f;
float bottomRightX;
float bottomRightY;
float sourceBottomRightX;
float sourceBottomRightY;
if (alignmentPattern != null)
{
bottomRightX = alignmentPattern.X;
bottomRightY = alignmentPattern.Y;
sourceBottomRightX = sourceBottomRightY = dimMinusThree - 3.0f;
}
else
{
// Don't have an alignment pattern, just make up the bottom-right point
bottomRightX = (topRight.X - topLeft.X) + bottomLeft.X;
bottomRightY = (topRight.Y - topLeft.Y) + bottomLeft.Y;
sourceBottomRightX = sourceBottomRightY = dimMinusThree;
}
return(PerspectiveTransform.quadrilateralToQuadrilateral(
3.5f,
3.5f,
dimMinusThree,
3.5f,
sourceBottomRightX,
sourceBottomRightY,
3.5f,
dimMinusThree,
topLeft.X,
topLeft.Y,
topRight.X,
topRight.Y,
bottomRightX,
bottomRightY,
bottomLeft.X,
bottomLeft.Y));
}
/// <summary>
/// Initializes a new instance of the <see cref="ZXing.PDF417.Internal.BoundingBox"/> class.
/// Will throw an exception if the corner points don't match up correctly
/// </summary>
/// <param name="image">Image.</param>
/// <param name="topLeft">Top left.</param>
/// <param name="topRight">Top right.</param>
/// <param name="bottomLeft">Bottom left.</param>
/// <param name="bottomRight">Bottom right.</param>
public BoundingBox(BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint topRight,
ResultPoint bottomRight)
{
if ((topLeft == null && topRight == null) ||
(bottomLeft == null && bottomRight == null) ||
(topLeft != null && bottomLeft == null) ||
(topRight != null && bottomRight == null))
{
throw ReaderException.Instance;
}
this.Image = image;
this.TopLeft = topLeft;
this.TopRight = topRight;
this.BottomLeft = bottomLeft;
this.BottomRight = bottomRight;
CalculateMinMaxValues();
}
private static Point GetScanLineVector(Point[] scanLine)
{
ResultPoint vScan = new ResultPoint(scanLine[1].X - scanLine[0].X, scanLine[1].Y - scanLine[0].Y);
int dx = Math.Sign(vScan.X);
int dy = Math.Sign(vScan.Y);
if (dx != 0 && dy != 0)
{
// Линия диагональная, такого быть не должно, но так как координаты float всё может быть,
// тогда чья линия длиннее тот и прав
if (Math.Abs(vScan.X) < Math.Abs(vScan.Y))
{
dx = 0;
}
else
{
dy = 0;
}
}
return(new Point(dx, dy));
}
/// <summary>
/// Initializes a new instance of the <see cref="ZXing.PDF417.Internal.BoundingBox"/> class.
/// Will throw an exception if the corner points don't match up correctly
/// </summary>
/// <param name="image">Image.</param>
/// <param name="topLeft">Top left.</param>
/// <param name="topRight">Top right.</param>
/// <param name="bottomLeft">Bottom left.</param>
/// <param name="bottomRight">Bottom right.</param>
public BoundingBox(BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint topRight,
ResultPoint bottomRight)
{
if ((topLeft == null && topRight == null) ||
(bottomLeft == null && bottomRight == null) ||
(topLeft != null && bottomLeft == null) ||
(topRight != null && bottomRight == null))
{
throw ReaderException.Instance;
}
this.Image = image;
this.TopLeft = topLeft;
this.TopRight = topRight;
this.BottomLeft = bottomLeft;
this.BottomRight = bottomRight;
CalculateMinMaxValues();
}
/// <summary>
/// Calculates the position of the white top right module using the output of the rectangle detector
/// for a square matrix
/// </summary>
private ResultPoint correctTopRight(ResultPoint bottomLeft,
ResultPoint bottomRight,
ResultPoint topLeft,
ResultPoint topRight,
int dimension)
{
float corr = distance(bottomLeft, bottomRight) / (float)dimension;
int norm = distance(topLeft, topRight);
float cos = (topRight.X - topLeft.X) / norm;
float sin = (topRight.Y - topLeft.Y) / norm;
ResultPoint c1 = new ResultPoint(topRight.X + corr * cos, topRight.Y + corr * sin);
corr = distance(bottomLeft, topLeft) / (float)dimension;
norm = distance(bottomRight, topRight);
cos = (topRight.X - bottomRight.X) / norm;
sin = (topRight.Y - bottomRight.Y) / norm;
ResultPoint c2 = new ResultPoint(topRight.X + corr * cos, topRight.Y + corr * sin);
if (!isValid(c1))
{
if (isValid(c2))
{
return(c2);
}
return(null);
}
if (!isValid(c2))
{
return(c1);
}
int l1 = Math.Abs(transitionsBetween(topLeft, c1).Transitions -
transitionsBetween(bottomRight, c1).Transitions);
int l2 = Math.Abs(transitionsBetween(topLeft, c2).Transitions -
transitionsBetween(bottomRight, c2).Transitions);
return(l1 <= l2 ? c1 : c2);
}
/// <summary>
/// Locates and decodes a barcode in some format within an image. This method also accepts
/// hints, each possibly associated to some data, which may help the implementation decode.
/// Note that we don't try rotation without the try harder flag, even if rotation was supported.
/// </summary>
/// <param name="image">image of barcode to decode</param>
/// <param name="hints">passed as a <see cref="IDictionary{TKey, TValue}"/> from <see cref="DecodeHintType"/>
/// to arbitrary data. The
/// meaning of the data depends upon the hint type. The implementation may or may not do
/// anything with these hints.</param>
/// <returns>
/// String which the barcode encodes
/// </returns>
virtual public Result decode(BinaryBitmap image, IDictionary <DecodeHintType, object> hints)
{
var result = doDecode(image, hints);
if (result == null)
{
bool tryHarder = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER);
bool tryHarderWithoutRotation = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER_WITHOUT_ROTATION);
if (tryHarder && !tryHarderWithoutRotation && image.RotateSupported)
{
BinaryBitmap rotatedImage = image.rotateCounterClockwise();
result = doDecode(rotatedImage, hints);
if (result == null)
{
return(null);
}
// Record that we found it rotated 90 degrees CCW / 270 degrees CW
IDictionary <ResultMetadataType, object> metadata = result.ResultMetadata;
int orientation = 270;
if (metadata != null && metadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
// But if we found it reversed in doDecode(), add in that result here:
orientation = (orientation +
(int)metadata[ResultMetadataType.ORIENTATION]) % 360;
}
result.putMetadata(ResultMetadataType.ORIENTATION, orientation);
// Update result points
ResultPoint[] points = result.ResultPoints;
if (points != null)
{
int height = rotatedImage.Height;
for (int i = 0; i < points.Length; i++)
{
points[i] = new ResultPoint(height - points[i].Y - 1, points[i].X);
}
}
}
}
return(result);
}
/// <summary>
/// Detect a second solid side next to first solid side.
/// </summary>
/// <param name="points"></param>
/// <returns></returns>
private ResultPoint[] detectSolid2(ResultPoint[] points)
{
// A..D
// : :
// B--C
ResultPoint pointA = points[0];
ResultPoint pointB = points[1];
ResultPoint pointC = points[2];
ResultPoint pointD = points[3];
// Transition detection on the edge is not stable.
// To safely detect, shift the points to the module center.
int tr = transitionsBetween(pointA, pointD);
ResultPoint pointBs = shiftPoint(pointB, pointC, (tr + 1) * 4);
ResultPoint pointCs = shiftPoint(pointC, pointB, (tr + 1) * 4);
int trBA = transitionsBetween(pointBs, pointA);
int trCD = transitionsBetween(pointCs, pointD);
// 0..3
// | :
// 1--2
if (trBA < trCD)
{
// solid sides: A-B-C
points[0] = pointA;
points[1] = pointB;
points[2] = pointC;
points[3] = pointD;
}
else
{
// solid sides: B-C-D
points[0] = pointB;
points[1] = pointC;
points[2] = pointD;
points[3] = pointA;
}
return(points);
}
/// <summary>
/// recenters the points of a constant distance towards the center
/// </summary>
/// <param name="y">bottom most point</param>
/// <param name="z">left most point</param>
/// <param name="x">right most point</param>
/// <param name="t">top most point</param>
/// <returns><see cref="ResultPoint"/>[] describing the corners of the rectangular
/// region. The first and last points are opposed on the diagonal, as
/// are the second and third. The first point will be the topmost
/// point and the last, the bottommost. The second point will be
/// leftmost and the third, the rightmost</returns>
private ResultPoint[] centerEdges(ResultPoint y, ResultPoint z,
ResultPoint x, ResultPoint t)
{
//
// t t
// z x
// x OR z
// y y
//
float yi = y.X;
float yj = y.Y;
float zi = z.X;
float zj = z.Y;
float xi = x.X;
float xj = x.Y;
float ti = t.X;
float tj = t.Y;
if (yi < width / 2.0f)
{
return(new[]
{
new ResultPoint(ti - CORR, tj + CORR),
new ResultPoint(zi + CORR, zj + CORR),
new ResultPoint(xi - CORR, xj - CORR),
new ResultPoint(yi + CORR, yj - CORR)
});
}
else
{
return(new[]
{
new ResultPoint(ti + CORR, tj + CORR),
new ResultPoint(zi + CORR, zj - CORR),
new ResultPoint(xi - CORR, xj + CORR),
new ResultPoint(yi - CORR, yj - CORR)
});
}
}
/// <summary>
/// <p>Computes the dimension (number of modules on a size) of the QR Code based on the position
/// of the finder patterns and estimated module size.</p>
/// </summary>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: private static int computeDimension(com.google.zxing.ResultPoint topLeft, com.google.zxing.ResultPoint topRight, com.google.zxing.ResultPoint bottomLeft, float moduleSize) throws com.google.zxing.NotFoundException
private static int computeDimension(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft, float moduleSize)
{
int tltrCentersDimension = MathUtils.round(ResultPoint.distance(topLeft, topRight) / moduleSize);
int tlblCentersDimension = MathUtils.round(ResultPoint.distance(topLeft, bottomLeft) / moduleSize);
int dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
switch (dimension & 0x03) // mod 4
{
case 0:
dimension++;
break;
// 1? do nothing
case 2:
dimension--;
break;
case 3:
throw NotFoundException.NotFoundInstance;
}
return(dimension);
}
public static double HyperVolume(List <ResultPoint> resultPoints, ResultPoint referencePoint = null)
{
var scores = new List <double>();
var engine = REngine.GetInstance();
engine.ClearGlobalEnvironment();
foreach (var point in resultPoints)
{
scores.Add(point.Macro);
scores.Add(point.PreparationTime);
scores.Add(point.Cost);
scores.Add(point.Preferences);
}
if (referencePoint != null)
{
engine.SetSymbol("useReferecnePoint", engine.CreateLogical(true));
engine.SetSymbol("referencePoint", engine.CreateNumericVector(new []
{
referencePoint.Macro, referencePoint.PreparationTime, referencePoint.Cost, referencePoint.Preferences
}));
}
else
{
engine.SetSymbol("useReferecnePoint", engine.CreateLogical(false));
}
engine.SetSymbol("data", engine.CreateNumericVector(scores.ToArray()));
engine.SetSymbol("individuals", engine.CreateNumericVector(new double[] { resultPoints.Count }));
engine.SetSymbol("criterions", engine.CreateNumericVector(new double[] { 4 }));
RunScript("hv", engine);
var hv = engine.GetSymbol("dhv").AsNumeric().ToArray().First();
return(hv);
}
private static ResultPoint[] GetBarCodeRect(Point[] scanLine, ResultPoint[] whiterect, float dx)
{
ResultPoint pt0 = new ResultPoint(scanLine[0].X, scanLine[0].Y); // Начало линии сканирования (заканчивается за 3 штрихполоски до начала штрихкода)
ResultPoint pt1 = new ResultPoint(scanLine[1].X, scanLine[1].Y); // Конец линии сканирования (заканчивается за 3 штрихполоски до конца штрихкода)
// whiterect п/у ограничивающий одну или несколько полосок штрих кода,
// сделаем его направленным, повернем вдоль скан линии, чтобы можно было ширину расширить
whiterect = RotateRect(whiterect, scanLine);
// Проекция точки x,y на найденную полоску штрихкода.
ResultPoint proj = Projection(pt1, whiterect[1], whiterect[0]);
float vLen = ResultPoint.distance(pt1, proj);
ResultPoint v = new ResultPoint(pt1.X - proj.X, pt1.Y - proj.Y);
// Вектор b перпендикулярный вектору a против часовой стрелки равен b = (-ay, ax).
// Найдем правую нормаль к вертикальной полоске
float height = ResultPoint.distance(whiterect[1], whiterect[0]);
ResultPoint vOrto = new ResultPoint(-(whiterect[1].Y - whiterect[0].Y) / height, (whiterect[1].X - whiterect[0].X) / height);
var lastBarCodeLine = new ResultPoint[2] {
new ResultPoint(whiterect[0].X + v.X - vOrto.X * dx, whiterect[0].Y + v.Y - vOrto.Y * dx),
new ResultPoint(whiterect[1].X + v.X - vOrto.X * dx, whiterect[1].Y + v.Y - vOrto.Y * dx)
};
ResultPoint proj0 = Projection(pt0, whiterect[1], whiterect[0]);
ResultPoint v0 = new ResultPoint(pt0.X - proj0.X, pt0.Y - proj0.Y);
var firstBarCodeLine = new ResultPoint[2] {
new ResultPoint(whiterect[0].X + v0.X + vOrto.X * dx, whiterect[0].Y + v0.Y + vOrto.Y * dx),
new ResultPoint(whiterect[1].X + v0.X + vOrto.X * dx, whiterect[1].Y + v0.Y + vOrto.Y * dx)
};
return(new ResultPoint[] {
firstBarCodeLine[0],
firstBarCodeLine[1],
lastBarCodeLine[0],
lastBarCodeLine[1]
});
}
/**
* <p>Estimates module size based on two finder patterns -- it uses
* {@link #sizeOfBlackWhiteBlackRunBothWays(int, int, int, int)} to figure the
* width of each, measuring along the axis between their centers.</p>
*/
private float calculateModuleSizeOneWay(ResultPoint pattern, ResultPoint otherPattern)
{
float moduleSizeEst1 = sizeOfBlackWhiteBlackRunBothWays((int)pattern.getX(),
(int)pattern.getY(),
(int)otherPattern.getX(),
(int)otherPattern.getY());
float moduleSizeEst2 = sizeOfBlackWhiteBlackRunBothWays((int)otherPattern.getX(),
(int)otherPattern.getY(),
(int)pattern.getX(),
(int)pattern.getY());
if (Single.IsNaN(moduleSizeEst1))
{
return(moduleSizeEst2);
}
if (Single.IsNaN(moduleSizeEst2))
{
return(moduleSizeEst1);
}
// Average them, and divide by 7 since we've counted the width of 3 black modules,
// and 1 white and 1 black module on either side. Ergo, divide sum by 14.
return((moduleSizeEst1 + moduleSizeEst2) / 14.0f);
}
/// <summary> <p>Computes the dimension (number of modules on a size) of the QR Code based on the position
/// of the finder patterns and estimated module size.</p>
/// </summary>
protected internal static int computeDimension(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft, float moduleSize)
{
int tltrCentersDimension = round(ResultPoint.distance(topLeft, topRight) / moduleSize);
int tlblCentersDimension = round(ResultPoint.distance(topLeft, bottomLeft) / moduleSize);
int dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
switch (dimension & 0x03)
{
// mod 4
case 0:
dimension++;
break;
// 1? do nothing
case 2:
dimension--;
break;
case 3:
throw ReaderException.Instance;
}
return(dimension);
}
/// <summary> <p>Computes the dimension (number of modules on a size) of the QR Code based on the position
/// of the finder patterns and estimated module size.</p>
/// </summary>
private static bool computeDimension(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft, float moduleSize, out int dimension)
{
int tltrCentersDimension = MathUtils.round(ResultPoint.distance(topLeft, topRight) / moduleSize);
int tlblCentersDimension = MathUtils.round(ResultPoint.distance(topLeft, bottomLeft) / moduleSize);
dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
switch (dimension & 0x03)
{
// mod 4
case 0:
dimension++;
break;
// 1? do nothing
case 2:
dimension--;
break;
case 3:
return(true);
}
return(true);
}
/**
* <p>Orders an array of three ResultPoints in an order [A,B,C] such that AB < AC and
* BC < AC and the angle between BC and BA is less than 180 degrees.
*/
public static void orderBestPatterns(ResultPoint[] patterns) {
// Find distances between pattern centers
float zeroOneDistance = distance(patterns[0], patterns[1]);
float oneTwoDistance = distance(patterns[1], patterns[2]);
float zeroTwoDistance = distance(patterns[0], patterns[2]);
ResultPoint pointA, pointB, pointC;
// Assume one closest to other two is B; A and C will just be guesses at first
if (oneTwoDistance >= zeroOneDistance && oneTwoDistance >= zeroTwoDistance) {
pointB = patterns[0];
pointA = patterns[1];
pointC = patterns[2];
} else if (zeroTwoDistance >= oneTwoDistance && zeroTwoDistance >= zeroOneDistance) {
pointB = patterns[1];
pointA = patterns[0];
pointC = patterns[2];
} else {
pointB = patterns[2];
pointA = patterns[0];
pointC = patterns[1];
}
// Use cross product to figure out whether A and C are correct or flipped.
// This asks whether BC x BA has a positive z component, which is the arrangement
// we want for A, B, C. If it's negative, then we've got it flipped around and
// should swap A and C.
if (crossProductZ(pointA, pointB, pointC) < 0.0f) {
ResultPoint temp = pointA;
pointA = pointC;
pointC = temp;
}
patterns[0] = pointA;
patterns[1] = pointB;
patterns[2] = pointC;
}
// Note that we don't try rotation without the try harder flag, even if rotation was supported.
public virtual Result Decode(BinaryBitmap image, System.Collections.Hashtable hints)
{
try
{
return(doDecode(image, hints));
}
catch (ReaderException re)
{
bool tryHarder = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER);
if (tryHarder && image.RotateSupported)
{
BinaryBitmap rotatedImage = image.rotateCounterClockwise();
Result result = doDecode(rotatedImage, hints);
// Record that we found it rotated 90 degrees CCW / 270 degrees CW
System.Collections.Hashtable metadata = result.ResultMetadata;
int orientation = 270;
if (metadata != null && metadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
// But if we found it reversed in doDecode(), add in that result here:
orientation = (orientation + ((System.Int32)metadata[ResultMetadataType.ORIENTATION])) % 360;
}
result.putMetadata(ResultMetadataType.ORIENTATION, (System.Object)orientation);
// Update result points
ResultPoint[] points = result.ResultPoints;
int height = rotatedImage.Height;
for (int i = 0; i < points.Length; i++)
{
points[i] = new ResultPoint(height - points[i].Y - 1, points[i].X);
}
return(result);
}
else
{
throw re;
}
}
}
// Note that we don't try rotation without the try harder flag, even if rotation was supported.
public virtual Result decode(BinaryBitmap image, System.Collections.Generic.Dictionary <Object,Object> hints)
{
try
{
return doDecode(image, hints);
}
catch (ReaderException re)
{
bool tryHarder = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER);
if (tryHarder && image.RotateSupported)
{
BinaryBitmap rotatedImage = image.rotateCounterClockwise();
Result result = doDecode(rotatedImage, hints);
// Record that we found it rotated 90 degrees CCW / 270 degrees CW
System.Collections.Generic.Dictionary <Object,Object> metadata = result.ResultMetadata;
int orientation = 270;
if (metadata != null && metadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
// But if we found it reversed in doDecode(), add in that result here:
orientation = (orientation + ((System.Int32) metadata[ResultMetadataType.ORIENTATION])) % 360;
}
result.putMetadata(ResultMetadataType.ORIENTATION, (System.Object) orientation);
// Update result points
ResultPoint[] points = result.ResultPoints;
int height = rotatedImage.Height;
for (int i = 0; i < points.Length; i++)
{
points[i] = new ResultPoint(height - points[i].Y - 1, points[i].X);
}
return result;
}
else
{
throw re;
}
}
}
private static BitMatrix sampleGrid(MonochromeBitmapSource image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint bottomRight,
int dimension)
{
// We make up the top right point for now, based on the others.
// TODO: we actually found a fourth corner above and figured out which of two modules
// it was the corner of. We could use that here and adjust for perspective distortion.
float topRightX = (bottomRight.getX() - bottomLeft.getX()) + topLeft.getX();
float topRightY = (bottomRight.getY() - bottomLeft.getY()) + topLeft.getY();
// Note that unlike in the QR Code sampler, we didn't find the center of modules, but the
// very corners. So there is no 0.5f here; 0.0f is right.
GridSampler sampler = GridSampler.Instance;
return(sampler.sampleGrid(
image,
dimension,
0.0f,
0.0f,
dimension,
0.0f,
dimension,
dimension,
0.0f,
dimension,
topLeft.getX(),
topLeft.getY(),
topRightX,
topRightY,
bottomRight.getX(),
bottomRight.getY(),
bottomLeft.getX(),
bottomLeft.getY()));
}
/// <summary>
/// Creates a BitMatrix by sampling the provided image.
/// topLeft, topRight, bottomRight, and bottomLeft are the centers of the squares on the
/// diagonal just outside the bull's eye.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="topLeft">The top left.</param>
/// <param name="bottomLeft">The bottom left.</param>
/// <param name="bottomRight">The bottom right.</param>
/// <param name="topRight">The top right.</param>
/// <returns></returns>
private BitMatrix sampleGrid(BitMatrix image,
ResultPoint topLeft,
ResultPoint topRight,
ResultPoint bottomRight,
ResultPoint bottomLeft)
{
GridSampler sampler = GridSampler.Instance;
int dimension = getDimension();
float low = dimension / 2.0f - nbCenterLayers;
float high = dimension / 2.0f + nbCenterLayers;
return(sampler.sampleGrid(image,
dimension,
dimension,
low, low, // topleft
high, low, // topright
high, high, // bottomright
low, high, // bottomleft
topLeft.X, topLeft.Y,
topRight.X, topRight.Y,
bottomRight.X, bottomRight.Y,
bottomLeft.X, bottomLeft.Y));
}
/// <summary> Increments the Integer associated with a key by one.</summary>
private static void increment(System.Collections.Hashtable table, ResultPoint key)
{
//System.Int32 value_Renamed = (System.Int32) table[key];
////UPGRADE_TODO: The 'System.Int32' structure does not have an equivalent to NULL. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1291'"
//table[key] = value_Renamed == null?INTEGERS[1]:INTEGERS[value_Renamed + 1];
// Redivivus.in Java to c# Porting update
// 30/01/2010
// Added
// START
System.Int32 value_Renamed = 0;
try
{
if (table.Count > 0)
{
value_Renamed = (System.Int32)table[key];
}
}
catch
{
value_Renamed = 0;
}
table[key] = value_Renamed == 0 ? INTEGERS[1] : INTEGERS[value_Renamed + 1];
//END
}
protected internal virtual DetectorResult processFinderPatternInfo(FinderPatternInfo info)
{
FinderPattern topLeft = info.TopLeft;
FinderPattern topRight = info.TopRight;
FinderPattern bottomLeft = info.BottomLeft;
float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
if (moduleSize < 1.0f)
{
throw ReaderException.Instance;
}
int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
int modulesBetweenFPCenters = provisionalVersion.DimensionForVersion - 7;
PerspectiveTransform transform = createTransform(topLeft, topRight, bottomLeft, dimension);
BitMatrix bits = sampleGrid(image, transform, dimension);
ResultPoint[] points;
points = new ResultPoint[] { bottomLeft, topLeft, topRight };
return(new DetectorResult(bits, points));
}
/// <summary>
/// Samples an Aztec matrix from an image
/// </summary>
/// <param name="image">The image.</param>
/// <param name="topLeft">The top left.</param>
/// <param name="bottomLeft">The bottom left.</param>
/// <param name="bottomRight">The bottom right.</param>
/// <param name="topRight">The top right.</param>
/// <returns></returns>
private BitMatrix sampleGrid(BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint bottomRight,
ResultPoint topRight)
{
int dimension;
if (compact)
{
dimension = 4 * nbLayers + 11;
}
else
{
if (nbLayers <= 4)
{
dimension = 4 * nbLayers + 15;
}
else
{
dimension = 4 * nbLayers + 2 * ((nbLayers - 4) / 8 + 1) + 15;
}
}
GridSampler sampler = GridSampler.Instance;
return sampler.sampleGrid(image,
dimension,
dimension,
0.5f,
0.5f,
dimension - 0.5f,
0.5f,
dimension - 0.5f,
dimension - 0.5f,
0.5f,
dimension - 0.5f,
topLeft.X,
topLeft.Y,
topRight.X,
topRight.Y,
bottomRight.X,
bottomRight.Y,
bottomLeft.X,
bottomLeft.Y);
}
/// <summary>
/// recenters the points of a constant distance towards the center
/// </summary>
/// <param name="y">bottom most point</param>
/// <param name="z">left most point</param>
/// <param name="x">right most point</param>
/// <param name="t">top most point</param>
/// <returns><see cref="ResultPoint"/>[] describing the corners of the rectangular
/// region. The first and last points are opposed on the diagonal, as
/// are the second and third. The first point will be the topmost
/// point and the last, the bottommost. The second point will be
/// leftmost and the third, the rightmost</returns>
private ResultPoint[] centerEdges(ResultPoint y, ResultPoint z,
ResultPoint x, ResultPoint t)
{
//
// t t
// z x
// x OR z
// y y
//
float yi = y.X;
float yj = y.Y;
float zi = z.X;
float zj = z.Y;
float xi = x.X;
float xj = x.Y;
float ti = t.X;
float tj = t.Y;
if (yi < width / 2.0f)
{
return new[]
{
new ResultPoint(ti - CORR, tj + CORR),
new ResultPoint(zi + CORR, zj + CORR),
new ResultPoint(xi - CORR, xj - CORR),
new ResultPoint(yi + CORR, yj - CORR)
};
}
else
{
return new[]
{
new ResultPoint(ti + CORR, tj + CORR),
new ResultPoint(zi + CORR, zj - CORR),
new ResultPoint(xi - CORR, xj + CORR),
new ResultPoint(yi - CORR, yj - CORR)
};
}
}
/// <summary>
/// If we adjust the width, set a new right corner coordinate and recalculate
/// </summary>
/// <param name="bottomRight">Bottom right.</param>
internal void SetBottomRight(ResultPoint bottomRight)
{
this.BottomRight = bottomRight;
calculateMinMaxValues();
}
/// <summary>
/// Calculates the minimum and maximum X & Y values based on the corner points.
/// </summary>
private void calculateMinMaxValues()
{
// Constructor ensures that either Left or Right is not null
if (TopLeft == null)
{
TopLeft = new ResultPoint(0, TopRight.Y);
BottomLeft = new ResultPoint(0, BottomRight.Y);
}
else if (TopRight == null)
{
TopRight = new ResultPoint(image.Width - 1, TopLeft.Y);
BottomRight = new ResultPoint(image.Width - 1, TopLeft.Y);
}
MinX = (int)Math.Min(TopLeft.X, BottomLeft.X);
MaxX = (int)Math.Max(TopRight.X, BottomRight.X);
MinY = (int)Math.Min(TopLeft.Y, TopRight.Y);
MaxY = (int)Math.Max(BottomLeft.Y, BottomRight.Y);
}
/// <summary>
/// Adds the missing rows.
/// </summary>
/// <returns>The missing rows.</returns>
/// <param name="missingStartRows">Missing start rows.</param>
/// <param name="missingEndRows">Missing end rows.</param>
/// <param name="isLeft">If set to <c>true</c> is left.</param>
public BoundingBox addMissingRows(int missingStartRows, int missingEndRows, bool isLeft)
{
ResultPoint newTopLeft = TopLeft;
ResultPoint newBottomLeft = BottomLeft;
ResultPoint newTopRight = TopRight;
ResultPoint newBottomRight = BottomRight;
if (missingStartRows > 0)
{
ResultPoint top = isLeft ? TopLeft : TopRight;
int newMinY = (int)top.Y - missingStartRows;
if (newMinY < 0)
{
newMinY = 0;
}
// TODO use existing points to better interpolate the new x positions
ResultPoint newTop = new ResultPoint(top.X, newMinY);
if (isLeft)
{
newTopLeft = newTop;
}
else
{
newTopRight = newTop;
}
}
if (missingEndRows > 0)
{
ResultPoint bottom = isLeft ? BottomLeft : BottomRight;
int newMaxY = (int)bottom.Y + missingEndRows;
if (newMaxY >= image.Height)
{
newMaxY = image.Height - 1;
}
// TODO use existing points to better interpolate the new x positions
ResultPoint newBottom = new ResultPoint(bottom.X, newMaxY);
if (isLeft)
{
newBottomLeft = newBottom;
}
else
{
newBottomRight = newBottom;
}
}
calculateMinMaxValues();
return new BoundingBox(image, newTopLeft, newBottomLeft, newTopRight, newBottomRight);
}
/// <summary>
/// Initializes a new instance of the <see cref="ZXing.PDF417.Internal.BoundingBox"/> class.
/// Will throw an exception if the corner points don't match up correctly
/// </summary>
/// <param name="image">Image.</param>
/// <param name="topLeft">Top left.</param>
/// <param name="topRight">Top right.</param>
/// <param name="bottomLeft">Bottom left.</param>
/// <param name="bottomRight">Bottom right.</param>
private BoundingBox(BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint topRight,
ResultPoint bottomRight)
{
this.image = image;
this.TopLeft = topLeft;
this.TopRight = topRight;
this.BottomLeft = bottomLeft;
this.BottomRight = bottomRight;
calculateMinMaxValues();
}
/// <summary> <p>Computes the dimension (number of modules on a size) of the QR Code based on the position
/// of the finder patterns and estimated module size.</p>
/// </summary>
private static bool computeDimension(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft, float moduleSize, out int dimension)
{
int tltrCentersDimension = MathUtils.round(ResultPoint.distance(topLeft, topRight) / moduleSize);
int tlblCentersDimension = MathUtils.round(ResultPoint.distance(topLeft, bottomLeft) / moduleSize);
dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
switch (dimension & 0x03)
{
// mod 4
case 0:
dimension++;
break;
// 1? do nothing
case 2:
dimension--;
break;
case 3:
return true;
}
return true;
}
/// <summary>
/// Gets the minimum width of the codeword.
/// </summary>
/// <returns>The minimum codeword width.</returns>
/// <param name="p">P.</param>
private static int GetMinCodewordWidth(ResultPoint[] p)
{
return Math.Min(
Math.Min(GetMinWidth(p[0], p[4]), GetMinWidth(p[6], p[2]) * PDF417Common.MODULES_IN_CODEWORD /
PDF417Common.MODULES_IN_STOP_PATTERN),
Math.Min(GetMinWidth(p[1], p[5]), GetMinWidth(p[7], p[3]) * PDF417Common.MODULES_IN_CODEWORD /
PDF417Common.MODULES_IN_STOP_PATTERN));
}
/// <summary>
/// Gets the row indicator column.
/// </summary>
/// <returns>The row indicator column.</returns>
/// <param name="image">Image.</param>
/// <param name="boundingBox">Bounding box.</param>
/// <param name="startPoint">Start point.</param>
/// <param name="leftToRight">If set to <c>true</c> left to right.</param>
/// <param name="minCodewordWidth">Minimum codeword width.</param>
/// <param name="maxCodewordWidth">Max codeword width.</param>
private static DetectionResultRowIndicatorColumn getRowIndicatorColumn(BitMatrix image,
BoundingBox boundingBox,
ResultPoint startPoint,
bool leftToRight,
int minCodewordWidth,
int maxCodewordWidth)
{
DetectionResultRowIndicatorColumn rowIndicatorColumn = new DetectionResultRowIndicatorColumn(boundingBox, leftToRight);
for (int i = 0; i < 2; i++)
{
int increment = i == 0 ? 1 : -1;
int startColumn = (int) startPoint.X;
for (int imageRow = (int) startPoint.Y; imageRow <= boundingBox.MaxY &&
imageRow >= boundingBox.MinY; imageRow += increment)
{
Codeword codeword = detectCodeword(image, 0, image.Width, leftToRight, startColumn, imageRow,
minCodewordWidth, maxCodewordWidth);
if (codeword != null)
{
rowIndicatorColumn.setCodeword(imageRow, codeword);
if (leftToRight)
{
startColumn = codeword.StartX;
}
else
{
startColumn = codeword.EndX;
}
}
}
}
return rowIndicatorColumn;
}
/// <summary>
/// Gets the minimum width of the barcode
/// </summary>
/// <returns>The minimum width.</returns>
/// <param name="p1">P1.</param>
/// <param name="p2">P2.</param>
private static int GetMinWidth(ResultPoint p1, ResultPoint p2)
{
if (p1 == null || p2 == null)
{
return int.MaxValue;
}
return (int)Math.Abs(p1.X - p2.X);
}
/// <summary> <p>Estimates module size based on two finder patterns -- it uses
/// {@link #sizeOfBlackWhiteBlackRunBothWays(int, int, int, int)} to figure the
/// width of each, measuring along the axis between their centers.</p>
/// </summary>
private float calculateModuleSizeOneWay(ResultPoint pattern, ResultPoint otherPattern)
{
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float moduleSizeEst1 = sizeOfBlackWhiteBlackRunBothWays((int)pattern.X, (int)pattern.Y, (int)otherPattern.X, (int)otherPattern.Y);
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float moduleSizeEst2 = sizeOfBlackWhiteBlackRunBothWays((int)otherPattern.X, (int)otherPattern.Y, (int)pattern.X, (int)pattern.Y);
if (Single.IsNaN(moduleSizeEst1))
{
return moduleSizeEst2 / 7.0f;
}
if (Single.IsNaN(moduleSizeEst2))
{
return moduleSizeEst1 / 7.0f;
}
// Average them, and divide by 7 since we've counted the width of 3 black modules,
// and 1 white and 1 black module on either side. Ergo, divide sum by 14.
return (moduleSizeEst1 + moduleSizeEst2) / 14.0f;
}
/// <summary> <p>Computes an average estimated module size based on estimated derived from the positions
/// of the three finder patterns.</p>
/// </summary>
protected internal virtual float calculateModuleSize(ResultPoint topLeft, ResultPoint topRight, ResultPoint bottomLeft)
{
// Take the average
return (calculateModuleSizeOneWay(topLeft, topRight) + calculateModuleSizeOneWay(topLeft, bottomLeft)) / 2.0f;
}
private void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b)
{
canvas.DrawLine(a.X, a.Y, b.X, b.Y, paint);
}
/// <summary>
/// Locate the vertices and the codewords area of a black blob using the Start and Stop patterns as locators.
/// </summary>
/// <param name="matrix">Matrix.</param>
/// <param name="startRow">Start row.</param>
/// <param name="startColumn">Start column.</param>
/// <returns> an array containing the vertices:
/// vertices[0] x, y top left barcode
/// vertices[1] x, y bottom left barcode
/// vertices[2] x, y top right barcode
/// vertices[3] x, y bottom right barcode
/// vertices[4] x, y top left codeword area
/// vertices[5] x, y bottom left codeword area
/// vertices[6] x, y top right codeword area
/// vertices[7] x, y bottom right codeword area
/// </returns>
private static ResultPoint[] FindVertices(BitMatrix matrix, int startRow, int startColumn) {
int height = matrix.Height;
int width = matrix.Width;
ResultPoint[] result = new ResultPoint[8];
CopyToResult(result, FindRowsWithPattern(matrix, height, width, startRow, startColumn, START_PATTERN),
INDEXES_START_PATTERN);
if (result[4] != null) {
startColumn = (int) result[4].X;
startRow = (int) result[4].Y;
}
CopyToResult(result, FindRowsWithPattern(matrix, height, width, startRow, startColumn, STOP_PATTERN),
INDEXES_STOP_PATTERN);
return result;
}
private static Result translateResultPoints(Result result, int xOffset, int yOffset)
{
ResultPoint[] oldResultPoints = result.ResultPoints;
ResultPoint[] newResultPoints = new ResultPoint[oldResultPoints.Length];
for (int i = 0; i < oldResultPoints.Length; i++)
{
ResultPoint oldPoint = oldResultPoints[i];
newResultPoints[i] = new ResultPoint(oldPoint.X + xOffset, oldPoint.Y + yOffset);
}
return new Result(result.Text, result.RawBytes, newResultPoints, result.BarcodeFormat);
}
/// <summary>
/// Finds the rows with the given pattern.
/// </summary>
/// <returns>The rows with pattern.</returns>
/// <param name="matrix">Matrix.</param>
/// <param name="height">Height.</param>
/// <param name="width">Width.</param>
/// <param name="startRow">Start row.</param>
/// <param name="startColumn">Start column.</param>
/// <param name="pattern">Pattern.</param>
private static ResultPoint[] FindRowsWithPattern(
BitMatrix matrix,
int height,
int width,
int startRow,
int startColumn,
int[] pattern) {
ResultPoint[] result = new ResultPoint[4];
bool found = false;
int[] counters = new int[pattern.Length];
for (; startRow < height; startRow += ROW_STEP) {
int[] loc = FindGuardPattern(matrix, startColumn, startRow, width, false, pattern, counters);
if (loc != null) {
while (startRow > 0) {
int[] previousRowLoc = FindGuardPattern(matrix, startColumn, --startRow, width, false, pattern, counters);
if (previousRowLoc != null) {
loc = previousRowLoc;
} else {
startRow++;
break;
}
}
result[0] = new ResultPoint(loc[0], startRow);
result[1] = new ResultPoint(loc[1], startRow);
found = true;
break;
}
}
int stopRow = startRow + 1;
// Last row of the current symbol that contains pattern
if (found) {
int skippedRowCount = 0;
int[] previousRowLoc = {(int) result[0].X, (int) result[1].X};
for (; stopRow < height; stopRow++) {
int[] loc = FindGuardPattern(matrix, previousRowLoc[0], stopRow, width, false, pattern, counters);
// a found pattern is only considered to belong to the same barcode if the start and end positions
// don't differ too much. Pattern drift should be not bigger than two for consecutive rows. With
// a higher number of skipped rows drift could be larger. To keep it simple for now, we allow a slightly
// larger drift and don't check for skipped rows.
if (loc != null &&
Math.Abs(previousRowLoc[0] - loc[0]) < MAX_PATTERN_DRIFT &&
Math.Abs(previousRowLoc[1] - loc[1]) < MAX_PATTERN_DRIFT) {
previousRowLoc = loc;
skippedRowCount = 0;
} else {
if (skippedRowCount > SKIPPED_ROW_COUNT_MAX) {
break;
} else {
skippedRowCount++;
}
}
}
stopRow -= skippedRowCount + 1;
result[2] = new ResultPoint(previousRowLoc[0], stopRow);
result[3] = new ResultPoint(previousRowLoc[1], stopRow);
}
if (stopRow - startRow < BARCODE_MIN_HEIGHT) {
for (int i = 0; i < result.Length; i++) {
result[i] = null;
}
}
return result;
}
public ResultPointsAndTransitions(ResultPoint from, ResultPoint to, int transitions)
{
this.from = from;
this.to = to;
this.transitions = transitions;
}
/// <summary>
/// If we adjust the width, set a new right corner coordinate and recalculate
/// </summary>
/// <param name="bottomRight">Bottom right.</param>
internal void SetBottomRight(ResultPoint bottomRight)
{
this.BottomRight = bottomRight;
calculateMinMaxValues();
}
/// <summary>
/// Processes the finder pattern info.
/// </summary>
/// <param name="info">The info.</param>
/// <returns></returns>
protected internal virtual DetectorResult processFinderPatternInfo(FinderPatternInfo info)
{
FinderPattern topLeft = info.TopLeft;
FinderPattern topRight = info.TopRight;
FinderPattern bottomLeft = info.BottomLeft;
float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
if (moduleSize < 1.0f)
{
return null;
}
int dimension;
if (!computeDimension(topLeft, topRight, bottomLeft, moduleSize, out dimension))
return null;
Internal.Version provisionalVersion = Internal.Version.getProvisionalVersionForDimension(dimension);
if (provisionalVersion == null)
return null;
int modulesBetweenFPCenters = provisionalVersion.DimensionForVersion - 7;
AlignmentPattern alignmentPattern = null;
// Anything above version 1 has an alignment pattern
if (provisionalVersion.AlignmentPatternCenters.Length > 0)
{
// Guess where a "bottom right" finder pattern would have been
float bottomRightX = topRight.X - topLeft.X + bottomLeft.X;
float bottomRightY = topRight.Y - topLeft.Y + bottomLeft.Y;
// Estimate that alignment pattern is closer by 3 modules
// from "bottom right" to known top left location
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float correctionToTopLeft = 1.0f - 3.0f / (float)modulesBetweenFPCenters;
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
int estAlignmentX = (int)(topLeft.X + correctionToTopLeft * (bottomRightX - topLeft.X));
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
int estAlignmentY = (int)(topLeft.Y + correctionToTopLeft * (bottomRightY - topLeft.Y));
// Kind of arbitrary -- expand search radius before giving up
for (int i = 4; i <= 16; i <<= 1)
{
alignmentPattern = findAlignmentInRegion(moduleSize, estAlignmentX, estAlignmentY, (float)i);
if (alignmentPattern == null)
continue;
break;
}
// If we didn't find alignment pattern... well try anyway without it
}
PerspectiveTransform transform = createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);
BitMatrix bits = sampleGrid(image, transform, dimension);
if (bits == null)
return null;
ResultPoint[] points;
if (alignmentPattern == null)
{
points = new ResultPoint[] { bottomLeft, topLeft, topRight };
}
else
{
points = new ResultPoint[] { bottomLeft, topLeft, topRight, alignmentPattern };
}
return new DetectorResult(bits, points);
}
/// <summary>
/// Decode the specified image, imageTopLeft, imageBottomLeft, imageTopRight, imageBottomRight, minCodewordWidth
/// and maxCodewordWidth.
/// TODO: don't pass in minCodewordWidth and maxCodewordWidth, pass in barcode columns for start and stop pattern
/// columns. That way width can be deducted from the pattern column.
/// This approach also allows to detect more details about the barcode, e.g. if a bar type (white or black) is wider
/// than it should be. This can happen if the scanner used a bad blackpoint.
/// </summary>
/// <param name="image">Image.</param>
/// <param name="imageTopLeft">Image top left.</param>
/// <param name="imageBottomLeft">Image bottom left.</param>
/// <param name="imageTopRight">Image top right.</param>
/// <param name="imageBottomRight">Image bottom right.</param>
/// <param name="minCodewordWidth">Minimum codeword width.</param>
/// <param name="maxCodewordWidth">Max codeword width.</param>
public static DecoderResult decode(BitMatrix image,
ResultPoint imageTopLeft,
ResultPoint imageBottomLeft,
ResultPoint imageTopRight,
ResultPoint imageBottomRight,
int minCodewordWidth,
int maxCodewordWidth)
{
BoundingBox boundingBox = BoundingBox.Create(image, imageTopLeft, imageBottomLeft, imageTopRight, imageBottomRight);
if (boundingBox == null)
return null;
DetectionResultRowIndicatorColumn leftRowIndicatorColumn = null;
DetectionResultRowIndicatorColumn rightRowIndicatorColumn = null;
DetectionResult detectionResult = null;
for (int i = 0; i < 2; i++)
{
if (imageTopLeft != null)
{
leftRowIndicatorColumn = getRowIndicatorColumn(image, boundingBox, imageTopLeft, true, minCodewordWidth, maxCodewordWidth);
}
if (imageTopRight != null)
{
rightRowIndicatorColumn = getRowIndicatorColumn(image, boundingBox, imageTopRight, false, minCodewordWidth, maxCodewordWidth);
}
detectionResult = merge(leftRowIndicatorColumn, rightRowIndicatorColumn);
if (detectionResult == null)
{
// TODO Based on Owen's Comments in <see cref="ZXing.ReaderException"/>, this method has been modified to continue silently
// if a barcode was not decoded where it was detected instead of throwing a new exception object.
return null;
}
if (i == 0 && detectionResult.Box != null &&
(detectionResult.Box.MinY < boundingBox.MinY || detectionResult.Box.MaxY > boundingBox.MaxY))
{
boundingBox = detectionResult.Box;
}
else
{
detectionResult.Box = boundingBox;
break;
}
}
int maxBarcodeColumn = detectionResult.ColumnCount + 1;
detectionResult.DetectionResultColumns[0] = leftRowIndicatorColumn;
detectionResult.DetectionResultColumns[maxBarcodeColumn] = rightRowIndicatorColumn;
bool leftToRight = leftRowIndicatorColumn != null;
for (int barcodeColumnCount = 1; barcodeColumnCount <= maxBarcodeColumn; barcodeColumnCount++)
{
int barcodeColumn = leftToRight ? barcodeColumnCount : maxBarcodeColumn - barcodeColumnCount;
if (detectionResult.DetectionResultColumns[barcodeColumn] != null)
{
// This will be the case for the opposite row indicator column, which doesn't need to be decoded again.
continue;
}
DetectionResultColumn detectionResultColumn;
if (barcodeColumn == 0 || barcodeColumn == maxBarcodeColumn)
{
detectionResultColumn = new DetectionResultRowIndicatorColumn(boundingBox, barcodeColumn == 0);
}
else
{
detectionResultColumn = new DetectionResultColumn(boundingBox);
}
detectionResult.DetectionResultColumns[barcodeColumn] = detectionResultColumn;
int startColumn = -1;
int previousStartColumn = startColumn;
// TODO start at a row for which we know the start position, then detect upwards and downwards from there.
for (int imageRow = boundingBox.MinY; imageRow <= boundingBox.MaxY; imageRow++)
{
startColumn = getStartColumn(detectionResult, barcodeColumn, imageRow, leftToRight);
if (startColumn < 0 || startColumn > boundingBox.MaxX)
{
if (previousStartColumn == -1)
{
continue;
}
startColumn = previousStartColumn;
}
Codeword codeword = detectCodeword(image, boundingBox.MinX, boundingBox.MaxX, leftToRight,
startColumn, imageRow, minCodewordWidth, maxCodewordWidth);
if (codeword != null)
{
detectionResultColumn.setCodeword(imageRow, codeword);
previousStartColumn = startColumn;
minCodewordWidth = Math.Min(minCodewordWidth, codeword.Width);
maxCodewordWidth = Math.Max(maxCodewordWidth, codeword.Width);
}
}
}
return createDecoderResult(detectionResult);
}
/// <summary>
/// If we adjust the width, set a new right corner coordinate and recalculate
/// </summary>
/// <param name="topRight">Top right.</param>
internal void SetTopRight(ResultPoint topRight)
{
this.TopRight = topRight;
CalculateMinMaxValues();
}
/// <summary>
/// We're going to examine rows from the middle outward, searching alternately above and below the
/// middle, and farther out each time. rowStep is the number of rows between each successive
/// attempt above and below the middle. So we'd scan row middle, then middle - rowStep, then
/// middle + rowStep, then middle - (2 * rowStep), etc.
/// rowStep is bigger as the image is taller, but is always at least 1. We've somewhat arbitrarily
/// decided that moving up and down by about 1/16 of the image is pretty good; we try more of the
/// image if "trying harder".
/// </summary>
/// <param name="image">The image to decode</param>
/// <param name="hints">Any hints that were requested</param>
/// <returns>The contents of the decoded barcode</returns>
virtual protected Result doDecode(BinaryBitmap image, IDictionary<DecodeHintType, object> hints)
{
int width = image.Width;
int height = image.Height;
BitArray row = new BitArray(width);
int middle = height >> 1;
bool tryHarder = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER);
int rowStep = Math.Max(1, height >> (tryHarder ? 8 : 5));
int maxLines;
if (tryHarder)
{
maxLines = height; // Look at the whole image, not just the center
}
else
{
maxLines = 15; // 15 rows spaced 1/32 apart is roughly the middle half of the image
}
for (int x = 0; x < maxLines; x++)
{
// Scanning from the middle out. Determine which row we're looking at next:
int rowStepsAboveOrBelow = (x + 1) >> 1;
bool isAbove = (x & 0x01) == 0; // i.e. is x even?
int rowNumber = middle + rowStep * (isAbove ? rowStepsAboveOrBelow : -rowStepsAboveOrBelow);
if (rowNumber < 0 || rowNumber >= height)
{
// Oops, if we run off the top or bottom, stop
break;
}
// Estimate black point for this row and load it:
row = image.getBlackRow(rowNumber, row);
if (row == null)
continue;
// While we have the image data in a BitArray, it's fairly cheap to reverse it in place to
// handle decoding upside down barcodes.
for (int attempt = 0; attempt < 2; attempt++)
{
if (attempt == 1)
{
// trying again?
row.reverse(); // reverse the row and continue
// This means we will only ever draw result points *once* in the life of this method
// since we want to avoid drawing the wrong points after flipping the row, and,
// don't want to clutter with noise from every single row scan -- just the scans
// that start on the center line.
if (hints != null && hints.ContainsKey(DecodeHintType.NEED_RESULT_POINT_CALLBACK))
{
IDictionary<DecodeHintType, Object> newHints = new Dictionary<DecodeHintType, Object>();
foreach (var hint in hints)
{
if (hint.Key != DecodeHintType.NEED_RESULT_POINT_CALLBACK)
newHints.Add(hint.Key, hint.Value);
}
hints = newHints;
}
}
// Look for a barcode
Result result = decodeRow(rowNumber, row, hints);
if (result == null)
continue;
// We found our barcode
if (attempt == 1)
{
// But it was upside down, so note that
result.putMetadata(ResultMetadataType.ORIENTATION, 180);
// And remember to flip the result points horizontally.
ResultPoint[] points = result.ResultPoints;
if (points != null)
{
points[0] = new ResultPoint(width - points[0].X - 1, points[0].Y);
points[1] = new ResultPoint(width - points[1].X - 1, points[1].Y);
}
}
return result;
}
}
return null;
}
/// <summary>
/// Copies the temp data to the final result
/// </summary>
/// <param name="result">Result.</param>
/// <param name="tmpResult">Temp result.</param>
/// <param name="destinationIndexes">Destination indexes.</param>
private static void CopyToResult(ResultPoint[] result, ResultPoint[] tmpResult, int[] destinationIndexes) {
for (int i = 0; i < destinationIndexes.Length; i++) {
result[destinationIndexes[i]] = tmpResult[i];
}
}
/**
* <p>Detects a Data Matrix Code in an image.</p>
*
* @return {@link DetectorResult} encapsulating results of detecting a QR Code
* @throws ReaderException if no Data Matrix Code can be found
*/
public DetectorResult detect()
{
if (!BlackPointEstimationMethod.TWO_D_SAMPLING.Equals(image.getLastEstimationMethod()))
{
image.estimateBlackPoint(BlackPointEstimationMethod.TWO_D_SAMPLING, 0);
}
int height = image.getHeight();
int width = image.getWidth();
int halfHeight = height >> 1;
int halfWidth = width >> 1;
int iSkip = Math.Max(1, height / (MAX_MODULES << 3));
int jSkip = Math.Max(1, width / (MAX_MODULES << 3));
int minI = 0;
int maxI = height;
int minJ = 0;
int maxJ = width;
ResultPoint pointA = findCornerFromCenter(halfHeight, -iSkip, minI, maxI, halfWidth, 0, minJ, maxJ, halfWidth >> 1);
minI = (int)pointA.getY() - 1;
ResultPoint pointB = findCornerFromCenter(halfHeight, 0, minI, maxI, halfWidth, -jSkip, minJ, maxJ, halfHeight >> 1);
minJ = (int)pointB.getX() - 1;
ResultPoint pointC = findCornerFromCenter(halfHeight, 0, minI, maxI, halfWidth, jSkip, minJ, maxJ, halfHeight >> 1);
maxJ = (int)pointC.getX() + 1;
ResultPoint pointD = findCornerFromCenter(halfHeight, iSkip, minI, maxI, halfWidth, 0, minJ, maxJ, halfWidth >> 1);
maxI = (int)pointD.getY() + 1;
// Go try to find point A again with better information -- might have been off at first.
pointA = findCornerFromCenter(halfHeight, -iSkip, minI, maxI, halfWidth, 0, minJ, maxJ, halfWidth >> 2);
// Point A and D are across the diagonal from one another,
// as are B and C. Figure out which are the solid black lines
// by counting transitions
System.Collections.ArrayList transitions = new System.Collections.ArrayList(4);
transitions.Add(transitionsBetween(pointA, pointB));
transitions.Add(transitionsBetween(pointA, pointC));
transitions.Add(transitionsBetween(pointB, pointD));
transitions.Add(transitionsBetween(pointC, pointD));
Collections.insertionSort(transitions, new ResultPointsAndTransitionsComparator());
// Sort by number of transitions. First two will be the two solid sides; last two
// will be the two alternating black/white sides
ResultPointsAndTransitions lSideOne = (ResultPointsAndTransitions)transitions[0];
ResultPointsAndTransitions lSideTwo = (ResultPointsAndTransitions)transitions[1];
// Figure out which point is their intersection by tallying up the number of times we see the
// endpoints in the four endpoints. One will show up twice.
System.Collections.Hashtable pointCount = new System.Collections.Hashtable();
increment(pointCount, lSideOne.getFrom());
increment(pointCount, lSideOne.getTo());
increment(pointCount, lSideTwo.getFrom());
increment(pointCount, lSideTwo.getTo());
ResultPoint maybeTopLeft = null;
ResultPoint bottomLeft = null;
ResultPoint maybeBottomRight = null;
System.Collections.IEnumerator points = pointCount.GetEnumerator();
while (points.MoveNext())
{
ResultPoint point = (ResultPoint)points.Current;
int value = (int)pointCount[point];
if (value == 2)
{
bottomLeft = point; // this is definitely the bottom left, then -- end of two L sides
}
else
{
// Otherwise it's either top left or bottom right -- just assign the two arbitrarily now
if (maybeTopLeft == null)
{
maybeTopLeft = point;
}
else
{
maybeBottomRight = point;
}
}
}
if (maybeTopLeft == null || bottomLeft == null || maybeBottomRight == null)
{
throw new ReaderException();
}
// Bottom left is correct but top left and bottom right might be switched
ResultPoint[] corners = { maybeTopLeft, bottomLeft, maybeBottomRight };
// Use the dot product trick to sort them out
GenericResultPoint.orderBestPatterns(corners);
// Now we know which is which:
ResultPoint bottomRight = corners[0];
bottomLeft = corners[1];
ResultPoint topLeft = corners[2];
// Which point didn't we find in relation to the "L" sides? that's the top right corner
ResultPoint topRight;
if (!pointCount.ContainsKey(pointA))
{
topRight = pointA;
}
else if (!pointCount.ContainsKey(pointB))
{
topRight = pointB;
}
else if (!pointCount.ContainsKey(pointC))
{
topRight = pointC;
}
else
{
topRight = pointD;
}
// Next determine the dimension by tracing along the top or right side and counting black/white
// transitions. Since we start inside a black module, we should see a number of transitions
// equal to 1 less than the code dimension. Well, actually 2 less, because we are going to
// end on a black module:
// The top right point is actually the corner of a module, which is one of the two black modules
// adjacent to the white module at the top right. Tracing to that corner from either the top left
// or bottom right should work here, but, one will be more reliable since it's traced straight
// up or across, rather than at a slight angle. We use dot products to figure out which is
// better to use:
int dimension;
if (GenericResultPoint.crossProductZ(bottomLeft, bottomRight, topRight) <
GenericResultPoint.crossProductZ(topRight, topLeft, bottomLeft))
{
dimension = transitionsBetween(topLeft, topRight).getTransitions();
}
else
{
dimension = transitionsBetween(bottomRight, topRight).getTransitions();
}
dimension += 2;
BitMatrix bits = sampleGrid(image, topLeft, bottomLeft, bottomRight, dimension);
return(new DetectorResult(bits, new ResultPoint[] { pointA, pointB, pointC, pointD }));
}
/// <summary>
/// Locates and decodes a barcode in some format within an image. This method also accepts
/// hints, each possibly associated to some data, which may help the implementation decode.
/// Note that we don't try rotation without the try harder flag, even if rotation was supported.
/// </summary>
/// <param name="image">image of barcode to decode</param>
/// <param name="hints">passed as a <see cref="IDictionary{TKey, TValue}"/> from <see cref="DecodeHintType"/>
/// to arbitrary data. The
/// meaning of the data depends upon the hint type. The implementation may or may not do
/// anything with these hints.</param>
/// <returns>
/// String which the barcode encodes
/// </returns>
virtual public Result decode(BinaryBitmap image, IDictionary<DecodeHintType, object> hints)
{
var result = doDecode(image, hints);
if (result == null)
{
bool tryHarder = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER);
bool tryHarderWithoutRotation = hints != null && hints.ContainsKey(DecodeHintType.TRY_HARDER_WITHOUT_ROTATION);
if (tryHarder && !tryHarderWithoutRotation && image.RotateSupported)
{
BinaryBitmap rotatedImage = image.rotateCounterClockwise();
result = doDecode(rotatedImage, hints);
if (result == null)
return null;
// Record that we found it rotated 90 degrees CCW / 270 degrees CW
IDictionary<ResultMetadataType, object> metadata = result.ResultMetadata;
int orientation = 270;
if (metadata != null && metadata.ContainsKey(ResultMetadataType.ORIENTATION))
{
// But if we found it reversed in doDecode(), add in that result here:
orientation = (orientation +
(int) metadata[ResultMetadataType.ORIENTATION])%360;
}
result.putMetadata(ResultMetadataType.ORIENTATION, orientation);
// Update result points
ResultPoint[] points = result.ResultPoints;
if (points != null)
{
int height = rotatedImage.Height;
for (int i = 0; i < points.Length; i++)
{
points[i] = new ResultPoint(height - points[i].Y - 1, points[i].X);
}
}
}
}
return result;
}
