public Result decode(BinaryBitmap image, System.Collections.Hashtable hints)
{
DecoderResult decoderResult;
ResultPoint[] points;
if (hints != null && hints.ContainsKey(DecodeHintType.PURE_BARCODE))
{
BitMatrix bits = extractPureBits(image.BlackMatrix);
decoderResult = decoder.decode(bits);
points = NO_POINTS;
}
else
{
DetectorResult detectorResult = new Detector(image.BlackMatrix).detect();
decoderResult = decoder.decode(detectorResult.Bits);
points = detectorResult.Points;
}
Result result = new Result(decoderResult.Text, decoderResult.RawBytes, points, BarcodeFormat.DATAMATRIX);
if (decoderResult.ByteSegments != null)
{
result.putMetadata(ResultMetadataType.BYTE_SEGMENTS, decoderResult.ByteSegments);
}
if (decoderResult.ECLevel != null)
{
result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, decoderResult.ECLevel.ToString());
}
return result;
}
public Result decode(BinaryBitmap image, System.Collections.Hashtable hints)
{
int width = image.Width;
int height = image.Height;
int halfWidth = width / 2;
int halfHeight = height / 2;
BinaryBitmap topLeft = image.crop(0, 0, halfWidth, halfHeight);
try
{
return delegate_Renamed.decode(topLeft, hints);
}
catch (ReaderException)
{
// continue
}
BinaryBitmap topRight = image.crop(halfWidth, 0, halfWidth, halfHeight);
try
{
return delegate_Renamed.decode(topRight, hints);
}
catch (ReaderException)
{
// continue
}
BinaryBitmap bottomLeft = image.crop(0, halfHeight, halfWidth, halfHeight);
try
{
return delegate_Renamed.decode(bottomLeft, hints);
}
catch (ReaderException)
{
// continue
}
BinaryBitmap bottomRight = image.crop(halfWidth, halfHeight, halfWidth, halfHeight);
try
{
return delegate_Renamed.decode(bottomRight, hints);
}
catch (ReaderException)
{
// continue
}
int quarterWidth = halfWidth / 2;
int quarterHeight = halfHeight / 2;
BinaryBitmap center = image.crop(quarterWidth, quarterHeight, halfWidth, halfHeight);
return delegate_Renamed.decode(center, hints);
}
public Result[] decodeMultiple(BinaryBitmap image, System.Collections.Hashtable hints)
{
System.Collections.ArrayList results = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
doDecodeMultiple(image, hints, results, 0, 0);
if ((results.Count == 0))
{
throw ReaderException.Instance;
}
int numResults = results.Count;
Result[] resultArray = new Result[numResults];
for (int i = 0; i < numResults; i++)
{
resultArray[i] = (Result) results[i];
}
return resultArray;
}
public Result decode(BinaryBitmap image, System.Collections.Hashtable hints)
{
DecoderResult decoderResult;
ResultPoint[] points;
if (hints != null && hints.ContainsKey(DecodeHintType.PURE_BARCODE))
{
BitMatrix bits = extractPureBits(image);
decoderResult = decoder.decode(bits);
points = NO_POINTS;
}
else
{
DetectorResult detectorResult = new Detector(image).detect();
decoderResult = decoder.decode(detectorResult.Bits);
points = detectorResult.Points;
}
return new Result(decoderResult.Text, decoderResult.RawBytes, points, BarcodeFormat.PDF417);
}
public Result[] decodeMultiple(BinaryBitmap image, System.Collections.Hashtable hints)
{
System.Collections.ArrayList results = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));
DetectorResult[] detectorResult = new MultiDetector(image.BlackMatrix).detectMulti(hints);
for (int i = 0; i < detectorResult.Length; i++)
{
try
{
DecoderResult decoderResult = Decoder.decode(detectorResult[i].Bits);
ResultPoint[] points = detectorResult[i].Points;
Result result = new Result(decoderResult.Text, decoderResult.RawBytes, points, BarcodeFormat.QR_CODE);
if (decoderResult.ByteSegments != null)
{
result.putMetadata(ResultMetadataType.BYTE_SEGMENTS, decoderResult.ByteSegments);
}
if (decoderResult.ECLevel != null)
{
result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, decoderResult.ECLevel.ToString());
}
results.Add(result);
}
catch (ReaderException)
{
// ignore and continue
}
}
if ((results.Count == 0))
{
return EMPTY_RESULT_ARRAY;
}
else
{
Result[] resultArray = new Result[results.Count];
for (int i = 0; i < results.Count; i++)
{
resultArray[i] = (Result) results[i];
}
return resultArray;
}
}
// 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;
}
}
}
/// <summary> Locates and decodes a Data Matrix code in an image.
///
/// </summary>
/// <returns> a String representing the content encoded by the Data Matrix code
/// </returns>
/// <throws> ReaderException if a Data Matrix code cannot be found, or cannot be decoded </throws>
public Result decode(BinaryBitmap image)
{
return decode(image, null);
}
/// <summary> This method detects a barcode in a "pure" image -- that is, pure monochrome image
/// which contains only an unrotated, unskewed, image of a barcode, with some white border
/// around it. This is a specialized method that works exceptionally fast in this special
/// case.
/// </summary>
private static BitMatrix extractPureBits(BinaryBitmap image)
{
// Now need to determine module size in pixels
BitMatrix matrix = image.BlackMatrix;
int height = matrix.Height;
int width = matrix.Width;
int minDimension = System.Math.Min(height, width);
// First, skip white border by tracking diagonally from the top left down and to the right:
int borderWidth = 0;
while (borderWidth < minDimension && !matrix.get_Renamed(borderWidth, borderWidth))
{
borderWidth++;
}
if (borderWidth == minDimension)
{
throw ReaderException.Instance;
}
// And then keep tracking across the top-left black module to determine module size
int moduleEnd = borderWidth;
while (moduleEnd < minDimension && matrix.get_Renamed(moduleEnd, moduleEnd))
{
moduleEnd++;
}
if (moduleEnd == minDimension)
{
throw ReaderException.Instance;
}
int moduleSize = moduleEnd - borderWidth;
// And now find where the rightmost black module on the first row ends
int rowEndOfSymbol = width - 1;
while (rowEndOfSymbol >= 0 && !matrix.get_Renamed(rowEndOfSymbol, borderWidth))
{
rowEndOfSymbol--;
}
if (rowEndOfSymbol < 0)
{
throw ReaderException.Instance;
}
rowEndOfSymbol++;
// Make sure width of barcode is a multiple of module size
if ((rowEndOfSymbol - borderWidth) % moduleSize != 0)
{
throw ReaderException.Instance;
}
int dimension = (rowEndOfSymbol - borderWidth) / moduleSize;
// Push in the "border" by half the module width so that we start
// sampling in the middle of the module. Just in case the image is a
// little off, this will help recover.
borderWidth += (moduleSize >> 1);
int sampleDimension = borderWidth + (dimension - 1) * moduleSize;
if (sampleDimension >= width || sampleDimension >= height)
{
throw ReaderException.Instance;
}
// Now just read off the bits
BitMatrix bits = new BitMatrix(dimension);
for (int y = 0; y < dimension; y++)
{
int iOffset = borderWidth + y * moduleSize;
for (int x = 0; x < dimension; x++)
{
if (matrix.get_Renamed(borderWidth + x * moduleSize, iOffset))
{
bits.set_Renamed(x, y);
}
}
}
return bits;
}
public Result[] decodeMultiple(BinaryBitmap image)
{
return decodeMultiple(image, null);
}
private void doDecodeMultiple(BinaryBitmap image, System.Collections.Hashtable hints, System.Collections.ArrayList results, int xOffset, int yOffset)
{
Result result;
try
{
result = delegate_Renamed.decode(image, hints);
}
catch (ReaderException)
{
return ;
}
bool alreadyFound = false;
for (int i = 0; i < results.Count; i++)
{
Result existingResult = (Result) results[i];
if (existingResult.Text.Equals(result.Text))
{
alreadyFound = true;
break;
}
}
if (alreadyFound)
{
return ;
}
results.Add(translateResultPoints(result, xOffset, yOffset));
ResultPoint[] resultPoints = result.ResultPoints;
if (resultPoints == null || resultPoints.Length == 0)
{
return ;
}
int width = image.Width;
int height = image.Height;
float minX = width;
float minY = height;
float maxX = 0.0f;
float maxY = 0.0f;
for (int i = 0; i < resultPoints.Length; i++)
{
ResultPoint point = resultPoints[i];
float x = point.X;
float y = point.Y;
if (x < minX)
{
minX = x;
}
if (y < minY)
{
minY = y;
}
if (x > maxX)
{
maxX = x;
}
if (y > maxY)
{
maxY = y;
}
}
// Decode left of barcode
if (minX > MIN_DIMENSION_TO_RECUR)
{
//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'"
doDecodeMultiple(image.crop(0, 0, (int) minX, height), hints, results, xOffset, yOffset);
}
// Decode above barcode
if (minY > MIN_DIMENSION_TO_RECUR)
{
//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'"
doDecodeMultiple(image.crop(0, 0, width, (int) minY), hints, results, xOffset, yOffset);
}
// Decode right of barcode
if (maxX < width - MIN_DIMENSION_TO_RECUR)
{
//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'"
doDecodeMultiple(image.crop((int) maxX, 0, width - (int) maxX, height), hints, results, xOffset + (int) maxX, yOffset);
}
// Decode below barcode
if (maxY < height - MIN_DIMENSION_TO_RECUR)
{
//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'"
doDecodeMultiple(image.crop(0, (int) maxY, width, height - (int) maxY), hints, results, xOffset, yOffset + (int) maxY);
}
}
public Detector(BinaryBitmap image)
{
this.image = image;
}
/// <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>
/// <throws> ReaderException Any spontaneous errors which occur </throws>
private Result doDecode(BinaryBitmap image, System.Collections.Hashtable 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 = System.Math.Max(1, height >> (tryHarder?7:4));
int maxLines;
if (tryHarder)
{
maxLines = height; // Look at the whole image, not just the center
}
else
{
maxLines = 9; // Nine rows spaced 1/16 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:
try
{
row = image.getBlackRow(rowNumber, row);
}
catch (ReaderException)
{
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))
{
System.Collections.Hashtable newHints = System.Collections.Hashtable.Synchronized(new System.Collections.Hashtable()); // Can't use clone() in J2ME
System.Collections.IEnumerator hintEnum = hints.Keys.GetEnumerator();
//UPGRADE_TODO: Method 'java.util.Enumeration.hasMoreElements' was converted to 'System.Collections.IEnumerator.MoveNext' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javautilEnumerationhasMoreElements'"
while (hintEnum.MoveNext())
{
//UPGRADE_TODO: Method 'java.util.Enumeration.nextElement' was converted to 'System.Collections.IEnumerator.Current' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javautilEnumerationnextElement'"
System.Object key = hintEnum.Current;
if (!key.Equals(DecodeHintType.NEED_RESULT_POINT_CALLBACK))
{
newHints[key] = hints[key];
}
}
hints = newHints;
}
}
try
{
// Look for a barcode
Result result = decodeRow(rowNumber, row, hints);
// We found our barcode
if (attempt == 1)
{
// But it was upside down, so note that
result.putMetadata(ResultMetadataType.ORIENTATION, (System.Object) 180);
// And remember to flip the result points horizontally.
ResultPoint[] points = result.ResultPoints;
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;
}
catch (ReaderException)
{
// continue -- just couldn't decode this row
}
}
}
throw ReaderException.Instance;
}
