private static BitMatrix sampleGrid(BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint bottomRight,
ResultPoint topRight,
int dimensionX,
int dimensionY)
{
GridSampler sampler = GridSampler.Instance;
return(sampler.sampleGrid(image,
dimensionX,
dimensionY,
0.5f,
0.5f,
dimensionX - 0.5f,
0.5f,
dimensionX - 0.5f,
dimensionY - 0.5f,
0.5f,
dimensionY - 0.5f,
topLeft.X,
topLeft.Y,
topRight.X,
topRight.Y,
bottomRight.X,
bottomRight.Y,
bottomLeft.X,
bottomLeft.Y));
}
private static BitMatrix sampleGrid(BitMatrix matrix,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint topRight,
ResultPoint bottomRight,
int xdimension,
int ydimension)
{
// Note that unlike 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(
matrix,
xdimension, ydimension,
0.0f, // p1ToX
0.0f, // p1ToY
xdimension, // p2ToX
0.0f, // p2ToY
xdimension, // p3ToX
ydimension, // p3ToY
0.0f, // p4ToX
ydimension, // p4ToY
topLeft.X, // p1FromX
topLeft.Y, // p1FromY
topRight.X, // p2FromX
topRight.Y, // p2FromY
bottomRight.X, // p3FromX
bottomRight.Y, // p3FromY
bottomLeft.X, // p4FromX
bottomLeft.Y)); // p4FromY
}
/// <summary> Sets the implementation of <see cref="GridSampler"/> used by the library. One global
/// instance is stored, which may sound problematic. But, the implementation provided
/// ought to be appropriate for the entire platform, and all uses of this library
/// in the whole lifetime of the JVM. For instance, an Android activity can swap in
/// an implementation that takes advantage of native platform libraries.
/// </summary>
/// <param name="newGridSampler">The platform-specific object to install.</param>
public static void setGridSampler(GridSampler newGridSampler)
{
if (newGridSampler == null)
{
throw new System.ArgumentException();
}
gridSampler = newGridSampler;
}
/// <summary> Sets the implementation of <see cref="GridSampler"/> used by the library. One global
/// instance is stored, which may sound problematic. But, the implementation provided
/// ought to be appropriate for the entire platform, and all uses of this library
/// in the whole lifetime of the JVM. For instance, an Android activity can swap in
/// an implementation that takes advantage of native platform libraries.
/// </summary>
/// <param name="newGridSampler">The platform-specific object to install.</param>
public static void setGridSampler(GridSampler newGridSampler)
{
if (newGridSampler == null)
{
throw new System.ArgumentException();
}
gridSampler = newGridSampler;
}
private static BitMatrix sampleGrid(MonochromeBitmapSource image,
ResultPoint topLeft,
ResultPoint topRight,
ResultPoint bottomLeft,
ResultPoint alignmentPattern,
int dimension)
{
float dimMinusThree = (float)dimension - 3.5f;
float bottomRightX;
float bottomRightY;
float sourceBottomRightX;
float sourceBottomRightY;
if (alignmentPattern != null)
{
bottomRightX = alignmentPattern.getX();
bottomRightY = alignmentPattern.getY();
sourceBottomRightX = sourceBottomRightY = dimMinusThree - 3.0f;
}
else
{
// Don't have an alignment pattern, just make up the bottom-right point
bottomRightX = (topRight.getX() - topLeft.getX()) + bottomLeft.getX();
bottomRightY = (topRight.getY() - topLeft.getY()) + bottomLeft.getY();
sourceBottomRightX = sourceBottomRightY = dimMinusThree;
}
GridSampler sampler = GridSampler.Instance;
return(sampler.sampleGrid(
image,
dimension,
3.5f,
3.5f,
dimMinusThree,
3.5f,
sourceBottomRightX,
sourceBottomRightY,
3.5f,
dimMinusThree,
topLeft.getX(),
topLeft.getY(),
topRight.getX(),
topRight.getY(),
bottomRightX,
bottomRightY,
bottomLeft.getX(),
bottomLeft.getY()));
}
/// <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));
}
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));
}
private static BitMatrix sampleGrid(BitMatrix image, PerspectiveTransform transform, int dimension)
{
GridSampler sampler = GridSampler.Instance;
return(sampler.sampleGrid(image, dimension, dimension, transform));
}
/// <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);
}
if (!ComputeDimension(topLeft, topRight, bottomLeft, moduleSize, out int dimension))
{
return(null);
}
Version provisionalVersion = 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 = GridSampler.SampleGrid(image, dimension, dimension, transform);
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));
}
