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Should fix problems decoding tiny QR codes without any alignment pattern

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git-svn-id: https://zxing.googlecode.com/svn/trunk@63 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen 2007-11-20 18:51:40 +00:00
parent a164858fe4
commit b53b6f27cc
1 changed files with 7 additions and 5 deletions
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12
core/src/com/google/zxing/qrcode/detector/DefaultGridSampler.java
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@ -31,25 +31,27 @@ public final class DefaultGridSampler extends GridSampler {
FinderPattern bottomLeft, FinderPattern bottomLeft,
AlignmentPattern alignmentPattern, AlignmentPattern alignmentPattern,
int dimension) throws ReaderException { int dimension) throws ReaderException {
float bottomRightX; float dimMinusThree = (float) dimension - 3.5f;
float bottomRightY; float bottomRightX, bottomRightY;
float sourceBottomRightX, sourceBottomRightY;
if (alignmentPattern != null) { if (alignmentPattern != null) {
bottomRightX = alignmentPattern.getX(); bottomRightX = alignmentPattern.getX();
bottomRightY = alignmentPattern.getY(); bottomRightY = alignmentPattern.getY();
sourceBottomRightX = sourceBottomRightY = dimMinusThree - 3.0f;
} else { } else {
// Don't have an alignment pattern, just make up the bottom-right point // Don't have an alignment pattern, just make up the bottom-right point
bottomRightX = (topRight.getX() - topLeft.getX()) + bottomLeft.getX(); bottomRightX = (topRight.getX() - topLeft.getX()) + bottomLeft.getX();
bottomRightY = (topRight.getY() - topLeft.getY()) + bottomLeft.getY(); bottomRightY = (topRight.getY() - topLeft.getY()) + bottomLeft.getY();
sourceBottomRightX = sourceBottomRightY = dimMinusThree;
} }
float dimMinusThree = (float) dimension - 3.5f;
PerspectiveTransform transform = PerspectiveTransform.quadrilateralToQuadrilateral( PerspectiveTransform transform = PerspectiveTransform.quadrilateralToQuadrilateral(
3.5f, 3.5f,
3.5f, 3.5f,
dimMinusThree, dimMinusThree,
3.5f, 3.5f,
dimMinusThree - 3.0f, sourceBottomRightX,
dimMinusThree - 3.0f, sourceBottomRightY,
3.5f, 3.5f,
dimMinusThree, dimMinusThree,
topLeft.getX(), topLeft.getX(),