Ref<AlignmentPattern> Detector::findAlignmentInRegion(float overallEstModuleSize, int estAlignmentX, int estAlignmentY,
float allowanceFactor) {
// Look for an alignment pattern (3 modules in size) around where it
// should be
int allowance = (int)(allowanceFactor * overallEstModuleSize);
int alignmentAreaLeftX = max(0, estAlignmentX - allowance);
int alignmentAreaRightX = min((int)(image_->getWidth() - 1), estAlignmentX + allowance);
if (alignmentAreaRightX - alignmentAreaLeftX < overallEstModuleSize * 3) {
throw zxing::ReaderException("region too small to hold alignment pattern");
}
int alignmentAreaTopY = max(0, estAlignmentY - allowance);
int alignmentAreaBottomY = min((int)(image_->getHeight() - 1), estAlignmentY + allowance);
if (alignmentAreaBottomY - alignmentAreaTopY < overallEstModuleSize * 3) {
throw zxing::ReaderException("region too small to hold alignment pattern");
}
AlignmentPatternFinder alignmentFinder(image_, alignmentAreaLeftX, alignmentAreaTopY, alignmentAreaRightX
- alignmentAreaLeftX, alignmentAreaBottomY - alignmentAreaTopY, overallEstModuleSize, callback_);
return alignmentFinder.find();
}
Ref<AlignmentPattern>
Detector::findAlignmentInRegion(float overallEstModuleSize,
int estAlignmentX,
int estAlignmentY,
float allowanceFactor) {
// Look for an alignment pattern (3 modules in size) around where it
// should be
int allowance = (int) (allowanceFactor * overallEstModuleSize);
int alignmentAreaLeftX = max(0, estAlignmentX - allowance);
int alignmentAreaRightX = min((int) (image_->getWidth() - 1),
estAlignmentX + allowance);
int alignmentAreaTopY = max(0, estAlignmentY - allowance);
int alignmentAreaBottomY = min((int) (image_->getHeight() - 1),
estAlignmentY + allowance);
AlignmentPatternFinder
alignmentFinder(image_,
alignmentAreaLeftX,
alignmentAreaTopY,
alignmentAreaRightX - alignmentAreaLeftX,
alignmentAreaBottomY - alignmentAreaTopY,
overallEstModuleSize);
return alignmentFinder.find();
}