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A new constant in adaptivethreshold is created to calculate

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gaussianBlur with CV_32F. hence rouding error are avoided
This commit is contained in:
LaurentBerger
2015-06-22 22:21:30 +02:00
parent 945aa06f58
commit 56b2b450ce
2 changed files with 14 additions and 4 deletions
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14
modules/imgproc/src/thresh.cpp
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@@ -1295,11 +1295,19 @@ void cv::adaptiveThreshold( InputArray _src, OutputArray _dst, double maxValue,
if( src.data != dst.data )
mean = dst;
if( method == ADAPTIVE_THRESH_MEAN_C )
if (method == ADAPTIVE_THRESH_MEAN_C)
boxFilter( src, mean, src.type(), Size(blockSize, blockSize),
Point(-1,-1), true, BORDER_REPLICATE );
else if( method == ADAPTIVE_THRESH_GAUSSIAN_C )
GaussianBlur( src, mean, Size(blockSize, blockSize), 0, 0, BORDER_REPLICATE );
else if (method == ADAPTIVE_THRESH_GAUSSIAN_C)
GaussianBlur(src, mean, Size(blockSize, blockSize), 0, 0, BORDER_REPLICATE);
else if (method == ADAPTIVE_THRESH_GAUSSIAN_C_FLOAT)
{
Mat srcfloat,meanfloat;
src.convertTo(srcfloat,CV_32F);
meanfloat=srcfloat;
GaussianBlur(srcfloat, meanfloat, Size(blockSize, blockSize), 0, 0, BORDER_REPLICATE);
meanfloat.convertTo(dst, src.type());
}
else
CV_Error( CV_StsBadFlag, "Unknown/unsupported adaptive threshold method" );