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Fixed bilateral filter's sigma color and sigma space issue

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This commit is contained in:
Abhishek Gola 2025-05-14 14:22:05 +05:30
parent 868fc5c581
commit 838babe351
3 changed files with 39 additions and 22 deletions
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10
hal/ndsrvp/src/bilateralFilter.cpp
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@ -156,10 +156,12 @@ int bilateralFilter(const uchar* src_data, size_t src_step,
int i, j, maxk, radius;
if( sigma_color <= 0 )
sigma_color = 1;
if( sigma_space <= 0 )
sigma_space = 1;
constexpr double eps = 1e-6;
if( sigma_color <= eps || sigma_space <= eps )
{
src.copyTo(dst);
return CV_HAL_ERROR_OK;
}
double gauss_color_coeff = -0.5/(sigma_color * sigma_color);
double gauss_space_coeff = -0.5/(sigma_space * sigma_space);

41
modules/imgproc/src/bilateral_filter.dispatch.cpp
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@ -75,10 +75,12 @@ static bool ocl_bilateralFilter_8u(InputArray _src, OutputArray _dst, int d,
if (depth != CV_8U || cn > 4)
return false;
if (sigma_color <= 0)
sigma_color = 1;
if (sigma_space <= 0)
sigma_space = 1;
constexpr double eps = 1e-6;
if( sigma_color <= eps || sigma_space <= eps )
{
_src.copyTo(_dst);
return true;
}
double gauss_color_coeff = -0.5 / (sigma_color * sigma_color);
double gauss_space_coeff = -0.5 / (sigma_space * sigma_space);
@ -165,10 +167,12 @@ bilateralFilter_8u( const Mat& src, Mat& dst, int d,
CV_Assert( (src.type() == CV_8UC1 || src.type() == CV_8UC3) && src.data != dst.data );
if( sigma_color <= 0 )
sigma_color = 1;
if( sigma_space <= 0 )
sigma_space = 1;
constexpr double eps = 1e-6;
if( sigma_color <= eps || sigma_space <= eps )
{
src.copyTo(dst);
return;
}
double gauss_color_coeff = -0.5/(sigma_color*sigma_color);
double gauss_space_coeff = -0.5/(sigma_space*sigma_space);
@ -232,10 +236,12 @@ bilateralFilter_32f( const Mat& src, Mat& dst, int d,
CV_Assert( (src.type() == CV_32FC1 || src.type() == CV_32FC3) && src.data != dst.data );
if( sigma_color <= 0 )
sigma_color = 1;
if( sigma_space <= 0 )
sigma_space = 1;
constexpr double eps = 1e-6;
if( sigma_color <= eps || sigma_space <= eps )
{
src.copyTo(dst);
return;
}
double gauss_color_coeff = -0.5/(sigma_color*sigma_color);
double gauss_space_coeff = -0.5/(sigma_space*sigma_space);
@ -358,9 +364,16 @@ static bool ipp_bilateralFilter(Mat &src, Mat &dst, int d, double sigmaColor, do
#ifdef HAVE_IPP_IW
CV_INSTRUMENT_REGION_IPP();
constexpr double eps = 1e-6;
if( sigmaColor <= eps || sigmaSpace <= eps )
{
src.copyTo(dst);
return true;
}
int radius = IPP_MAX(((d <= 0)?cvRound(sigmaSpace*1.5):d/2), 1);
Ipp32f valSquareSigma = (Ipp32f)((sigmaColor <= 0)?1:sigmaColor*sigmaColor);
Ipp32f posSquareSigma = (Ipp32f)((sigmaSpace <= 0)?1:sigmaSpace*sigmaSpace);
Ipp32f valSquareSigma = (Ipp32f)(sigmaColor*sigmaColor);
Ipp32f posSquareSigma = (Ipp32f)(sigmaSpace*sigmaSpace);
// Acquire data and begin processing
try

10
modules/imgproc/test/test_bilateral_filter.cpp
View File

@ -110,10 +110,12 @@ namespace opencv_test { namespace {
src.type() == dst.type() && src.size() == dst.size() &&
src.data != dst.data );
if( sigma_color <= 0 )
sigma_color = 1;
if( sigma_space <= 0 )
sigma_space = 1;
constexpr double eps = 1e-6;
if( sigma_color <= eps || sigma_space <= eps )
{
src.copyTo(dst);
return;
}
double gauss_color_coeff = -0.5/(sigma_color*sigma_color);
double gauss_space_coeff = -0.5/(sigma_space*sigma_space);