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#2992: update after review

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This commit is contained in:
Sergei Nikulov 2014-07-30 00:03:41 +04:00
parent 9d107fb2d5
commit eaec132091
3 changed files with 45 additions and 30 deletions
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22
modules/imgcodecs/include/opencv2/imgcodecs.hpp
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@ -56,17 +56,17 @@ enum { IMREAD_UNCHANGED = -1, // 8bit, color or not
IMREAD_ANYCOLOR = 4 // ?, any color
};
enum { IMWRITE_JPEG_QUALITY = 1,
IMWRITE_JPEG_PROGRESSIVE = 2,
IMWRITE_JPEG_OPTIMIZE = 3,
IMWRITE_JPEG_RST_INTERVAL = 4,
IMWRITE_JPEG_LUM_QUALITY = 5,
IMWRITE_JPEG_CHROM_QUALITY = 6,
IMWRITE_PNG_COMPRESSION = 16,
IMWRITE_PNG_STRATEGY = 17,
IMWRITE_PNG_BILEVEL = 18,
IMWRITE_PXM_BINARY = 32,
IMWRITE_WEBP_QUALITY = 64
enum { IMWRITE_JPEG_QUALITY = 1,
IMWRITE_JPEG_PROGRESSIVE = 2,
IMWRITE_JPEG_OPTIMIZE = 3,
IMWRITE_JPEG_RST_INTERVAL = 4,
IMWRITE_JPEG_LUMA_QUALITY = 5,
IMWRITE_JPEG_CHROMA_QUALITY = 6,
IMWRITE_PNG_COMPRESSION = 16,
IMWRITE_PNG_STRATEGY = 17,
IMWRITE_PNG_BILEVEL = 18,
IMWRITE_PXM_BINARY = 32,
IMWRITE_WEBP_QUALITY = 64
};
enum { IMWRITE_PNG_STRATEGY_DEFAULT = 0,

4
modules/imgcodecs/include/opencv2/imgcodecs/imgcodecs_c.h
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@ -77,8 +77,8 @@ enum
CV_IMWRITE_JPEG_PROGRESSIVE =2,
CV_IMWRITE_JPEG_OPTIMIZE =3,
CV_IMWRITE_JPEG_RST_INTERVAL =4,
CV_IMWRITE_JPEG_LUM_QUALITY =5,
CV_IMWRITE_JPEG_CHROM_QUALITY =6,
CV_IMWRITE_JPEG_LUMA_QUALITY =5,
CV_IMWRITE_JPEG_CHROMA_QUALITY =6,
CV_IMWRITE_PNG_COMPRESSION =16,
CV_IMWRITE_PNG_STRATEGY =17,
CV_IMWRITE_PNG_BILEVEL =18,

49
modules/imgcodecs/src/grfmt_jpeg.cpp
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@ -601,8 +601,8 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
int progressive = 0;
int optimize = 0;
int rst_interval = 0;
int lum_quality = 100;
int chrom_quality = 100;
int luma_quality = -1;
int chroma_quality = -1;
for( size_t i = 0; i < params.size(); i += 2 )
{
@ -622,16 +622,27 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
optimize = params[i+1];
}
if( params[i] == CV_IMWRITE_JPEG_LUM_QUALITY )
if( params[i] == CV_IMWRITE_JPEG_LUMA_QUALITY )
{
lum_quality = params[i+1];
lum_quality = MIN(MAX(lum_quality, 0), 100);
if (params[i+1] >= 0)
{
luma_quality = MIN(MAX(params[i+1], 0), 100);
quality = luma_quality;
if (chroma_quality < 0)
{
chroma_quality = luma_quality;
}
}
}
if( params[i] == CV_IMWRITE_JPEG_CHROM_QUALITY )
if( params[i] == CV_IMWRITE_JPEG_CHROMA_QUALITY )
{
chrom_quality = params[i+1];
chrom_quality = MIN(MAX(chrom_quality, 0), 100);
if (params[i+1] >= 0)
{
chroma_quality = MIN(MAX(params[i+1], 0), 100);
}
}
if( params[i] == CV_IMWRITE_JPEG_RST_INTERVAL )
@ -643,6 +654,7 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
jpeg_set_defaults( &cinfo );
cinfo.restart_interval = rst_interval;
jpeg_set_quality( &cinfo, quality,
TRUE /* limit to baseline-JPEG values */ );
if( progressive )
@ -651,17 +663,20 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
cinfo.optimize_coding = TRUE;
#if JPEG_LIB_VERSION >= 70
cinfo.q_scale_factor[0] = jpeg_quality_scaling(lum_quality);
cinfo.q_scale_factor[1] = jpeg_quality_scaling(chrom_quality);
if ( lum_quality != chrom_quality )
if (luma_quality >= 0 && chroma_quality >= 0)
{
/* disable subsampling - ref. Libjpeg.txt */
cinfo.comp_info[0].v_samp_factor = 1;
cinfo.comp_info[0].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.q_scale_factor[0] = jpeg_quality_scaling(luma_quality);
cinfo.q_scale_factor[1] = jpeg_quality_scaling(chroma_quality);
if ( luma_quality != chroma_quality )
{
/* disable subsampling - ref. Libjpeg.txt */
cinfo.comp_info[0].v_samp_factor = 1;
cinfo.comp_info[0].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[1].h_samp_factor = 1;
}
jpeg_default_qtables( &cinfo, TRUE );
}
jpeg_default_qtables( &cinfo, TRUE );
#endif // #if JPEG_LIB_VERSION >= 70
jpeg_start_compress( &cinfo, TRUE );