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added jpeg progressive support.

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This commit is contained in:
Nicolas Gryman
2014-02-18 23:36:26 -05:00
committed by ngryman
parent 3782c324c4
commit b211e1d989
4 changed files with 40 additions and 6 deletions
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8
modules/highgui/src/grfmt_jpeg.cpp
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@@ -598,6 +598,7 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
cinfo.in_color_space = channels > 1 ? JCS_RGB : JCS_GRAYSCALE;
int quality = 95;
int progressive = 0;
for( size_t i = 0; i < params.size(); i += 2 )
{
@@ -606,11 +607,18 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
quality = params[i+1];
quality = MIN(MAX(quality, 0), 100);
}
if( params[i] == CV_IMWRITE_JPEG_PROGRESSIVE )
{
progressive = params[i+1];
}
}
jpeg_set_defaults( &cinfo );
jpeg_set_quality( &cinfo, quality,
TRUE /* limit to baseline-JPEG values */ );
if( progressive )
jpeg_simple_progression( &cinfo );
jpeg_start_compress( &cinfo, TRUE );
if( channels > 1 )