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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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1
modules/highgui/include/opencv2/highgui.hpp
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@ -216,6 +216,7 @@ enum { IMREAD_UNCHANGED = -1, // 8bit, color or not
};
enum { IMWRITE_JPEG_QUALITY = 1,
IMWRITE_JPEG_PROGRESSIVE = 2,
IMWRITE_PNG_COMPRESSION = 16,
IMWRITE_PNG_STRATEGY = 17,
IMWRITE_PNG_BILEVEL = 18,

1
modules/highgui/include/opencv2/highgui/highgui_c.h
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@ -220,6 +220,7 @@ CVAPI(CvMat*) cvLoadImageM( const char* filename, int iscolor CV_DEFAULT(CV_LOAD
enum
{
CV_IMWRITE_JPEG_QUALITY =1,
CV_IMWRITE_JPEG_PROGRESSIVE =2,
CV_IMWRITE_PNG_COMPRESSION =16,
CV_IMWRITE_PNG_STRATEGY =17,
CV_IMWRITE_PNG_BILEVEL =18,

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 )

24
modules/highgui/test/test_grfmt.cpp
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@ -386,6 +386,30 @@ TEST(Highgui_Jpeg, encode_empty)
ASSERT_THROW(cv::imencode(".jpg", img, jpegImg), cv::Exception);
}
TEST(Highgui_Jpeg, encode_decode_progressive_jpeg)
{
cvtest::TS& ts = *cvtest::TS::ptr();
string input = string(ts.get_data_path()) + "../cv/shared/lena.png";
cv::Mat img = cv::imread(input);
ASSERT_FALSE(img.empty());
std::vector<int> params;
params.push_back(IMWRITE_JPEG_PROGRESSIVE);
params.push_back(1);
string output_progressive = cv::tempfile(".jpg");
EXPECT_NO_THROW(cv::imwrite(output_progressive, img, params));
cv::Mat img_jpg_progressive = cv::imread(output_progressive);
string output_normal = cv::tempfile(".jpg");
EXPECT_NO_THROW(cv::imwrite(output_normal, img));
cv::Mat img_jpg_normal = cv::imread(output_normal);
EXPECT_EQ(0, cv::norm(img_jpg_progressive, img_jpg_normal, NORM_INF));
remove(output_progressive.c_str());
}
#endif