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added jpeg with optimized coding support.

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This commit is contained in:
Nicolas Gryman 2014-02-18 23:45:48 -05:00 committed by ngryman
parent 04c857a4e8
commit da34f1d58c
4 changed files with 34 additions and 0 deletions
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1
modules/highgui/include/opencv2/highgui.hpp
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@ -217,6 +217,7 @@ enum { IMREAD_UNCHANGED = -1, // 8bit, color or not
enum { IMWRITE_JPEG_QUALITY = 1,
IMWRITE_JPEG_PROGRESSIVE = 2,
IMWRITE_JPEG_OPTIMIZE = 3,
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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@ -221,6 +221,7 @@ enum
{
CV_IMWRITE_JPEG_QUALITY =1,
CV_IMWRITE_JPEG_PROGRESSIVE =2,
CV_IMWRITE_JPEG_OPTIMIZE =3,
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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@ -599,6 +599,7 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
int quality = 95;
int progressive = 0;
int optimize = 0;
for( size_t i = 0; i < params.size(); i += 2 )
{
@ -612,6 +613,11 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
{
progressive = params[i+1];
}
if( params[i] == CV_IMWRITE_JPEG_OPTIMIZE )
{
optimize = params[i+1];
}
}
jpeg_set_defaults( &cinfo );
@ -619,6 +625,8 @@ bool JpegEncoder::write( const Mat& img, const std::vector<int>& params )
TRUE /* limit to baseline-JPEG values */ );
if( progressive )
jpeg_simple_progression( &cinfo );
if( optimize )
cinfo.optimize_coding = TRUE;
jpeg_start_compress( &cinfo, TRUE );
if( channels > 1 )

24
modules/highgui/test/test_grfmt.cpp
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@ -410,6 +410,30 @@ TEST(Highgui_Jpeg, encode_decode_progressive_jpeg)
remove(output_progressive.c_str());
}
TEST(Highgui_Jpeg, encode_decode_optimize_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_OPTIMIZE);
params.push_back(1);
string output_optimized = cv::tempfile(".jpg");
EXPECT_NO_THROW(cv::imwrite(output_optimized, img, params));
cv::Mat img_jpg_optimized = cv::imread(output_optimized);
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_optimized, img_jpg_normal, NORM_INF));
remove(output_optimized.c_str());
}
#endif