3rdparty: libjpeg-turbo: IMWRITE_JPEG_LUMA/CHROMA_QUALITY doesn't work with internal libjpeg-turbo #25646
Description
System Information
OpenCV version: 4.10.0-pre ( 4.9.0-522-g1fa96b161f )
Operating System / Platform: Ubuntu 24.04
Compiler & compiler version: GCC 13.2.0
Detailed description
Internal libjpeg-turbo is JPEG_LIB_VERSION=62.
opencv/3rdparty/libjpeg-turbo/CMakeLists.txt
Line 137 in 1fa96b1
However, IMWRITE_JPEG_LUMA_QUALITY and IMWRITE_JPEG_CHROMA_QUALITY requests JPEG_LIB_VERSION >= 70.
opencv/modules/imgcodecs/src/grfmt_jpeg.cpp
Lines 786 to 801 in 1fa96b1
Steps to reproduce
std::vector<uint8_t> jpegNormal;
cv::imencode(".jpg", src, jpegNormal);
std::vector<int> param;
param.push_back(IMWRITE_JPEG_LUMA_QUALITY);
param.push_back(95);
param.push_back(IMWRITE_JPEG_CHROMA_QUALITY);
param.push_back(80);
std::vector<uint8_t> jpegCustom;
cv::imencode(".jpg", src, jpegCustom, param);
and compare jpegNormal and jpegCustom.
Issue submission checklist
- I report the issue, it's not a question
- I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
- I updated to the latest OpenCV version and the issue is still there
- There is reproducer code and related data files (videos, images, onnx, etc)