I am trying to save images as JPEG, but OpenCV 4.5.2 (built with Turbo JPEG from source) is saving all-white images. I can never make out any detail. Writing PNG files works fine. Does anyone know what might be going wrong with writing JPEG files?
My raw image data is coming from a Mat structure, it’s 16bit unsigned (should be ok for jpeg)
// Support for writing JPG vector<int> compression_params; compression_params.push_back(cv::IMWRITE_JPEG_QUALITY); compression_params.push_back(100); fs::path output_jpeg = fs::path("C:/images") / fs::path("image.jpg"); bool canwritejpg = cv::haveImageWriter(output_jpeg.filename().string()); // snip // always gives a white image when trying to output jpeg, // saving a png works fine though bool rc = cv::imwrite(output_jpeg.string(), im, compression_params);