OpenCV設置保存圖像壓縮率

OpenCV寫入靜態圖片時，imwrite函數第三個參數可以設置壓縮率，默認值為95.

cv::Mat inImage= cv::imread("lena.jpg");

vector<int> compression_params;       
compression_params.push_back(CV_IMWRITE_JPEG_QUALITY);
compression_params.push_back(100); 

cv::imwrite("outImage.jpg", frame, compression_params);