opencv 图像增强

    Mat src= imread( "D:\\OCR\\Debug\\Temp\\Rects\\wholeMat_00191_0_0.jpg");
    Mat dest;
    Mat kern = (Mat_<char>(,) << , - ,,
        -, , -,
        , -, );
    filter2D(src,dest,src.depth(),kern);
    imshow("src",src);
    imshow("dest",dest);
    imwrite("D:\\dest.jpg",dest);
    waitKey();

可以实现图像增强，处理过后图像大小增大30%