opencv图像锐化c++

以下是两种OpenCV图像锐化的C++实现方法：

1. 使用filter2D方法实现锐化

void image_descent(Mat& image) {
    // 定义锐化算子
    Mat sharp = (Mat_<int>(3, 3) << 0, -1, 0, -1, 5, -1, 0, -1, 0);
    Mat result    filter2D(image, result, -1, sharp, Point(-1, -1), 0, BORDER_DEFAULT);
    convertScaleAbs(result, result);
    namedWindow("sharp img", WINDOW_FREERATIO);
    imshow("sharp img", result);
}

2. 使用USM（Unsharp Masking）算法实现锐化

void usm_sharp(Mat& image) {
    Mat blur_img, lap_img;
    GaussianBlur(image, blur_img, Size(3, 3), 0, 0, BORDER_DEFAULT);
    Laplacian(image, lap_img, -1, 1, 1.0, 0, BORDER_DEFAULT);
    Mat usm_img;
    addWeighted(blur_img, 1, lap_img, -0.7, 0, usm_img, -1);
    namedWindow("usm_sharp img", WINDOW_FREERATIO);
    imshow("usm_sharp img", usm_img);
}