本系列代码托管于:https://github.com/chintsan-code/opencv4-tutorials
本篇使用的项目为:usm
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, const char** argv) {
Mat src = imread("../sample/lena512.bmp");
if (src.empty()) {
cout << "could not load image..." << endl;
return -1;
}
namedWindow("input", WINDOW_AUTOSIZE);
imshow("input", src);
// Unsharpen mask filter
Mat blur_image, dst;
GaussianBlur(src, blur_image, Size(3, 3), 0);
Laplacian(src, dst, -1, 1, 1.0, 0, BORDER_DEFAULT);
imshow("laplacian demo", dst);
Mat usm_image;
addWeighted(blur_image, 1.0, dst, -1.0, 0, usm_image);
imshow("usm filter", usm_image);
waitKey(0);
destroyAllWindows();
return 0;
}
USM:Unsharp mask
$$blur – Laplacia$$
可以去除一些细小的干扰细节和噪声,比一般直接使用卷积锐化算子得到的图像锐化结果更加真实可信
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