（21）Laplance

这个算法还是用来进行边缘检测的

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 1 #include <opencv2/opencv.hpp>
 2 #include <iostream>
 3 using namespace std;
 4 using namespace cv;
 5 
 6 Mat src, dst, gray_src;
 7 
 8 int main(int agrc, char** agrv) {
 9 
10     src = imread("C:\Users\32829\Desktop\aa.jpg");
11     if (!src.data) {
12         printf("no load..
");
13         return -1;
14     }
15     const char* input_win = "input";
16     const char* out_put = "out_put";
17     namedWindow(input_win, CV_WINDOW_AUTOSIZE);
18     namedWindow(out_put, CV_WINDOW_AUTOSIZE);
19     imshow(input_win, src);
20     GaussianBlur(src, dst, Size(3, 3), 0, 0);
21     cvtColor(dst, gray_src, CV_BGR2GRAY);
22     Mat edge_image;
23     Laplacian(gray_src, edge_image, CV_16S, 3);
24     convertScaleAbs(edge_image, edge_image);
25     threshold(edge_image, edge_image, 0, 255, THRESH_OTSU | THRESH_BINARY);
26     imshow(out_put, edge_image);
27 
28     waitKey(0);
29     return 0;
30 }

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