1 #include "opencv2/imgproc/imgproc.hpp"
2 #include "opencv2/highgui/highgui.hpp"
3 #include <stdlib.h>
4 #include <stdio.h>
5
6 using namespace cv;
7
8 /** @function main */
9 int main( int argc, char** argv )
10 {
11
12 Mat src, src_gray;
13 Mat grad;
14 char* window_name = "Sobel Demo - Simple Edge Detector";
15 int scale = 1;
16 int delta = 0;
17 int ddepth = CV_16S;
18
19 int c;
20
21 /// 装载图像
22 src = imread( argv[1] );
23
24 if( !src.data )
25 { return -1; }
26
27 GaussianBlur( src, src, Size(3,3), 0, 0, BORDER_DEFAULT );
28
29 /// 转换为灰度图
30 cvtColor( src, src_gray, CV_RGB2GRAY );
31
32 /// 创建显示窗口
33 namedWindow( window_name, CV_WINDOW_AUTOSIZE );
34
35 /// 创建 grad_x 和 grad_y 矩阵
36 Mat grad_x, grad_y;
37 Mat abs_grad_x, abs_grad_y;
38
39 /// 求 X方向梯度
40 //Scharr( src_gray, grad_x, ddepth, 1, 0, scale, delta, BORDER_DEFAULT );
41 Sobel( src_gray, grad_x, ddepth, 1, 0, 3, scale, delta, BORDER_DEFAULT );
42 convertScaleAbs( grad_x, abs_grad_x );
43
44 /// 求Y方向梯度
45 //Scharr( src_gray, grad_y, ddepth, 0, 1, scale, delta, BORDER_DEFAULT );
46 Sobel( src_gray, grad_y, ddepth, 0, 1, 3, scale, delta, BORDER_DEFAULT );
47 convertScaleAbs( grad_y, abs_grad_y );
48
49 /// 合并梯度(近似)
50 addWeighted( abs_grad_x, 0.5, abs_grad_y, 0.5, 0, grad );
51
52 imshow( window_name, grad );
53
54 waitKey(0);
55
56 return 0;
57 }
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