OpenCV学习之三：使用形态学操作获取图像边缘

时间：2011-01-04 来源：pixels

得到了图像的边缘，下图为示例结果：

源代码如下：

代码 1 #include "stdafx.h"
2
3 #include "cv.h"
4 #include "cxcore.h"
5 #include "highgui.h"
6
7 #pragma comment(lib, "cv.lib")
8 #pragma comment(lib, "cxcore.lib")
9 #pragma comment(lib, "highgui.lib")
10
11 int _tmain(int argc, _TCHAR* argv[])
12 {
13     IplImage *srcImg = cvLoadImage("D:\\luosi.jpg", 1);
14     IplImage *grayImg = cvCreateImage(cvGetSize(srcImg), 8, 1);
15     cvCvtColor(srcImg, grayImg, CV_BGR2GRAY);
16
17     IplImage *dstImg = cvCreateImage(cvGetSize(srcImg), 8, 1);
18     cvThreshold(grayImg, dstImg, cvMean(srcImg)*0.7, 255, CV_THRESH_BINARY);
19
20     IplConvKernel *kernel = cvCreateStructuringElementEx(3, 3, 1, 1, CV_SHAPE_CROSS);
21
22     cvMorphologyEx(dstImg, dstImg, NULL, kernel, CV_MOP_OPEN, 3);
23     cvMorphologyEx(dstImg, dstImg, NULL, kernel, CV_MOP_CLOSE, 1);
24
25     // Find edges: dilate(image) - image;
26     IplImage *dilatedImg = cvCreateImage(cvGetSize(srcImg), 8, 1);
27     cvDilate(dstImg, dilatedImg, kernel, 1);
28     cvSub(dilatedImg, dstImg, dstImg);
29
30     // Label edges in srcImg
31     IplImage *redCh = cvCreateImage(cvGetSize(srcImg), 8, 1);
32     IplImage *greenCh = cvCreateImage(cvGetSize(srcImg), 8, 1);
33     IplImage *blueCh = cvCreateImage(cvGetSize(srcImg), 8, 1);
34
35     cvSplit(srcImg, blueCh, greenCh, redCh, NULL);
36     cvOr(redCh, dstImg, redCh);
37     cvMerge(blueCh, greenCh, redCh, NULL, srcImg);
38
39     cvNamedWindow("src");
40     cvShowImage("src", srcImg);
41     cvNamedWindow("dst");
42     cvShowImage("dst", dstImg);
43
44     cvWaitKey(0);
45
46     return 0;
47 }
48
49

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