《学习OpenCV》练习题第三章第五题 

 1 #include <highgui.h>
 2 #include <cv.h>
 3 #include <stdio.h>
 4 
 5 #pragma comment (lib,"opencv_calib3d231d.lib")
 6 #pragma comment (lib,"opencv_contrib231d.lib")
 7 #pragma comment (lib,"opencv_core231d.lib")
 8 #pragma comment (lib,"opencv_features2d231d.lib")
 9 #pragma comment (lib,"opencv_flann231d.lib")
10 #pragma comment (lib,"opencv_gpu231d.lib")
11 #pragma comment (lib,"opencv_haartraining_engined.lib")
12 #pragma comment (lib,"opencv_highgui231d.lib")
13 #pragma comment (lib,"opencv_imgproc231d.lib")
14 #pragma comment (lib,"opencv_legacy231d.lib")
15 #pragma comment (lib,"opencv_ml231d.lib")
16 #pragma comment (lib,"opencv_objdetect231d.lib")
17 #pragma comment (lib,"opencv_ts231d.lib")
18 #pragma comment (lib,"opencv_video231d.lib")
19 
20 /*
21  *《学习OpenCV》第三章第五题
22  * 完成时间：2:49 3/2 星期六 2013
23  */
24 
25 // 图像高宽
26 #define IMG_SIZE   420
27 
28 // 边界宽度
29 #define BORDER_WIDTH 10
30 
31 int main()
32 {
33     // 创建8位单通道图像
34     IplImage * image = cvCreateImage(cvSize(IMG_SIZE, IMG_SIZE), 8, 1);
35 
36     // 初始化置零
37     cvZero(image);
38     
39     // 灰度值
40     int value = 0;
41     // ROI区域大小
42     int rect_size = IMG_SIZE;
43     for(int length = IMG_SIZE; length >= 0 && value <= 200; length -= BORDER_WIDTH, value += 10)
44     {
45         cvSetImageROI(image, cvRect(IMG_SIZE - length, IMG_SIZE- length, rect_size, rect_size));
46 
47         rect_size -= 2 *BORDER_WIDTH;
48         cvSet(image, cvScalarAll(value));
49         cvResetImageROI(image);
50     }
51 
52     cvNamedWindow("img", 1);
53     cvShowImage("img", image);
54 
55     cvWaitKey(0);
56     cvReleaseImage(&image);
57     cvDestroyAllWindows();
58 
59     return 0;
60 }

运行结果：

posted @ 2013-04-07 19:43  qdsclove  阅读(237)  评论(0)  编辑  收藏  举报