在OpenCV中利用鼠標馬賽克圖像部分區域

這是一個簡單的馬賽克程序，利用選定矩形區域的平均值代替該區域各點的像素值。大家有沒有更好的方法馬賽克呢？

1. #include <cv.h>  
2. #include <highgui.h>  
3. #pragma comment( lib, "cv.lib" )  
4. #pragma comment( lib, "cxcore.lib" )  
5. #pragma comment( lib, "highgui.lib" )   
6. IplImage* org = 0;  
7. IplImage* img = 0;   
8. IplImage* tmp = 0;  
9. IplImage* dst = 0;   
10. int foo=6;  
11. void on_mouse( int event, int x, int y, int flags, void* ustc)  
12. {  
13.     CvPoint p0;  
14.     CvPoint p1;  
15.     if( event == CV_EVENT_MOUSEMOVE && !(flags & CV_EVENT_FLAG_LBUTTON))  
16.     {  
17.         img=cvCloneImage(tmp);  
18.         cvResetImageROI(img);  
19.         if(x<foo)  
20.         {  
21.             if(y<foo)  
22.             {  
23.                 p0=cvPoint(0,0);  
24.                 p1=cvPoint(2*foo,2*foo);  
25.             }  
26.             else if(y>img->height-foo)  
27.             {   
28.                 p0=cvPoint(0,img->height-2*foo);  
29.                 p1=cvPoint(2*foo,img->height);  
30.             }  
31.             else  
32.             {  
33.                 p0=cvPoint(0,y-foo);  
34.                 p1=cvPoint(2*foo,y+foo);  
35.             }  
36.         }  
37.         else if(x>img->width-foo)  
38.         {  
39.             if(y<foo)  
40.             {  
41.                 p0=cvPoint(img->width-2*foo,0);  
42.                 p1=cvPoint(img->width,2*foo);  
43.             }  
44.             else if(y>img->height-foo)  
45.             {   
46.                 p0=cvPoint(img->width-2*foo,img->height-2*foo);  
47.                 p1=cvPoint(img->width,img->height);  
48.             }  
49.             else  
50.             {  
51.                 p0=cvPoint(img->width-2*foo,y-foo);  
52.                 p1=cvPoint(img->width,y+foo);  
53.             }  
54.         }  
55.         else  
56.         {  
57.             if(y<foo)  
58.             {  
59.                 p0=cvPoint(x-foo,0);  
60.                 p1=cvPoint(x+foo,2*foo);  
61.             }  
62.             else if(y>img->height-foo)  
63.             {   
64.                 p0=cvPoint(x-foo,img->height-2*foo);  
65.                 p1=cvPoint(x+foo,img->height);  
66.             }  
67.             else  
68.             {  
69.                 p0=cvPoint(x-foo,y-foo);  
70.                 p1=cvPoint(x+foo,y+foo);  
71.             }  
72.         }  
73.         cvRectangle(img,p0,p1,CV_RGB(0,255,0));  
74.         cvShowImage( "img", img );  
75.     }  
76.     else if( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON))  
77.     {  
78.         if(x<foo)  
79.         {  
80.             if(y<foo)  
81.             {  
82.                 p0=cvPoint(0,0);  
83.                 p1=cvPoint(2*foo,2*foo);  
84.             }  
85.             else if(y>img->height-foo)  
86.             {   
87.                 p0=cvPoint(0,img->height-2*foo);  
88.                 p1=cvPoint(2*foo,img->height);  
89.             }  
90.             else  
91.             {  
92.                 p0=cvPoint(0,y-foo);  
93.                 p1=cvPoint(2*foo,y+foo);  
94.             }  
95.         }  
96.         else if(x>img->width-foo)  
97.         {  
98.             if(y<foo)  
99.             {  
100.                 p0=cvPoint(img->width-2*foo,0);  
101.                 p1=cvPoint(img->width,2*foo);  
102.             }  
103.             else if(y>img->height-foo)  
104.             {   
105.                 p0=cvPoint(img->width-2*foo,img->height-2*foo);  
106.                 p1=cvPoint(img->width,img->height);  
107.             }  
108.             else  
109.             {  
110.                 p0=cvPoint(img->width-2*foo,y-foo);  
111.                 p1=cvPoint(img->width,y+foo);  
112.             }  
113.         }  
114.         else  
115.         {  
116.             if(y<foo)  
117.             {  
118.                 p0=cvPoint(x-foo,0);  
119.                 p1=cvPoint(x+foo,2*foo);  
120.             }  
121.             else if(y>img->height-foo)  
122.             {   
123.                 p0=cvPoint(x-foo,img->height-2*foo);  
124.                 p1=cvPoint(x+foo,img->height);  
125.             }  
126.             else  
127.             {  
128.                 p0=cvPoint(x-foo,y-foo);  
129.                 p1=cvPoint(x+foo,y+foo);  
130.             }  
131.         }  
132.         dst=cvCloneImage(tmp);    
133.         cvSetImageROI(dst,cvRect(p0.x,p0.y,p1.x-p0.x,p1.y-p0.y));  
134.         CvScalar mean=cvAvg(dst);  
135.         cvSet(dst,mean);  
136.         cvResetImageROI(dst);  
137.         tmp=cvCloneImage(dst);  
138.         cvRectangle(dst,p0,p1,CV_RGB(0,255,0));  
139.         cvShowImage( "img", dst );        
140.     }  
141. }  
142. int main()  
143. {  
144.     org=cvLoadImage("lena.jpg",1);  
145.     img=cvCloneImage(org);  
146.     tmp=cvCloneImage(org);  
147.     dst=cvCloneImage(org);  
148.     cvNamedWindow("img",1);  
149.     cvSetMouseCallback( "img", on_mouse, 0 );  
150.     cvShowImage("img",img);  
151.     cvWaitKey(0);   
152.     cvDestroyAllWindows();  
153.     cvReleaseImage(&org);  
154.     cvReleaseImage(&img);  
155.     cvReleaseImage(&tmp);  
156.     cvReleaseImage(&dst);  
157.     return 0;  
158. }  

效果圖如下，這裡馬賽克了lena圖的左眼。