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。