OpenCV 利用滾動條調整圖像亮度

OpenCV 利用滾動條調整圖像亮度:

1. /************************************************************************/
2. /* 亮度調整 */
3. /************************************************************************/
5. IplImage*transimg,*srcimg;
6. int bright2adj;
8. void re_adjust_bright(int)
9. {
10. assert(srcimg != NULL);
11. assert(transimg != NULL);
12. int x,y,i;
13. if(srcimg->nChannels==3)
14. {
15. for (i = 0; i < 3; i++)//彩色圖像需要處理3個通道，灰度圖像這裡可以刪掉
16. for (y = 0; y < srcimg->height; y++)
17. for (x = 0; x < srcimg->width; x++)
18. {
19. float val = ((uchar*)(srcimg->imageData + srcimg->widthStep*y))[x*3+i];
20. val+=bright2adj;
21. if(val<0) val=0;
22. else if(val>255) val=255;
23. ((uchar*)(transimg->imageData + transimg->widthStep*y))[x*3+i] = (uchar)val;
24. }
25. }
26. else
27. {
28. for (y = 0; y < srcimg->height; y++)
29. for (x = 0; x < srcimg->width; x++)
30. {
31. float val = ((uchar*)(srcimg->imageData + srcimg->widthStep*y))[x];
32. val+=bright2adj;
33. if(val<0) val=0;
34. else if(val>255) val=255;
35. ((uchar*)(transimg->imageData + transimg->widthStep*y))[x] = (uchar)val;
36. }
37. }
38. cvShowImage("image",transimg);
39. }
41. void on_mouse3(int event,int x,int y,int flags,void* param)
42. {
43. if(event==CV_EVENT_LBUTTONUP)
44. re_adjust_bright(0);
45. }
47. void CCVMFCView::OnAdjustBrightness()
48. {
49. srcimg=cvCloneImage(workImg);
50. cvFlip(srcimg);
51. transimg=cvCloneImage(srcimg);
53. cvNamedWindow("image",CV_WINDOW_AUTOSIZE);
54. cvCreateTrackbar("亮度", "image", &bright2adj, 255,re_adjust_bright);
55. //re_adjust_bright(0);
56. cvShowImage("image",srcimg);
58. cvSetMouseCallback("image",on_mouse3,0);
60. cvWaitKey(0);
61. cvDestroyWindow("image");
62. cvReleaseImage(&srcimg);
63. cvFlip(transimg);
64. m_dibFlag=imageReplace(transimg,&workImg);
66. m_ImageType=2;
67. Invalidate();
68. }