仿射变换

原文：http://blog.youkuaiyun.com/xiaojidan2011/article/details/8026410

[cpp]  view plain copy

1. void main( )  
2. {  
3.     IplImage *Img_old=cvLoadImage("e:\\kankan\\corner.png");  
4.     IplImage* Img_tmp =cvCloneImage( Img_old);   
5.   
6.     int angle=90;  
7.     float m[6];              
8.     CvMat M = cvMat( 2, 3, CV_32F, m );  
9.     CvPoint2D32f center;  
10.     center.x=float (Img_old->width/2.0+0.5);  
11.     center.y=float (Img_old->height/2.0+0.5);     
12.     cv2DRotationMatrix( center, angle,1, &M);  
13.   
14.     cvWarpAffine(Img_old,Img_tmp, &M,CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS,cvScalarAll(0) );  
15.   
16.     cvNamedWindow ("src", 1);  
17.     cvShowImage ("src", Img_old);  
18.     cvNamedWindow( "dst", 1 );  
19.     cvShowImage( "dst", Img_tmp );  
20.   
21.     cvWaitKey(0);  
22.     cvReleaseImage(&Img_old);  
23.     cvReleaseImage(&Img_tmp);  
24. }  

附上效果图：

http://blog.youkuaiyun.com/column/details/johntian-opencv.html