仿射变换实例

#include<cv.h>#include<highgui.h>int main(){CvPoint2D32f srcTri[3], dstTri[3];CvMat*       rot_mat = cvCreateMat (2, 3, CV_32FC1);CvMat*       warp_mat = cvCreateMat (2, 3, CV_32FC1);IplImage*    src = NULL;IplImage*    dst = NULL;src = cvLoadImage ("lena.jpg", 1);dst = cvCloneImage (src);dst->origin = src->origin;cvZero (dst);srcTri[0].x = 0;srcTri[0].y = 0;srcTri[1].x = src->width - 1;srcTri[1].y = 0;srcTri[2].x = 0;srcTri[2].y = src->height - 1;dstTri[0].x = src->width * 0.0;dstTri[0].y = src->height * 0.33;dstTri[1].x = src->width * 0.85;dstTri[1].y = src->height * 0.25;dstTri[2].x = src->width * 0.15;dstTri[2].y = src->height * 0.7;cvGetAffineTransform (srcTri, dstTri, warp_mat);cvWarpAffine (src, dst, warp_mat);cvCopy (dst, src);CvPoint2D32f center = cvPoint2D32f (src->width / 2, src->height / 2);double angle = -50.0;double scale = 0.6;cv2DRotationMatrix (center, angle, scale, rot_mat);cvWarpAffine (src, dst, rot_mat);cvNamedWindow ("Affine_Transform", 1);cvShowImage ("Affine_Transform", dst);cvWaitKey (0);cvReleaseImage (&src);cvReleaseImage (&dst);cvReleaseMat (&warp_mat);cvReleaseMat (&rot_mat);return 0;}