OpenCV: 三对点计算仿射变换

// 仿射变换.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <cv.h>#include <highgui.h>#include<windows.h>#define affine #ifdef affineint main(int argc, char** argv){   CvPoint2D32f srcTri[3], dstTri[3];   CvMat* rot_mat = cvCreateMat(2,3,CV_32FC1);   CvMat* warp_mat = cvCreateMat(2,3,CV_32FC1);   IplImage *src, *dst;    if( argc == 1 && ((src=cvLoadImage("lenagray.jpg",1)) != 0 ))//原文中是argc == 2，错误    {   dst = cvCloneImage(src);   dst->origin = src->origin;   cvZero(dst);   //COMPUTE WARP MATRIX   srcTri[0].x = 0;          //src Top left   srcTri[0].y = 0;   srcTri[1].x = src->width - 1;    //src Top right   srcTri[1].y = 0;   srcTri[2].x = 0;          //src Bottom left   srcTri[2].y = src->height - 1;   //- - - - - - - - - - - - - - -//   dstTri[0].x = src->width*0.0;    //dst Top left   dstTri[0].y = src->height*0.33;   dstTri[1].x = src->width*0.85; //dst Top right   dstTri[1].y = src->height*0.25;   dstTri[2].x = src->width*0.15; //dst Bottom left   dstTri[2].y = src->height*0.7;   cvGetAffineTransform(srcTri,dstTri,warp_mat);//由三对点计算仿射变换   cvWarpAffine(src,dst,warp_mat);   cvCopy(dst,src);   //COMPUTE ROTATION MATRIX   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);   //DO THE TRANSFORM:   cvNamedWindow( "Affine_Transform", 1 );      cvShowImage( "Affine_Transform", dst );      cvWaitKey();    }   cvReleaseImage(&dst);   cvReleaseMat(&rot_mat);   cvReleaseMat(&warp_mat);   system("pause");    return 0;}#endif

运行结果