旋转+缩放

#include "highgui.h"#include "cv.h"#include <iostream>#include <iomanip>using namespace std;int main(){IplImage* src = cvLoadImage("lena.jpg");IplImage* dst = cvCloneImage(src);int delta = 1;int angle = 0;int opt = 1; //1表示旋转加缩放，0表示旋转double factor; //表示方法系数cvNamedWindow("src",CV_WINDOW_AUTOSIZE);cvShowImage("src",src);for (; ;){float m[6];CvMat M = cvMat(2, 3, CV_32F,m);int w = src->width;int h = src->height;if(opt){factor = (cos(angle*CV_PI/180) + 1.05)*2;}else{factor = 1;}m[0] = (float)(factor*cos(-angle*2*CV_PI/180));m[1] = (float)(factor*sin(-angle*2*CV_PI/180));m[3] = -m[1];m[4] = m[0];m[2] = w*0.5f;m[5] = h*0.5f;cvGetQuadrangleSubPix(src,dst,&M);cvNamedWindow("dst",1);cvShowImage("dst",dst);if (cvWaitKey(5) == 'q'){break;}angle = (int)(angle + delta) % 360;}}