/*
根据四个点计算透视变换矩阵warp_mat,原图src根据变换矩阵warp_mat计算得到dst变换图像
*/
#include "stdafx.h"
#include<cv.h>
#include <highgui.h>
#include <math.h>
int main()
{
CvPoint2D32f srcTri[4], dstTri[4];
CvMat* warp_mat = cvCreateMat (3, 3, CV_32FC1);
IplImage* src = NULL;
IplImage* dst = NULL;
src = cvLoadImage ("D:\\VCcodes\\00OpenCv\\Image&Video\\公路.bmp", 1);
dst = cvCloneImage (src);
dst->origin = src->origin;
cvZero (dst);
srcTri[0].x = 216;
srcTri[0].y = 0;
srcTri[1].x = 378;
srcTri[1].y = 0;
srcTri[2].x = 0;
srcTri[2].y = src->height - 1;
srcTri[3].x = src->width - 1;
srcTri[3].y = 198;
dstTri[0].x = 0;
dstTri[0].y = 0;
dstTri[1].x = src->width-1;
dstTri[1].y = 0;
dstTri[2].x = 0;
dstTri[2].y = src->height - 1;
dstTri[3].x = src->width-1;
dstTri[3].y = 198;
cvGetPerspectiveTransform (srcTri, dstTri, warp_mat);
cvWarpPerspective (src, dst, warp_mat);
cvNamedWindow("src", 1);
cvShowImage("src", src);
cvNamedWindow ("Affine_Transform", 1);
cvShowImage ("Affine_Transform", dst);
cvWaitKey (0);
cvReleaseImage (&src);
cvReleaseImage (&dst);
cvReleaseMat (&warp_mat);
return 0;
根据四个点计算透视变换矩阵warp_mat,原图src根据变换矩阵warp_mat计算得到dst变换图像
*/
#include "stdafx.h"
#include<cv.h>
#include <highgui.h>
#include <math.h>
int main()
{
CvPoint2D32f srcTri[4], dstTri[4];
CvMat* warp_mat = cvCreateMat (3, 3, CV_32FC1);
IplImage* src = NULL;
IplImage* dst = NULL;
src = cvLoadImage ("D:\\VCcodes\\00OpenCv\\Image&Video\\公路.bmp", 1);
dst = cvCloneImage (src);
dst->origin = src->origin;
cvZero (dst);
srcTri[0].x = 216;
srcTri[0].y = 0;
srcTri[1].x = 378;
srcTri[1].y = 0;
srcTri[2].x = 0;
srcTri[2].y = src->height - 1;
srcTri[3].x = src->width - 1;
srcTri[3].y = 198;
dstTri[0].x = 0;
dstTri[0].y = 0;
dstTri[1].x = src->width-1;
dstTri[1].y = 0;
dstTri[2].x = 0;
dstTri[2].y = src->height - 1;
dstTri[3].x = src->width-1;
dstTri[3].y = 198;
cvGetPerspectiveTransform (srcTri, dstTri, warp_mat);
cvWarpPerspective (src, dst, warp_mat);
cvNamedWindow("src", 1);
cvShowImage("src", src);
cvNamedWindow ("Affine_Transform", 1);
cvShowImage ("Affine_Transform", dst);
cvWaitKey (0);
cvReleaseImage (&src);
cvReleaseImage (&dst);
cvReleaseMat (&warp_mat);
return 0;
}