OpenCV函数cvWarpPerspective透视变换实例

#include<cv.h>
#include<highgui.h>

#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")

int main()
{
	CvPoint2D32f srcTri[4], dstTri[4];
	CvMat*       warp_mat = cvCreateMat (3, 3, CV_32FC1);
	IplImage*    src = NULL;
	IplImage*    dst = NULL;

	src = cvLoadImage ("test.png", 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;
	srcTri[3].x = src->width - 1;
	srcTri[3].y = src->height - 1;

	dstTri[0].x = src->width * 0.05;
	dstTri[0].y = src->height * 0.33;
	dstTri[1].x = src->width * 0.9;
	dstTri[1].y = src->height * 0.25;
	dstTri[2].x = src->width * 0.2;
	dstTri[2].y = src->height * 0.7;
	dstTri[3].x = src->width * 0.8;
	dstTri[3].y = src->height * 0.9;

	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;
}

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