OpenCV-仿射变换

#include <opencv2/opencv.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace std;
using namespace cv;

int main()
{
	Mat tag;
	Mat tagdst = Mat::zeros(tag.cols, tag.rows, tag.type());
	tag = imread("E://VS-pro//images//flower.bmp");

	imshow("原图", tag);
	Point2f srcTr[3];
	Point2f dstTr[3];
	srcTr[0] = Point(tag.cols / 4, tag.cols / 4);
	srcTr[1] = Point(tag.cols - 1, 0);
	srcTr[2] = Point(0, tag.rows - 1);

	dstTr[0] = Point(tag.cols / 4, tag.cols / 4);
	dstTr[1] = Point(tag.cols - 1, 0);
	dstTr[2] = Point(0, tag.rows / 2);

	Mat warpMat = getAffineTransform(srcTr, dstTr);
	warpAffine(tag, tagdst, warpMat, tagdst.size());
	imshow("变换后", tagdst);
	waitKey(0);
	return 0;
}

不同参数

Point2f srcTr[3];
	Point2f dstTr[3];
	srcTr[0] = Point(0, 0);
	srcTr[1] = Point(tag.cols - 1, 0);
	srcTr[2] =