图像几何变换各项操作

来源：互联网发布：oracle sql执行顺序编辑：程序博客网时间：2024/05/20 17:39
/*图像的几何变换*/#include<opencv2\opencv.hpp>#include<cxcore.h>#include<iostream>#include<cmath>using namespace cv;using namespace std;int main() {Mat img_org = imread("D://图片//5.jpg");if (img_org.empty()) {cout << "加载失败！" << endl;return -1;}Mat img_s, img_t, img_r, img_Sk, img_Re_h, img_Re_v, img_Re_g, img_Pre;resize(img_org, img_s, Size(0, 0), 0.5, 0.5);   //缩小图片Mat M = (Mat_<double>(2, 3) << 1, 0, 20, 0, 1, 50);warpAffine(img_org, img_t, M, img_org.size());        //根据变换矩阵M平移Mat M2 = getRotationMatrix2D(Point2f(img_org.cols / 2, img_org.cols / 2), 25, 1);warpAffine(img_org, img_r, M2, img_org.size());      //同上，当参数不同，变换矩阵不同时操作不同，此处为旋转double m = 1 / tan(3.14 / 3);Mat M3 = (Mat_<double>(2, 3) << 1, m, 0, 0, 1, 0);warpAffine(img_org, img_Sk, M3, Size(img_org.cols + 0.5*img_org.cols, img_org.rows));   //同上，此处进行倾斜变换Mat M_h = (Mat_<double>(2, 3) << -1, 0, img_org.cols, 0, 1, 0);     //同上，水平反射Mat M_v = (Mat_<double>(2, 3) << 1, 0, 0, 0, -1, img_org.rows);       //垂直反射Mat M_g = (Mat_<double>(2, 3) << -1, 0, img_org.cols, 0, -1, img_org.rows);  //组合反射warpAffine(img_org, img_Re_h, M_h, img_org.size());warpAffine(img_org, img_Re_v, M_v, img_org.size());warpAffine(img_org, img_Re_g, M_g, img_org.size());Point2f img_verts[4], tem_verts[4];      //透视需要4点img_verts[0] = Point(195, 140);img_verts[1] = Point(410, 120);img_verts[2] = Point(220, 750);img_verts[3] = Point(400, 750);tem_verts[0] = Point(160, 100);tem_verts[1] = Point(530, 120);tem_verts[2] = Point(220, 750);tem_verts[3] = Point(400, 750);Mat M_Pre = getPerspectiveTransform(img_verts, tem_verts);     //透视变换warpPerspective(img_org, img_Pre, M_Pre, img_org.size());imshow("img_s", img_s);imshow("img_t", img_t);imshow("img_r", img_r);imshow("img_Sk", img_Sk);imshow("img_Re_h", img_Re_h);imshow("img_Re_v", img_Re_v);imshow("img_Re_g", img_Re_g);imshow("img_Pre", img_Pre);waitKey(0);destroyAllWindows;return 0;}
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