这个程序使用OpenCV执行仿射变换。
输入图像：
执行仿射变换后的图片：
执行仿射变换加旋转50度后的图片：
代码：
#include "opencv2/imgcodecs.hpp" #include "opencv2/highgui.hpp" #include "opencv2/imgproc.hpp" #include <iostream> int main() { Mat src = imread("input.jpg"); Point2f srcTri[3]; srcTri[0] = Point2f( 0.f, 0.f ); srcTri[1] = Point2f( src.cols - 1.f, 0.f ); srcTri[2] = Point2f( 0.f, src.rows - 1.f ); Point2f dstTri[3]; dstTri[0] = Point2f( 0.f, src.rows*0.33f ); dstTri[1] = Point2f( src.cols*0.85f, src.rows*0.25f ); dstTri[2] = Point2f( src.cols*0.15f, src.rows*0.7f ); Mat warp_mat = getAffineTransform( srcTri, dstTri ); Mat warp_dst = Mat::zeros( src.rows, src.cols, src.type() ); warpAffine( src, warp_dst, warp_mat, warp_dst.size() ); Point center = Point( warp_dst.cols/2, warp_dst.rows/2 ); double angle = -50.0; double scale = 0.6; Mat rot_mat = getRotationMatrix2D( center, angle, scale ); Mat warp_rotate_dst; warpAffine( warp_dst, warp_rotate_dst, rot_mat, warp_dst.size() ); imshow( "Source image", src ); imshow( "Warp", warp_dst ); imshow( "Warp + Rotate", warp_rotate_dst ); waitKey(); return 0; }
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