#include 
     
      #include 
      
       #include 
       
        #include "opencv2/opencv.hpp"using namespace std;using namespace cv;bool rotation(Mat &in, Mat &out, const Size rect_size,                            const Point2f center, const double angle) {  if (1) {    imshow("in", in);    waitKey(0);    //destroyWindow("in");  }  Mat in_large;  in_large.create(int(in.rows * 1.5), int(in.cols * 1.5), in.type());  float x = in_large.cols / 2 - center.x > 0 ? in_large.cols / 2 - center.x : 0;  float y = in_large.rows / 2 - center.y > 0 ? in_large.rows / 2 - center.y : 0;//相对于in_large in的tl点坐标  float width = x + in.cols < in_large.cols ? in.cols : in_large.cols - x;  float height = y + in.rows < in_large.rows ? in.rows : in_large.rows - y;  /*assert(width == in.cols);  assert(height == in.rows);*/  if (width != in.cols || height != in.rows) return false;  Mat imageRoi = in_large(Rect_
        
         (x, y, width, height));  addWeighted(imageRoi, 0, in, 1, 0, imageRoi);  Point2f center_diff(in.cols / 2.f, in.rows / 2.f);  Point2f new_center(in_large.cols / 2.f, in_large.rows / 2.f);  Mat rot_mat = getRotationMatrix2D(new_center, angle, 1);  imshow("in_copy", in_large);  waitKey(0);  Mat mat_rotated;  warpAffine(in_large, mat_rotated, rot_mat, Size(in_large.cols, in_large.rows),             CV_INTER_CUBIC);  imshow("mat_rotated", mat_rotated);  waitKey(0);  Mat img_crop;  getRectSubPix(mat_rotated, Size(rect_size.width, rect_size.height),                new_center, img_crop);  out = img_crop;  if (0) {    imshow("out", out);    waitKey(0);    //destroyWindow("out");  }  imshow("img_crop", img_crop);  waitKey(0);  return true;}int main(){	Mat test = imread("./t.png"); 	//imshow("test", test);	Mat out;	Point2f center_diff(test.cols / 2.f, test.rows / 2.f);	rotation(test, out, test.size(), center_diff, -30.f);	return 0;}