3. 把一幅灰度图像进行旋转。

#include <opencv/cv.h>

#include <opencv/highgui.h>

IplImage *rotateImage(const IplImage *src, int angleDegrees)

{

IplImage *imageRotated = cvCloneImage(src);

if (angleDegrees != 0){

CvMat* rot_mat = cvCreateMat(2, 3, CV_32FC1);

CvPoint2D32f center = cvPoint2D32f(cvGetSize(imageRotated).width / 2, cvGetSize(imageRotated).height / 2);

cv2DRotationMatrix(center, angleDegrees, 1, rot_mat);

cvWarpAffine(src, imageRotated, rot_mat);

}

return imageRotated;

}

 

 

int main()

{

IplImage* img;

IplImage* rotated_img;

int angle = 0;

img = cvLoadImage("6013202130.jpg");

rotated_img = rotateImage(img, 223);

cvNamedWindow("选做-图片旋转", CV_WINDOW_AUTOSIZE);

cvNamedWindow("原图", CV_WINDOW_AUTOSIZE);

cvShowImage("原图", img);

cvShowImage("选做-图片旋转", rotated_img);

cvWaitKey(0);//等待按键

cvDestroyWindow("原图");

cvDestroyWindow("选做-图片旋转");

cvReleaseImage(&img);

cvReleaseImage(&rotated_img);

return 0;

}