How to resize an image to a specific size in OpenCV?

Question

IplImage* img = cvLoadImage(\"something.jpg\");
IplImage* src = cvLoadImage(\"src.jpg\");
cvSub(src, img, img);

But the size of the source image is

Answer 1

Make a useful function like this:

IplImage* img_resize(IplImage* src_img, int new_width,int new_height)
{
    IplImage* des_img;
    des_img=cvCreateImage(cvSize(new_width,new_height),src_img->depth,src_img->nChannels);
    cvResize(src_img,des_img,CV_INTER_LINEAR);
    return des_img;
}