图像处理，2倍放大算法，代码实现2倍放大，以及放大图像的区域选取功能-Image processing, 2 times zoom algorithm, code 2 times magnification, and zoom the image area selection feature

通过频域变换的方法实现图像的放大，该代码是实现对4:2:0YUV视频序列的放大，相对于普通的插值算法有较好的效果。-By frequency-domain transform method for image magnification, the code is to achieve the 4:2:0 YUV video sequence amplification, relative to the general interpolation algorithm has a good effe

该c程序可以实现图像的几何变换，诸如图像平移，水平镜像，垂直镜像，图像转置，图像缩小，图像放大，图像旋转-The c program can realize image geometry transform, such as image translation, horizontal mirror, vertical mirror, transpose images, image, image magnification, image rotation and so on