说明：  YUV图像中修改Y值的程序. 在这里YUV的格式是先YYYYYYYYYY..然后UUUUUUUUUU...然后VVVVVVVVV... 不是YUVYUVYUVYUV这个格式。运行的时候把YUV格式的图片放到C目录下。
(YUV images Y value of the revised procedures. Here YUV format is first YYYYYYYYYY. . UUUUUUUUUU then ... then ... not YUVYUVYU VVVVVVVVV VYUV this format. Operation moment YUV format photographs into C directory.)