you can use it to change the rgb picture to jpeg picture-you can use it to change the picture to jp rgb eg picture

对于视频编解码感兴趣的初学者非常有帮助，深入学习JPEG编码中RGB转成YUV格式的细节！-For beginners interested in video codec is very helpful, in-depth study details of the JPEG encoder RGB to YUV format!