中文说明：本算法是基于DCT变换的数字水印算法，包括水印图像的嵌入与提取过程，方便有需要的朋友借鉴下载，也希望能有更好的资源可以共享，大家一起学习
English Description：
This algorithm is based on the DCT transform digital watermarking algorithm, including the watermark image embedding and extraction process, to facilitate the need for friends to learn to download, also hope to have better resources can be shared, we learn together