中文说明：图像图像处理，图像压缩，基于dct变换的可逆水印算法，根据水印信息量，依序选取适当数目的分块，对所选去分块进行dct变换
English Description：
Image image processing, image compression, reversible watermarking algorithm based on DCT transform, according to the amount of watermark information, in order to select the appropriate number of blocks, the selected block for DCT transformation