将具有特定标识的信息隐藏在数字化图像、视频、音频等多媒体。是一种基于DCT变换和ARNOLD置乱技术的数字图像水印算法，首先通过Arnold置乱二值水印图像对水印图像进行加密，其次将加密后的图像选择适合的强度，在载体图像中选择低频信号的位置进行嵌入。适合用于简单的图片版权保护。(Information that has a specific identity is hidden in digital image, video, audio and other multimedia. Is a kind of based on DCT transform and ARNOLD scrambling technology of digital image watermarking algorithm, first by ARNOLD scrambling binary watermark image of watermark image is encrypted, then will choose suitable strength, the encrypted image in the image embedded in select the location of the low frequency signal. Suitable for simple image copyright protection.)