基于混沌理论，对作为水印的灰度图像进行了加密的处理。
Based on chaos theory, the gray image as watermark is encrypted.
解决多媒体信息安全问题的两种有效手段是加密技术和数字水印技术。
Two effective ways to solve the problem are encryption and digital watermarking technology.
解决多媒体信息安全问题的两种有效手段是加密技术和数字水印技术。
Two effective ways to solve the problem are encryption and digital watermarking technology.
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