摘要： 针对多通道水印模型限制鲁棒水印容量和降低水印图像隐形性问题，提出基于零参考水印的多通道数字图像水印方案。该方案基于量化函数定义各水印通道的零参考水印。检测时可以提取参考水印，比较零参考水印和提取的参考水印，计算各水印通道的失真率，根据失真率计算嵌入的鲁棒水印。实验结果表明，该方案在保持水印图像隐形性的前提下，提高了水印提取准确度。

关键词: 数字水印, 版权保护, 鲁棒水印, 参考水印, 零参考水印

Abstract: Aiming at the problem as low robust watermark capacity and week imperceptibility of watermark images in multi-channel watermark scheme, this paper proposes a multi-channel image digital watermark scheme based on zero reference watermark. In this scheme, zero reference watermark is defined based on quantization function. During watermark detection, it extracts reference watermarks, computes distortion rates of watermark channels by comparing zero reference watermarks and the extracted reference watermarks, and computes robust watermarks according to the distortion rates. Experimental results show that this scheme improves the accuracy of extracted watermarks without losing its imperceptibility.

Key words: digital watermark, copyright protection, robust watermark, reference watermark, zero reference watermark

中图分类号: 

• TP309