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水印是将身份确认信息或保密信息镶嵌于图像中的一种技术 ,可靠的水印会为信息的安全提供有力的保障 .本文提出了一种隐藏数字水印的新方法 ,该方法将水印作为二值图像来处理 ,充分考虑了人眼视觉模型 (HVS) ,并将其与图像的DCT变换相结合来选择位于中频区域的DCT系数 ,通过修改这些系数来隐藏水印图像 .实验表明这种新方法可以很好地在降低原始图像变换后视觉失真和提取出的被隐藏水印图像的失真两方面都达到较好的效果 .实验表明这是一种很有发展前景的新方法 .
Watermarking is a technique of embedding identity confirmation or confidential information in the image, and reliable watermarking will provide a powerful guarantee for the security of information.This paper presents a new method of concealing digital watermarking, which uses watermark as binary Image, the HVS is fully considered and combined with the DCT transform of the image to select the DCT coefficients located in the intermediate frequency region, and the watermark image is hidden by modifying these coefficients.Experiments show that this new method can It is a good method to reduce the visual distortion after the original image transform and the distortion of the hidden watermark image extracted from the original image.Experiments show that this is a promising new method.