基于DWT-DCT的灰度图像数字水印算法
he digital watermarking algorithm of grayscale image based on DWT-DCT
图像数字水印在图像防伪领域有了很广泛的应用。本文针对灰度载体图像，在现有的DWT、DCT算法基础上，提出DWT、DCT同时使用的嵌入和提取水印算法。通过将灰度图像经过一级DWT后的HL1域进行DCT变换，再改变DCT中频系数以嵌入水印信息。最后实验表明，该算法在保持较高峰值信噪比的前提下，对随机噪声，椒盐噪声，都有良好的抵抗效果。
Image watermarking has a very wide range of application in the field of image authentication. In this paper, a new digital watermarking algorithm based on DWT and DCT is proposed to complete watermark embedding and extraction program in grayscale image. By applying DWT transform in host image and then DCT transform in HL1 area, watermark information can be embedded in intermediate frequency coefficients. Final experiments show that the algorithm has strong resistance effect to random noise, salt and pepper noise.
张元钦、马兆丰、辛阳
电子技术应用
灰度图像数字水印WT
grayscale imagedigital watermarkDiscrete Wavelet Transform (DWT)Discrete Cosine Transform (DCT)
张元钦,马兆丰,辛阳.基于DWT-DCT的灰度图像数字水印算法[EB/OL].(2013-07-15)[2025-08-11].http://www.paper.edu.cn/releasepaper/content/201307-223.点此复制
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