摘要
本文提出了一种新的用于图像数字版权的自适应水印方案,在该方案中,使用混沌映射将商标图像的像素在空间区域中进行随机置乱,然后将置乱的信息埋入在图像的DCT变换域中。为了使水印的分布集中在图像显著的边缘特征中,提出了基于图像像素的模糊熵测度算法,对图像特征系数的修改则是局部自适应的,使得水印埋入的强度随着图像局部变化而变化。嵌入的商标能够在随后的相关检测以及重构中得到很好的恢复以表明数字产品的版权。
A novel scheme of digital watermarking for image copyright is proposed. By the method, the logo pixels are mixed by the chaotic map in a specified spatial domain, and embedded in the DCT coefficients, to lay the watermarking information in the notable areas of the features of the image, an algorithm of fuzzy entropy estimation is proposed, the embedding watermark strength is characteristic with the statistic of the local feature coefficients of the original image. The logo can be reconstructed as well as statistical detected certainty from the watermarked image, and will provide indicating the copyright existence.
出处
《信号处理》
CSCD
2004年第5期465-469,共5页
Journal of Signal Processing
