一种适用于彩色图像版权通知的数字水印算法

A Visible Color Image Watermarking Algorithm for Copyright Notification

在对彩色图像及相关算法进行分析的基础上,提出了一种适用于彩色图像版权通知的可见数字水印算法。该算法同时适用于灰度图像的版权通知。在将彩色图像从RGB空间转换到HSI空间后,根据Sobel梯度算子计算嵌入水印的强度大小;在空域中自适应地嵌入可见水印以实现对图像的版权通知功能。实验结果表明,该算法操作简单且十分有效,嵌入的可见水印很难被去除,对灰度及彩色图像的版权可以起到很好的通知和保护作用。

This paper presents a visible watermarking algorithm for color image＇s copyright notification on the basis of analyzing color images and related algorithms. The algorithm is also adaptive to gray image. By converting color image from RGB to HSI and using the Sobel gradient to obtain the watermark coefficient, the algorithm embeds the visible watermark adaptively to complement image copyright notification. Experimental results verifies that the embedded watermark can hardly be ridden. The method does image copyright notification easily and successfully.