一种调色板图像的脆弱水印和数据隐藏算法

Data Hiding and Fragile Watermark Scheme for Palette Images

调色板图像与真彩图像相比具有色彩量化、调色板独立等特点。调色板图像作为被广泛使用的媒体类型,但直接针对它的数字水印研究却非常少。文章提出了一种在调色板图像中同时嵌入脆弱水印和隐藏数据的新算法,在分成多个3×3的图像块的中心区域嵌入脆弱水印,同时利用块中象素间的相互关系来隐藏数据。试验结果表明,该算法具有很好的可行性和实用性,可应用于电子签名。

This paper presents a novel method for simultaneously embedding fragile watermark and data in the digital palette images.The magnitude between two pixels is utilized for hiding data,and simultaneously fragile watermark is embedded in the central pixel of every 3 ×3 block.Experimental results show that feasibility and practicability of the proposed approaches.