• 学术论文 •

基于奇偶校验的块误差分散半调水印算法

1. 1. 西安电子科技大学 计算机学院，陕西 西安 710071；2. 西安石油大学 计算机学院，陕西 西安 710065
• 出版日期:2014-12-25 发布日期:2014-12-15
• 基金资助:
国家自然科学基金资助项目（61100156）；国家“十二五”预研基金资助项目（513160702）

Halftone image watermarking with block-directed parity-matched error diffusion

• Online:2014-12-25 Published:2014-12-15

Abstract: A robust halftone image watermarking method was proposed. The method was developed in parity domain based on pixel block. Especially, the parity sum of a pixel block was defined by comparing the average of the pixel block with an image-dependent threshold. By altering the pixel block’s parity based on noise-balanced block error diffusion, watermark was spread into the host image. Watermark was retrieved by employing each pixel block’s parity and majority voting strategy, not referring to the original image. Compared with the state-of-the-art method in parity domain, the results indicate that the proposed method has high watermark rate and watermark rate flexibility. Moreover, it is capable of extracting watermark directly from the attacked watermarked image without quantizing it into a halftone image. And it can achieve high robustness against common attacks and print-and-scan attack of different types of printers and scanners.