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Proceedings of 2009 International Workshop on Information Security and Application (IWISA 2009)

Qingdao, China, November 21-22, 2009

Editors: Feng Gao and Xijun Zhu

AP Catalog Number: AP-PROC-CS-09CN004

ISBN: 978-952-5726-06-0

Page(s): 453-456

A Robust Watermarking Algorithm Based on Histogram

        Shumei Wang and Wenbao Hou

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Digital image histogram is an important global feature, in this paper, histogram will be used to embed binary watermark in the space domain. In the watermark embedding process, firstly, the corresponding histogram of image is generated according to the original images’ characteristics, which shows the probability of the corresponding pixel in gray scale; Secondly, the distances between adjacent elements of histogram are calculated, and found their maximum; Then,  the histogram is adjusted according to the maximum and pretreated watermark; Finally, the watermark image is generated. In the watermark extracting process, in accordance with the histogram of watermark image and the original image, and the pixels embedded watermark are found, thereby extracting watermark. The experimental results show that the algorithm has good anti-geometric nature of attacks.

Index Terms

histogram, digital watermarking, invisibility ,PSNR

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