Histogram Modification and Wavelet Transform for High Performance Watermarking. (10th November 2012)

• Record Type: Journal Article
• Authors: Juang, Ying-Shen; Ko, Lu-Ting; Chen, Jwu-E; Shieh, Yaw-Shih; Sung, Tze-Yun; Hsin, Hsi Chin
• Other Names: Chen Sheng-yong Academic Editor.
• Is Part Of: Mathematical problems in engineering. Volume 2012(2012)
• Publication Date: 2012-11-10
• Subjects: Engineering mathematics -- Periodicals; 510.2462
• DOI: 10.1155/2012/164869
• Languages: English
• ISSNs: 1024-123X

Abstract

Abstract : This paper proposes a reversible watermarking technique for natural images. According to the similarity of neighbor coefficients' values in wavelet domain, most differences between two adjacent pixels are close to zero. The histogram is built based on these difference statistics. As more peak points can be used for secret data hiding, the hiding capacity is improved compared with those conventional methods. Moreover, as the differences concentricity around zero is improved, the transparency of the host image can be increased. Experimental results and comparison show that the proposed method has both advantages in hiding capacity and transparency.