Discrete Walsh Hadamard transform based visible watermarking technique for digital color images

V. Santhi; Arunkumar Thangavelu

doi:10.1117/12.913308

1 October 2011 Discrete Walsh Hadamard transform based visible watermarking technique for digital color images

V. Santhi, Arunkumar Thangavelu

Proceedings Volume 8285, International Conference on Graphic and Image Processing (ICGIP 2011); 82854T (2011) https://doi.org/10.1117/12.913308
Event: 2011 International Conference on Graphic and Image Processing, 2011, Cairo, Egypt

Abstract

As the size of the Internet is growing enormously the illegal manipulation of digital multimedia data become very easy with the advancement in technology tools. In order to protect those multimedia data from unauthorized access the digital watermarking system is used. In this paper a new Discrete walsh Hadamard Transform based visible watermarking system is proposed. As the watermark is embedded in transform domain, the system is robust to many signal processing attacks. Moreover in this proposed method the watermark is embedded in tiling manner in all the range of frequencies to make it robust to compression and cropping attack. The robustness of the algorithm is tested against noise addition, cropping, compression, Histogram equalization and resizing attacks. The experimental results show that the algorithm is robust to common signal processing attacks and the observed peak signal to noise ratio (PSNR) of watermarked image is varying from 20 to 30 db depends on the size of the watermark.

Citation Download Citation

V. Santhi and Arunkumar Thangavelu "Discrete Walsh Hadamard transform based visible watermarking technique for digital color images", Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82854T (1 October 2011); https://doi.org/10.1117/12.913308

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KEYWORDS

Digital watermarking

RGB color model

Multimedia

Image processing

Data hiding

Internet

Signal to noise ratio

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