Abstract
In this paper, we propose a method of complex region selection for digital images using variance selection. In order to improve the imperceptibility of the watermarked image, our method selects blocks based on their variance. The watermark embedding process operates in the discrete fractional random transform and discrete cosine transform domains. The watermark is embedded into the selected blocks, which are transformed into the frequency domain. For security, visual cryptography is used to encode the watermark. The watermark extraction process is the reverse of the embedding process. The experimental results show that the proposed block selection method significantly improves imperceptibility over a randomly chosen block, and that the watermarking algorithm is robust against common attacks.
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Jin, X., Kim, J. (2012). Imperceptibility Improvement of Image Watermarking Using Variance Selection. In: Kim, Th., Mohammed, S., Ramos, C., Abawajy, J., Kang, BH., Ślęzak, D. (eds) Computer Applications for Web, Human Computer Interaction, Signal and Image Processing, and Pattern Recognition. ICHCI WSE SIP 2012 2012 2012. Communications in Computer and Information Science, vol 342. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35270-6_5
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DOI: https://doi.org/10.1007/978-3-642-35270-6_5
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-35269-0
Online ISBN: 978-3-642-35270-6
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