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Lossless Visible Watermarking with Security

S. Selvakumar, K. Rajakumar

Abstract


Watermarking is an effective and popular technique for discouraging illegal copyright and distribution of copyrighted digital image information. One of the important features of the watermarking technique is the lossless visible watermarking, which will preserve the quality of the watermark and watermarked image. In this paper, a novel method for visible watermarking with a capability of lossless image recovery is proposed. The method is based on one to one compound mapping of image pixel values for overlaying a variety of visible watermarks of arbitrary sizes on cover images. Compound mappings are proven to be reversible, which allows for lossless recovery of original images from watermarked images. Different types of visible watermarks, including opaque monochrome and translucent full color ones are embedded as application of the proposed generic approach. A two fold monotonically increasing compound mapping is created and proved to yield more distinctive visible watermarks in the watermarked images and to be proposed deals with the combination of text, image and key watermarking. To overcome the defects in quality of image and security the new approach, a lossless visible watermarking and watermark removal for lossless image recovery is proposed.


Keywords


Lossless Visible Watermarking, One To One Compound Mapping, Translucent Watermark, Wavelet Transform, Two Fold Monotonically Increasing, Key Watermarking.

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References


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