Dwt Based Reversible Watermarking For Lossless Recovery
Published: 2012
Author(s) Name: V. Uma, K. Vanishree
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Abstract
A novel method for generic visible watermarking with a capability of lossless
video recovery is proposed. The method is based on the use of deterministic one-to-one
compound mappings of frame pixel values for overlaying a variety of visible watermarks
of arbitrary sizes on cover videos. The compound mappings are proved to be reversible,
which allows for lossless recovery of original video from watermarked video. The
mappings may be adjusted to yield pixel values close to those of desired visible
watermarks. The visible watermarks, the opaque monochrome watermark, are embedded
as applications of the proposed generic approach. A DWT (Discrete Wavelet Transform)
has been proposed to provide effective robustness for lossless recovery of image. Security
protection measures by parameter and mapping randomizations have also been proposed
to deter attackers on illicit image recoveries. Experimental results demonstrating the
effectiveness of the proposed approach are also included.
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