Imprecise reversible visible watermarking
Tóm tắt
Using the program visible digital, a perceptible watermark is added to an image to prevent illicit use of multimedia content and to provide copyright and copy protection for the author. There are numerous applications that require user authentication to make the original image content available. If the original image is recovered from the watermarked image successfully, then the scheme is said to be a reversible watermarking scheme. However, most of the reversible visible watermarking schemes found in the current literature do not preserve visual quality of image. In this investigation, we propose a novel reversible and visible watermarking method that is suitable for both grey and colour images. In our approach, we use the complex mapping of pixels via embedding combined with a scaling factor derived from the contrast-sensitive function of the original image. We then prove experimentally that our scheme is advantageous over the previous works in this field. Furthermore, we compare the performance of proposed work with other state-of-the-art under various parameters.
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