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Imperceptible Watermarking Algorithm Using Block LSB Scheme for Color Images


Posted by: computer science technology
Created at: Friday 22nd of January 2010 02:45:51 PM
Last Edited Or Replied at :Friday 22nd of January 2010 02:45:51 PM
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g, Spatial Domain, Insertion-Extraction Techniques, HVS, LSB, Block Scheme...................[:=> Show Contents <=:]



advantages of separable reversible data hiding in encrypted image wikipedia


Posted by:
Created at: Monday 04th of February 2013 01:07:55 AM
Last Edited Or Replied at :Monday 04th of February 2013 01:07:55 AM
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advantages of se..................[:=> Show Contents <=:]



separable reversible data hiding in encrypted image


Posted by:
Created at: Monday 04th of February 2013 12:19:24 AM
Last Edited Or Replied at :Monday 04th of February 2013 12:19:24 AM
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rajesh/seperable..................[:=> Show Contents <=:]



IMPLEMENTATION OF FHT BASED DIGITAL WATER MARKING TECHNIQUE


Posted by: smart paper boy
Created at: Monday 20th of June 2011 06:09:29 AM
Last Edited Or Replied at :Monday 20th of June 2011 06:09:29 AM
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Where Hn represents and NxN Hadamard matrix, N=2n, n=1, 2, 3….with element values either +1 or -1.


METHOD USED FOR EXTRACTION

performIFHTOnOriginal(): In this method the reverse process of insertion of watermark into original image is carried on. Firstly it gets the values of random points selected for insertion of AC components of watermark image from Keyfile.dat. Next,it gets the values of DC components stored in Keyfikle.dat. Now,the watermarked image is sub-divided in blocks and from the positions of AC inserted points the AC components are retrieved.On combination of t..................[:=> Show Contents <=:]



Imperceptible Watermarking Algorithm Using Block LSB Scheme for Color Images


Posted by: computer science technology
Created at: Friday 22nd of January 2010 02:45:51 PM
Last Edited Or Replied at :Friday 22nd of January 2010 02:45:51 PM
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that embeds data called a watermark into a multimedia object such that watermark can be detected or extracted later to make an assertion about the object. In the proposed model an invisible approach for insertion “ extraction of a digital watermark, a color watermark image into a color host image. The host image is simply divided into some blocks and encrypts with the symmetric key then embeds the color watermark image of all blocks using 2 bit and 1 bit LSB schemes and perceptually it is entirely invisible to Human Visual System. This proposed watermarking framework ensures that the ext..................[:=> Show Contents <=:]



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