EXTENDING THE VISUAL CRYPTOGRAPHY ALGORITHM USING IMAGE WATERMARKING TECHNIQUE
Journal: INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY (Vol.5, No. 2)Publication Date: 2013-01-01
Authors : Dilip Kotthapalli; V.R. Anitha;
Page : 120-123
Keywords : pixel expansion; watermarking; visual cryptography;
Abstract
Visual cryptography is a secret information sharing technique which shares the information in the form of images. It generates noise-like random pixels on share images to hide secret information which on overlay decrypt the information. This technique is known as conventional visual secret sharing schemes. It suffers a management problem, because of which dealers cannot visually identify each share. This problem is solved by the extended visual cryptography scheme (EVCS), which adds a meaningful cover image in each share. While removing the extra cover image it produces extra noise or degrades the hidden image quality. So we propose a new image watermarking technique in this Visual Cryptography Algorithm that places a small image on the noisy image pair at the bottom right corner. So that the cover images need not be removed and it doesn't degrade ?resolution of the secret image.
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