Performance of Error Filters in Halftone Visual Cryptography
نویسندگان
چکیده
منابع مشابه
Impact of Error Filters on Shares in Halftone Visual Cryptography
Visual cryptography encodes a secret binary image (SI) into shares of random binary patterns. If the shares are xeroxed onto transparencies, the secret image can be visually decoded by superimposing a qualified subset of transparencies, but no secret information can be obtained from the superposition of a forbidden subset. The binary patterns of the shares, however, have no visual meaning and h...
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Visual cryptography encodes a secret binary image (SI) into shares of random binary patterns. The decoding process of a visual cryptography scheme, which differs from traditional secret sharing, does not need any cryptographic algorithms like symmetric and asymmetric algorithms. Visual cryptography is based on the images and is obtained by sending pixel information and stacking of pixels for re...
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R.Charanya, T. Vijayan Abstract: In this Paper, a method of Information hiding & Piracy protection in Image processing is discussed. Visual cryptography & Digital watermarking helps in enables Information hiding, copyright & piracy protection. Here, a technique involving halftone visual cryptography along with watermarking is proposed to achieve visual cryptography via half toning. Digital wate...
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Extended Visual Cryptography (EVC) concept provides meaningful shares instead of non meaningful shares. In this paper we proposed an algorithm based on EVC which enhances the contrast of the recovered secret image. Here the size of image visible on shares is taken to be three times as that of secret image, both the images are assumed in grey level. In the proposed algorithm secret image and the...
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Visual secret sharing is the technique that divide the secret image into n multiple shares. Each share constitutes some information and when k shares out of n stack together the secret will reveal. However; less than k shares are not work. The beauty of the visual secret sharing scheme is its decryption process i.e. to decrypt the secret using Human Visual System (HVS) without any computation. ...
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ژورنال
عنوان ژورنال: International Journal on Cryptography and Information Security
سال: 2012
ISSN: 1839-8626
DOI: 10.5121/ijcis.2012.2313