36 search results - page 1 / 8 » Halftone visual cryptography |
166
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ICIP
2003
IEEE
16 years 4 months ago
2003
IEEE
This paper considers the problem of encoding a secret binary image SI into n shares of meaningful halftone images within the scheme of visual cryptography (VC). Secret pixels enco...
113
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ICASSP
2009
IEEE
15 years 10 months ago
2009
IEEE
This paper introduces a color visual cryptography encryption method that produces meaningful color shares via visual information pixel (VIP) synchronization and error diffusion ha...
137
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SIBGRAPI
2003
IEEE
15 years 8 months ago
2003
IEEE
Abstract. Authentication watermarking is a hidden data inserted into an image, in order to detect any alterations. It seems to be almost impossible to design a really secure authen...
120
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INFORMATICALT
2007
15 years 3 months ago
2007
This paper proposes a reversible data hiding method for error diffused halftone images. It employs statistics feature of pixel block patterns to embed data, and utilizes the HVS ch...
129
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CGF
1999
15 years 2 months ago
1999
The display of images on binary output hardware requires a halftoning step. Conventional halftoning algorithms approximate image values independently from the image content and of...