36 search results - page 1 / 8 » Halftone visual cryptography |
ICIP
2003
IEEE
14 years 10 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...
ICASSP
2009
IEEE
14 years 3 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...
SIBGRAPI
2003
IEEE
14 years 1 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...
INFORMATICALT
2007
13 years 8 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...
CGF
1999
13 years 8 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...