69 search results - page 6 / 14 » Algebraic visual cryptography scheme for color images |
TIFS
2008
13 years 7 months ago
2008
This paper presents two vector watermarking schemes that are based on the use of complex and quaternion Fourier transforms and demonstrates, for the first time, how to embed waterm...
IWVF
2001
Springer
14 years 2 days ago
2001
Springer
Abstract. Most CBIR systems use low-level visual features for representation and retrieval of images. Generally such methods suffer from the problems of high-dimensionality leadin...
3DPVT
2004
IEEE
13 years 11 months ago
2004
IEEE
An appearance-based face authentication system integrating 2D color or intensity images and 3D data is presented in this paper. The proposed system is based on a low-cost 3D and c...
ICIP
2005
IEEE
14 years 9 months ago
2005
IEEE
Luminance information plays an important role in dictating the quality of a color image, and some existing color filter array (CFA) demosaicking methods achieve superiority by fir...
SIBGRAPI
2003
IEEE
14 years 27 days 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...