187 search results - page 25 / 38 » Directional wavelet transforms and frames |
ISCAS
2007
IEEE
14 years 2 months ago
2007
IEEE
- We describe a robotic vision system that aligns a camera's optical axis with its direction of translation by estimating the focus of expansion. Visual processing is based on...
ICIP
2002
IEEE
14 years 9 months ago
2002
IEEE
In this paper a fully automatic system for embedding visually recognizable watermark patterns to video objects is proposed. The architecture consists of 3 main modules. During the...
ICIP
2008
IEEE
14 years 9 months ago
2008
IEEE
It is now widely acknowledged that wavelets are not very effective in representing images containing distributed discontinuities such as edges. This paper deals with a new multisc...
ICIP
2007
IEEE
13 years 11 months ago
2007
IEEE
In our previous work [1], we proposed a construction of critically sampled perfect reconstruction transforms with directional vanishing moments (DVMs) imposed in the corresponding...
ISCAS
2003
IEEE
14 years 1 months ago
2003
IEEE
In this paper, a robust and efficient digital image watermarking algorithm using the fast Hadamard transform (FHT) is proposed for the copyright protection of digital images. This...