274 search results - page 50 / 55 » Anti-forensics of JPEG compression |
ASAP
2007
IEEE
14 years 2 months ago
2007
IEEE
Entropy encoding and decoding is a crucial part of any multimedia system that can be highly demanding in terms of computing power. Hardware implementation of typical compression a...
ICIP
2007
IEEE
14 years 2 months ago
2007
IEEE
In this paper we propose a novel method of applying motion estimation techniques to human authentication by iris matching. By exploiting the inherent differences in vector fields ...
CF
2006
ACM
14 years 1 months ago
2006
ACM
The discrete wavelet transform (DWT) is used in several image and video compression standards, in particular JPEG2000. A 2D DWT consists of horizontal filtering along the rows fo...
ICIP
2005
IEEE
14 years 1 months ago
2005
IEEE
The problem investigated in this paper is identification of sensor that was used to obtain a given digital image. We show that the high-medium frequency component of the sensor pa...
ICWL
2005
Springer
14 years 1 months ago
2005
Springer
We have previously developed a collaborative virtual environment (CVE) for small-group virtual classrooms, intended for distance learning by geographically dispersed students. The...