SSWMC
2004
13 years 6 months ago
2004
The image authentication system SARI proposed by Lin and Chang passes JPEG compression and rejects other malicious manipulations. Some vulnerabilities of the system have been repo...
IPCV
2008
13 years 6 months ago
2008
- We report classification experiments using the pilot Infant COPE database of neonatal facial expressions. Two sets of DCT coeffiecents were used to train a neural network simulta...
IPAS
2007
13 years 7 months ago
2007
A practical impossibility of prediction of signs of DCT coefficients is generally accepted. Therefore each coded sign of DCT coefficients occupies usually 1 bit of memory in compr...
IH
2004
Springer
13 years 10 months ago
2004
Springer
In this paper, we introduce a new feature-based steganalytic method for JPEG images and use it as a benchmark for comparing JPEG steganographic algorithms and evaluating their embe...
SCIA
2005
Springer
13 years 10 months ago
2005
Springer
Abstract. DCT based image compression using blocks of size 32x32 is considered. An effective method of bit-plane coding of quantized DCT coefficients is proposed. Parameters of pos...
ISCAS
2007
IEEE
13 years 11 months ago
2007
IEEE
—Discrete Cosine Transform (DCT) has been widely used in image/video coding systems, where zigzag scan is usually employed for DCT coefficient organization. However, due to local...
ICASSP
2008
IEEE
13 years 11 months ago
2008
IEEE
The discrete cosine transform (DCT) is widely used in image/video coding standards. However, since most DCT coefficients will be quantized to zeros, a large number of redundant co...
ICIP
1998
IEEE
14 years 6 months ago
1998
IEEE
ICIP
2002
IEEE
14 years 6 months ago
2002
IEEE
A transform approximation is explored for speeding up the software compression of images and video. It is used to replace the regular DCT whenever only few DCT coefficients are ac...
ECCV
2006
Springer
14 years 6 months ago
2006
Springer
Abstract. The steady improvement in image/video editing techniques has enabled people to synthesize realistic images/videos conveniently. Some legal issues may occur when a doctore...