50 search results - page 2 / 10 » DCT quantization noise in compressed images |
ICASSP
2011
IEEE
12 years 8 months ago
2011
IEEE
In this paper, we propose a statistical test to discriminate between original and forged regions in JPEG images, under the hypothesis that the former are doubly compressed while t...
TCSV
2002
13 years 4 months ago
2002
A novel frequency-domain technique for image blocking artifact detection and reduction is presented in this paper. The algorithm first detects the regions of the image which presen...
ICIP
2000
IEEE
13 years 9 months ago
2000
IEEE
We have developed a scalable image compression scheme with a good performance-complexity trade-off. Like JPEG, it is based on the 8 × 8 block discrete cosine transform (DCT), but...
ISCAS
1993
IEEE
13 years 9 months ago
1993
IEEE
An image compression system based on transform coding and zonal sampling is presented. It is based on the wellknown Chen-Smith coder, but with an improved technique for transform ...
ICIP
1998
IEEE
14 years 6 months ago
1998
IEEE
Robust transmission of images is achieved by using xed and variable-length coding together without much loss in compression e ciency. The probability distribution function of a DC...