616 search results - page 5 / 124 » DCT Based High Quality Image Compression |
IPAS
2007
13 years 10 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...
IDA
2009
Springer
14 years 2 months ago
2009
Springer
In this paper, an algorithm for image coding based on a sparse 3-dimensional Discrete Cosine Transform (3D DCT) is studied. The algorithm is essentially a method for achieving a su...
ICIP
2004
IEEE
14 years 9 months ago
2004
IEEE
A new method, using weighted combinations of shifted transforms, is developed for deringing and deblocking DCT compressed color images. The method shows substantial deringing impr...
ICIP
1999
IEEE
14 years 9 months ago
1999
IEEE
ICASSP
2011
IEEE
12 years 11 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...