17 search results - page 3 / 4 » Steganography: DCT Coefficients Reparation Technique in JPEG... |
ICIP
2008
IEEE
14 years 7 months ago
2008
IEEE
A progressive image compression scheme is investigated using reversible integer discrete cosine transform (RDCT) which is derived from the matrix factorization theory. Previous te...
ICIP
2002
IEEE
14 years 7 months ago
2002
IEEE
We proposed a blind watermarking technique to embed the watermark in JPEG compressed domain. Low frequency DCT coefficients are extracted to form an M-dimensional vector. Watermar...
IWDW
2004
Springer
13 years 11 months ago
2004
Springer
: Invertible authentication techniques have been used in some special applications (such as medical or military) where original data can be recovered after authenticated. In this p...
ICMCS
2005
IEEE
13 years 11 months ago
2005
IEEE
In this paper, a method for content-based retrieval of JPEG images is presented, utilizing features directly from the discrete cosine transform (DCT) domain. Image indexing is ach...
ICIP
2001
IEEE
14 years 7 months ago
2001
IEEE
In this paper we propose a new watermarking technique where the watermark is embedded according to two keys. The first key is used to embed a code bit in a block of pixels. The se...