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» Adaptive Coding of DCT Coefficients by Golomb-Rice Codes
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ICIP
2001
IEEE
15 years 11 months ago
Hierarchical watermarking depending on local constraints
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...
Christopher D. Coltman, Adrian G. Bors
76
Voted
PAMI
2007
152views more  PAMI 2007»
14 years 9 months ago
DCT-Based Iris Recognition
—This paper presents a novel iris coding method based on differences of discrete cosine transform (DCT) coefficients of overlapped angular patches from normalized iris images. Th...
Donald M. Monro, Soumyadip Rakshit, Dexin Zhang
ICIP
2008
IEEE
15 years 11 months ago
A perceptual metric for blind measurement of blocking artifacts with applications in transform-block-based image and video codin
In this paper, we analyze the formation of blocking artifacts as a result of quantization of the discrete cosine transform (DCT) coefficients. These artifacts are known to be the ...
Koohyar Minoo, Truong Q. Nguyen
ISCAS
2003
IEEE
113views Hardware» more  ISCAS 2003»
15 years 2 months ago
Optimum word length allocation for multipliers of integer DCT
Recently, the integer DCT (Int-DCT), which has the rounding operations in the lifting structure, is attracting many researchers' attention as an effective method for DCT base...
Masahiro Iwahashi, Osamu Nishida, Somchart Chokcha...
ICIP
2009
IEEE
14 years 7 months ago
New CAVLC design for lossless intra coding
The context-based adaptive variable length coder (CAVLC) in H.264/AVC is not appropriate for lossless video coding because it was designed for lossy video coding. Since statistica...
Jin Heo, Seung Hwan Kim, Yo-Sung Ho