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ICIP
2003
IEEE
14 years 1 months ago
Reversible watermark using difference expansion of triplets
A new reversible watermarking algorithm based on the difference expansion of colored images has been developed. Since the watermark is completely reversible, the original image ca...
Adnan M. Alattar
ISVLSI
2002
IEEE
155views VLSI» more  ISVLSI 2002»
14 years 24 days ago
A High Speed Shift-Invariant Wavelet Transform Chip for Video Compression
Wavelet-based video compression can provide improved codec and bit rates. The shift-variance problem of the discrete wavelet transform on image sequences, however, may cause large...
Henry Y. H. Chuang, David P. Birch, Li-Chang Liu, ...
STACS
2001
Springer
14 years 9 days ago
Small PCPs with Low Query Complexity
Most known constructions of probabilistically checkable proofs (PCPs) either blow up the proof size by a large polynomial, or have a high (though constant) query complexity. In thi...
Prahladh Harsha, Madhu Sudan
FSE
2006
Springer
159views Cryptology» more  FSE 2006»
13 years 11 months ago
Collisions and Near-Collisions for Reduced-Round Tiger
We describe a collision-finding attack on 16 rounds of the Tiger hash function requiring the time for about 244 compression function invocations. Another attack generates pseudo-ne...
John Kelsey, Stefan Lucks
SIGGRAPH
1995
ACM
13 years 11 months ago
Pyramid-based texture analysis/synthesis
This paper describes a method for synthesizing images that match the texture appearanceof a given digitized sample. This synthesisis completely automatic and requires only the “...
David J. Heeger, James R. Bergen