Beyond Wavelets and JPEG2000. Tony Lin Peking University, Beijing, China Dec. 17, 2004. Outline. Wavelets and JPEG2000: A brief review Beyond wavelets and JPEG2000 My exploration Directional wavelet construction Adaptive wavelet selection Inter-subband transform Outlook. References.
Peking University, Beijing, China
Dec. 17, 2004
"Who controls the past,
ran the Party slogan,
controls the future;
who controls the present,
controls the past."
-- George Orwell, 1984.
Orthogonal vs. Biorthogonal-- B. Usevitch, "A turorial on modern lossy wavelet image compression: foundations of JPEG 2000," IEEE Trans. Sig. Proc. Mag., 2001.
Five DWT decompositions of Barbara image
Secret 2 for the coding efficiency of JPEG2000: -- EBCOT: Fractional bitplane coding and Multiple contexts to implement a high performance arithmetic coder
"My dream is to solve problems, with or without wavelets"
-- Bruno Torresani, 1995
"There have been too many pictures of Lena, and too many bad wavelet sessions at meetings."
-- M. Vetterli, 1995.
"If you steal from one author, it's plagiarism;
if you steal from many, it's research"
-- Wilson Mizner, 1953.
443 bytes (30:1), 35.70dB
434 bytes (30:1), 35.49dB
Saving several cleanup passes
"Predicting is hard, especially about the future."
-- Victor Borge, quoted by Philip Kotler.