Time-varying wavelet transforms with lifting steps for lossless image compression

Masahiro Okuda, Sanjit K. Mitra, Masaaki Ikehara, Shin ichi Takahashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Most natural images are well modeled as smoothed areas segmented by edges. The smooth areas can be well represented by a wavelet transform with high regularity and with fewer coefficients which requires high-pass filters with some vanishing moments. However for the regions around edges, short highpass filters are preferable. In one recently proposed approach, this problem was solved by switching filter banks using longer filters for smoothed areas of the images and shorter filters for areas with edges. This approach was applied to lossy image coding resulting in a reduction of ringing artifacts. As edges were predicted using neighboring pixels, the nonlinear transforms made the decorrelation more flexible. In this paper we propose a time-varying filterbank and apply it to lossless image coding. In this scheme, we estimate the standard deviation of the neighboring pixels of the current pixel by solving the maximum likelihood problem. The filterbank is switched between three filter banks, depending on the estimated standard deviation.

Original languageEnglish
Title of host publicationIEEE International Conference on Image Processing
PublisherIEEE
Pages48-52
Number of pages5
Volume4
Publication statusPublished - 1999
EventInternational Conference on Image Processing (ICIP'99) - Kobe, Jpn
Duration: 1999 Oct 241999 Oct 28

Other

OtherInternational Conference on Image Processing (ICIP'99)
CityKobe, Jpn
Period99/10/2499/10/28

Fingerprint

Image compression
Wavelet transforms
Pixels
Filter banks
Image coding
High pass filters
Maximum likelihood

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Okuda, M., Mitra, S. K., Ikehara, M., & Takahashi, S. I. (1999). Time-varying wavelet transforms with lifting steps for lossless image compression. In IEEE International Conference on Image Processing (Vol. 4, pp. 48-52). IEEE.

Time-varying wavelet transforms with lifting steps for lossless image compression. / Okuda, Masahiro; Mitra, Sanjit K.; Ikehara, Masaaki; Takahashi, Shin ichi.

IEEE International Conference on Image Processing. Vol. 4 IEEE, 1999. p. 48-52.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Okuda, M, Mitra, SK, Ikehara, M & Takahashi, SI 1999, Time-varying wavelet transforms with lifting steps for lossless image compression. in IEEE International Conference on Image Processing. vol. 4, IEEE, pp. 48-52, International Conference on Image Processing (ICIP'99), Kobe, Jpn, 99/10/24.
Okuda M, Mitra SK, Ikehara M, Takahashi SI. Time-varying wavelet transforms with lifting steps for lossless image compression. In IEEE International Conference on Image Processing. Vol. 4. IEEE. 1999. p. 48-52
Okuda, Masahiro ; Mitra, Sanjit K. ; Ikehara, Masaaki ; Takahashi, Shin ichi. / Time-varying wavelet transforms with lifting steps for lossless image compression. IEEE International Conference on Image Processing. Vol. 4 IEEE, 1999. pp. 48-52
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