Visually lossless JPEG2000 using adaptive visibility thresholds and visual masking effects

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

1 Scopus citations

Abstract

This paper proposes a method of encoding images in a visually lossless manner using adaptive visibility thresholds and visual masking effects within the framework of JPEG2000. Our adaptive visibility thresholds (VTs) are determined through psychophysical experiments for measuring quantization distortion models, which are based on the variance of wavelet coefficients and the characteristics of the deadzone quantizer of JPEG2000. These VTs are further adjusted using visual masking effects present in the background image where distortion appears, and are used to determine the quantization level in the embedded bit-plane coder for visually lossless coding. The proposed method modifies the distortion calculation and codestream generation stages in the encoder and the resulting codestreams are fully compatible with Part-I of the JPEG2000. Compared with numerically lossless compression of JPEG2000, the proposed method achieves a 60% reduction in bitrate without visual quality degradation. Also, the proposed method yields superior image quality at equivalent bitrates, compared with conventional JPEG2000 encoders.

Original languageEnglish (US)
Title of host publicationConference Record - 43rd Asilomar Conference on Signals, Systems and Computers
Pages563-567
Number of pages5
DOIs
StatePublished - Dec 1 2009
Event43rd Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: Nov 1 2009Nov 4 2009

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other43rd Asilomar Conference on Signals, Systems and Computers
CountryUnited States
CityPacific Grove, CA
Period11/1/0911/4/09

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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  • Cite this

    Oh, H., Bilgin, A., & Marcellin, M. W. (2009). Visually lossless JPEG2000 using adaptive visibility thresholds and visual masking effects. In Conference Record - 43rd Asilomar Conference on Signals, Systems and Computers (pp. 563-567). [5469894] (Conference Record - Asilomar Conference on Signals, Systems and Computers). https://doi.org/10.1109/ACSSC.2009.5469894