Image Wavelet Coding Systems: Part II of Set Partition Coding and Image Wavelet Coding Systems

  • Authors:
  • William A. Pearlman;Amir Said

  • Affiliations:
  • -;-

  • Venue:
  • Foundations and Trends in Signal Processing
  • Year:
  • 2008

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Abstract

This monograph describes current-day wavelet transform imagecoding systems. As in the first part, steps of the algorithms areexplained thoroughly and set apart. An image coding system consistsof several stages: transformation, quantization, set partition oradaptive entropy coding or both, decoding including rate control,inverse transformation, de-quantization, and optional processing(see Figure 1.6). Wavelet transform systems can provide manydesirable properties besides high efficiency, such as scalabilityin quality, scalability in resolution, and region-of-interestaccess to the coded bitstream. These properties are built into theJPEG2000 standard, so its coding will be fully described. SinceJPEG2000 codes subblocks of subbands, other methods, such as SBHP(Subband Block Hierarchical Partitioning) [3] and EZBC (EmbeddedZero Block Coder) [8], that code subbands or its subblocksindependently are also described. The emphasis in this part is theuse of the basic algorithms presented in the previous part in waysthat achieve these desirable bitstream properties. In this vein, wedescribe a modification of the tree-based coding in SPIHT (SetPartitioning In Hierarchical Trees) [15], whose output bitstreamcan be decoded partially corresponding to a designated region ofinterest and is simultaneously quality and resolution scalable.This monograph is extracted and adapted from the forthcomingtextbook entitled Digital Signal Compression: Principles andPractice by William A. Pearlman and Amir Said, CambridgeUniversity Press, 2009.