Segmentation by color space transformation prior to lifting and integer wavelet transformation for efficient lossless coding and transmission

G. Zamora, Shuyu Yang, M. Wilson, S. Mitra

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

2 Scopus citations

Abstract

Efficient lossless coding and transmission of large color images through bandlimited channels are of growing interest in many applications. Classically lossless coding is performed in the spatial domain by entropy coding of the decorrelated pixels. However, such coding yields only a maximum of 3:1 compression. Recent developments in integer to integer wavelet transform allow multiresolution representation and progressive transmission of images through bandlimited channels starting from the entropy coded lowest resolution image. However, such schemes are able to reduce the bit rate to a limited extent. We present here an efficient automated technique using a simple color space transformation from RGB to HSI that segments and retrieves the color object contour in a fast manner. When such a segmented image is subjected to the integer to integer wavelet transform followed by an adaptive arithmetic coding model, lossless compression up to 20:1 has been achieved for some color images. Due to the substantial decrease in size of the input image to be processed, the execution time of the entire algorithm is reduced drastically. Although the color transformation from RGB to L a b results in better visual appearance as well as more compressibility, this nonlinear transformation is more computationally intensive. Therefore for progressive transmission a simple color transformation scheme is preferable.

Original languageEnglish
Title of host publicationProceedings - 4th IEEE Southwest Symposium on Image Analysis and Interpretation
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages136-140
Number of pages5
ISBN (Electronic)0769505953
DOIs
StatePublished - 2000
Event4th IEEE Southwest Symposium on Image Analysis and Interpretation, SSIAI 2000 - Austin, United States
Duration: Apr 2 2000Apr 4 2000

Publication series

NameProceedings of the IEEE Southwest Symposium on Image Analysis and Interpretation
Volume2000-January

Conference

Conference4th IEEE Southwest Symposium on Image Analysis and Interpretation, SSIAI 2000
CountryUnited States
CityAustin
Period04/2/0004/4/00

Keywords

  • Bit rate
  • Color
  • Decorrelation
  • Entropy coding
  • Image coding
  • Image resolution
  • Image segmentation
  • Propagation losses
  • Spatial resolution
  • Wavelet transforms

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