State-space approach to roundoff error analysis of fractal image coding

Choong Ho Lee, Masayuki Kawamata, Tatsuo Higuchi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Roundoff error due to iterative computation with finite wordlength degrades the quality of decoded images in fractal image coding that employs a deterministic iterated function system. This paper presents a state-space approach to roundoff error analysis of fractal image coding for grey-scale images. The output noise variance matrix and the noise matrix are derived for the measures of error and the output noise variance is newly defined as the pixel mean of diagonal elements of the output noise matrix. A quantitative comparison of experimental roundoff error with analytical result is made for the output noise variance. The result shows that our analysis method is valid for the fractal image coding. Our analysis method is useful to design a real-time and low-cost decoding hardware with finite wordlength for fractal image coding.

Original languageEnglish
Pages (from-to)159-165
Number of pages7
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE80-A
Issue number1
Publication statusPublished - 1997 Jan 1

Keywords

  • Fractal image coding
  • Iterated function systems
  • Roundoff error analysis
  • State-space approach

ASJC Scopus subject areas

  • Signal Processing
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering
  • Applied Mathematics

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