State-Space Approach to Roundoff Error Analysis of Fractal Image Coding

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概要

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• 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.

• 社団法人電子情報通信学会の論文
• 1997-01-25

著者

• Higuchi Tatsuo

  Graduate School Of Information Sciences Tohoku University

• Lee Choong

  Multimedia Technology Research Laboratory

• Higuchi Tatsuo

  Graduate School Of Information Sciences And Faculty Of Engineering Tohoku University

• KAWAMATA Masayuki

  Graduate School of Engineering, Tohoku University

• LEE Choong

  Graduate School of Information Sciences, Tohoku University

• Kawamata Masayuki

  Graduate School Of Engineering Tohoku University

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