The Effect of Image Noise on Sharpness Perception : Analysis Using Uni-frequency Pattern

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  • シャープネス知覚に与えるノイズの影響 : 単一周波数パターンを用いた解析(画像技術,視覚・画質関連,その他一般)
  • シャープネス知覚に与えるノイズの影響--単一周波数パターンを用いた解析
  • シャープネス チカク ニ アタエル ノイズ ノ エイキョウ タンイツ シュウハスウ パターン オ モチイタ カイセキ

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In this research, we investigated the effect of image noise on perceived sharpness. To avoid the difficulty in characterizing natural image, we used as stimuli achromatic 1D sinusoidal grating and 2D uni-frequency pattern, which is one of the simplest forms of image, with various amounts of white Gaussian noise added. Then observers were asked to evaluate their sharpness. For 1D grating stimuli, sharpness seemed independent of noise amount, while, for 2D patterns, it increased with increasing noise. We think this is in line with the observation in our preceding research that sharpness increase by image noise is rather due to enhanced texture than due to enhanced edge.

Journal

  • ITE Technical Report

    ITE Technical Report 32.40 (0), 29-31, 2008

    The Institute of Image Information and Television Engineers

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