累積濃度2次微分値に基づく濃淡画像のコントラスト変換 Image Contrast Conversion Based on Accumulated Quadratic Differential Gray-Levels

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This paper proposes a method for contrast improvement to generate an output image with a balance of higher contrast and visual naturalness. In the proposed method, not only a distribution of all gray-levels in an input image but also a distribution of quadratic differential values at all pixels are used for generating Look-Up-Table. Both a histogram to represent a distribution of gray-levels and a histogram to represent a distribution of quadratic differential values are generated. The frequency of a gray-level is divided by the frequency of the corresponding quadratic differential values to avoid from the increase of noises and from the too strong contrast enhancement with the saturation of brightness. The output images by the proposed method had good balance of higher contrast and visual naturalness without many noises and brightness saturation.

収録刊行物

  • 電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society  

    電気学会論文誌. C, 電子・情報・システム部門誌 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society 128(4), 593-599, 2008-04-01 

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10021132057
  • NII書誌ID(NCID)
    AN10065950
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03854221
  • NDL 記事登録ID
    9451393
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-795
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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