Order Space-Based Morphology for Color Image Processing

DOI DOI 機関リポジトリ (HANDLE) 機関リポジトリ (HANDLE) Web Site ほか2件をすべて表示 一部だけ表示 参考文献44件 オープンアクセス
  • 井上, 光平
    九州大学大学院芸術工学研究院メディアデザイン部門
  • 小野, 直樹
    九州大学大学院芸術工学研究院メディアデザイン部門
  • 原, 健二
    九州大学大学院芸術工学研究院メディアデザイン部門

書誌事項

タイトル別名
  • Local Contrast-Based Pixel Ordering for Exact Histogram Specification

説明

Histogram equalization is one of the basic image processing tasks for contrast enhancement, and its generalized version is histogram specification, which accepts arbitrary shapes of target histograms including uniform distributions for histogram equalization. It is well known that strictly ordered pixels in an image can be voted to any target histogram to achieve exact histogram specification. This paper proposes a method for ordering pixels in an image on the basis of the local contrast of each pixel, where a Gaussian filter without approximation is used to avoid the duplication of pixel values that disturbs the strict pixel ordering. The main idea of the proposed method is that the problem of pixel ordering is divided into small subproblems which can be solved separately, and then the results are merged into one sequence of all ordered pixels. Moreover, the proposed method is extended from grayscale images to color ones in a consistent manner. Experimental results show that the state-of-the-art histogram specification method occasionally produces false patterns, which are alleviated by the proposed method. Those results demonstrate the effectiveness of the proposed method for exact histogram specification.

収録刊行物

  • Journal of Imaging

    Journal of Imaging 8 (9), 247-, 2022-09-10

    MDPI (Multidisciplinary Digital Publishing Institute)

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