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Color image processing method and processing apparatus

Assignee: Keio University
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Filing: 2000-11-02
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Granted: —
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Expires: 2020-11-02
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 電子的撮像装置で生成したカラー画像データ をモニタやプリンタに出力する際に消失する情報量を自 動的に低減する。 【解決手段】 カラー原色画像から、円筒座標系で規格 化した色相/彩度/明度空間の明度画像を生成する色形 式変換手段3と、前記明度画像のテクスチャを解析し、 前記解析結果に基づいて前記明度画像を複数の領域に分 割する領域分割手段6と、前記分割された領域毎のヒス トグラムを平滑化することにより前記明度画像の濃度変 換曲線を作成する濃度変換曲線作成手段7と、前記濃度 変換曲線を用いて明度画像の濃度変換を行う濃度変換手 段8と、前記濃度変換を受けた明度画像を用いてカラー 原色画像を生成する色形式逆変換手段5とを備えてい る。 (57) [Problem] To automatically reduce the amount of information lost when color image data generated by an electronic imaging device is output to a monitor or a printer. SOLUTION: A color format conversion means 3 for generating a lightness image in a hue / saturation / lightness space standardized by a cylindrical coordinate system from a color primary color image, and analyzing a texture of the lightness image, Area dividing means 6 for dividing the brightness image into a plurality of regions based on the analysis result, and density conversion curve creation for creating a density conversion curve of the brightness image by smoothing a histogram for each of the divided regions Means 7, density conversion means 8 for performing density conversion of a lightness image using the density conversion curve, and color format inverse conversion means 5 for generating a color primary color image using the lightness image subjected to the density conversion. ing.

Inventors

  • 👤 Masato Nakajima
  • 👤 真人 中島
  • 👤 Shingo Ando
  • 👤 慎吾 安藤
  • 👤 Satoko Imai
  • 👤 聡子 今井

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-09 19:43
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