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JP2000332995A Expired / Lapsed JP ⏱️ 0.0 years remaining

Image data generation method and recording medium

Assignee: Ricoh Co Ltd
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Filing: 1999-05-26
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Granted: —
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Expires: 2019-05-26
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 ラスター展開とイメージの解像度変換が高速 で、中間調処理、転送データ量、画質が中程度である、 中間調処理と解像度変換を同時に行う。 【解決手段】 閾値マトリックス2の各要素には、複数 の閾値が値順にソートされて配置されている。画像デー タ1の各画素と、画素に対応したマトリックスの要素内 の複数の閾値とを比較して、画素値を階調数に変換す る。画素と階調数に対応した符号パターン3を選択し、 これにより、解像度の高いプリントデータ4を出力す る。 (57) [Summary] [Problem] Raster expansion and image resolution conversion are fast, and halftone processing, transfer data amount, and image quality are medium. Halftone processing and resolution conversion are performed simultaneously. SOLUTION: In each element of a threshold matrix 2, a plurality of thresholds are sorted and arranged in order of value. Each pixel of the image data 1 is compared with a plurality of threshold values in a matrix element corresponding to the pixel, and the pixel value is converted into a gradation number. Select the code pattern 3 corresponding to the pixel and the number of gradations, As a result, print data 4 with high resolution is output.

Inventors

  • 👤 Hiroyuki Sakuyama
  • 👤 宏幸 作山

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-09 14:36
CPC Classifications
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