IMAGE PROCESSOR, AND COMPUTER PROGRAM

• Main Author: KONDO TOMOYA
• Format: Patent
• Language: English; Japanese
• Published: 01.10.2020
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

To suppress that a color difference is noticeable while suppressing reduction in a printing speed in bidirectional printing.SOLUTION: An image processor acquires an evaluation value which indicates a color difference between an image printed when partial printing for printing a partial image is performed in a first direction along a main scanning direction and an image printed when such partial printing is performed in a second direction by use of object image data. In a specific case that the color difference indicated by the evaluation value of a specific partial image is larger than a reference, the image processor specifies a correction object pixel including a pixel, which causes the color difference, from plural pixels on the specific partial image by use of difference information, executes correction processing for converting a color of the correction object pixel to a color with a small color difference by use of the difference information, and generates partial print data by use of the corrected specific partial image data.SELECTED DRAWING: Figure 8 【課題】双方向印刷において、印刷速度の低下を抑制しつつ、色の相違が目立つことを抑制する。【解決手段】画像処理装置は、対象画像データを用いて、部分画像を印刷する部分印刷が主走査方向に沿う第１方向で行われる場合に印刷される画像と第２方向で行われる場合に印刷される画像との間の色の相違を示す評価値を取得し、特定の部分画像の評価値によって示される色の相違が基準より大きい特定の場合に、相違情報を用いて、特定の部分画像内の複数個の画素の中から色の相違の原因である画素を含む補正対象画素を特定し、相違情報を用いて、補正対象画素の色を色の相違が小さな色に変換する補正処理を実行し、補正済みの特定の部分画像データを用いて部分印刷データを生成する。【選択図】 図８