IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PROGRAM, RECORDING MEDIUM, AND IMAGE FORMING APPARATUS

• Main Authors: IMAIZUMI DAISAKU, HIRAYAMA YASUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 29.10.2020
• Subjects: CALCULATING; COMPUTING; CORRECTION OF TYPOGRAPHICAL ERRORS; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; LINING MACHINES; PERFORMING OPERATIONS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

To provide an image processing apparatus that can determine the type of a document from image data and create image data with an appropriate number of output gradations based on the type of the document from the image data.SOLUTION: In an image forming apparatus 1, an image processing apparatus 10 comprises: an image input unit that receives input of image data of a document; a document type determination unit that determines whether the document is a monochrome document or a color document based on the image data, and determines the type of the document based on the image data; a feature amount calculation operation unit that calculates the feature amount from the image data; an output gradation number setting unit that, when the document is the monochrome document, sets any one gradation number from among a plurality of output gradation number candidates as an output gradation number based on the feature amount and the type of the document; and an image processing operation unit that creates image data having the number of gradations of the image data as the set number of output gradations.SELECTED DRAWING: Figure 1 【課題】画像データから原稿の種別を判定し、画像データから原稿の種別に基づく適切な出力階調数の画像データを生成することが可能な画像処理装置等を提供する。【解決手段】画像形成装置１において、画像処理装置１０は、原稿の画像データを入力する画像入力部と、画像データに基づき、原稿がモノクロ原稿かカラー原稿かを判定し、画像データに基づき、原稿の種別を判定する原稿種別判定部と、画像データから特徴量を算出する特徴量算出演算部と、原稿がモノクロ原稿である場合に、特徴量と、原稿の種別とに基づき、複数の出力階調数候補のうち何れか１つの階調数を出力階調数として設定する出力階調数設定部と、画像データの階調数を設定された出力階調数とした画像データを生成する画像処理演算部と、を備える。【選択図】図１