PROBLEM TO BE SOLVED: To provide an image processor capable of precisely recognizing characters even when an input image includes a high brightness area due to a mirror reflection etc.SOLUTION: The image processor performs a pre-processing on an input image before image recognition processing. The image processor includes: generation means that generates a histogram of brightness value of the input image; determination means that determines a reference value of the brightness value based on the histogram and determines a high brightness pixel which is a pixel having a brightness value larger than the reference value; and conversion means that converts the brightness value of the high brightness pixel into a brightness value smaller than the reference value.SELECTED DRAWING: Figure 4

    【課題】入力画像中に鏡面反射光などによる高輝度領域が存在する場合であっても、高精度な文字認識を可能とする。【解決手段】画像認識処理の前処理を入力画像に施す画像処理装置であって、入力画像の輝度値のヒストグラムを生成する生成手段と、前記ヒストグラムに基づいて輝度値の基準値を決定し、当該基準値よりも大きい輝度値を有する画素である高輝度画素を決定する決定手段と、前記高輝度画素の輝度値を、前記基準値以下の輝度値に変換する変換手段と、を備える。【選択図】図4


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    Titel :

    IMAGE PROCESSOR, CHARACTER RECOGNIZER, IMAGE PROCESSING METHOD AND PROGRAM


    Weitere Titelangaben:

    画像処理装置、文字認識装置、画像処理方法、およびプログラム


    Beteiligte:
    HYUGA TADASHI (Autor:in) / AIZAWA CHITEI (Autor:in) / HAMASO HIDETO (Autor:in)

    Erscheinungsdatum :

    2016-05-23


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    G06K Erkennen von Daten , RECOGNITION OF DATA / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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