IMAGE READING DEVICE

To determine the abnormality of a scanned image with high accuracy.SOLUTION: A CPU 114 acquires a first scanned image output from reading units 310a, 310b without passing paper in a state in which an opposing roller 313 is positioned at a first distance La with respect to a contact glass 315. When t...

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Bibliographic Details
Main Author HAMADA SHUHEI
Format Patent
LanguageEnglish
Japanese
Published 11.10.2021
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:To determine the abnormality of a scanned image with high accuracy.SOLUTION: A CPU 114 acquires a first scanned image output from reading units 310a, 310b without passing paper in a state in which an opposing roller 313 is positioned at a first distance La with respect to a contact glass 315. When there is an abnormality in the first scanned image, the CPU 114 determines that there is dust, and acquires a second scanned image output from the reading units 310a, 310b without passing paper in a state in which the opposing roller 313 is positioned at the second distance Lb (La<Lb). Then, the CPU 114 determines whether an image defect factor exists in the contact glass 315 or the opposing roller 313 on the basis of the second scanned image.SELECTED DRAWING: Figure 6 【課題】読取画像の異常を高精度に判定する。【解決手段】ＣＰＵ１１４は、コンタクトガラス３１５に対して対向ローラ３１３を第１の距離Ｌａに位置させた状態で、通紙せずに読取部３１０ａ、３１０ｂから出力された第１読取画像を取得する。第１読取画像に異常があると、ＣＰＵ１１４は、ごみがあると判定し、対向ローラ３１３を第２の距離Ｌｂ（Ｌａ＜Ｌｂ）に位置させた状態で、通紙せずに読取部３１０ａ、３１０ｂから出力された第２読取画像を取得する。そしてＣＰＵ１１４は、第２読取画像に基づいて、画像瑕疵要因が、コンタクトガラス３１５または対向ローラ３１３のいずれに存在するかを判定する。【選択図】図６
Bibliography:Application Number: JP20200066188