IMAGE READING APPARATUS

PROBLEM TO BE SOLVED: To achieve an image reading apparatus capable of outputting a clear image.SOLUTION: An image reading apparatus comprises: a lens array part that convergences a reflection light obtained by reflecting a light from a lighting device with a reading object or by a transmitted beam...

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Bibliographic Details
Main Authors TOYODA YOSHITAKA, SHIRAKI TORU, OHAMA DAISUKE, MATSUZAWA TAKU
Format Patent
LanguageEnglish
Japanese
Published 07.09.2017
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Summary:PROBLEM TO BE SOLVED: To achieve an image reading apparatus capable of outputting a clear image.SOLUTION: An image reading apparatus comprises: a lens array part that convergences a reflection light obtained by reflecting a light from a lighting device with a reading object or by a transmitted beam obtained by transmitting the light from the lighting device through the reading object; a license part in which a plurality of pixels executing a photo-electric conversion of the reflection light converged by the lens array part is formed along a main scanning direction on one surface of a substrate, and which includes three-color or more different spectral responsivity; a resolution estimation part that estimates a resolution for each color obtained by spectrally diffusing an output image photo-electric converted into three-color or more by the line sensor part; a distance estimation part that estimates an estimation distance up to the reading object on the basis of a difference of elevation of the resolution of each color estimated by the resolution estimation part; and a resolution correction part that corrects the resolution of each color for the estimation distance estimated by the distance estimation part by using a resolution correction function.SELECTED DRAWING: Figure 8 【課題】 明瞭な画像を出力する画像読取装置を得る。【解決手段】 照明からの光が読取対象物で反射した反射光を収束または前記照明からの光が前記読取対象物を透過した透過光を収束する、レンズアレイ部と、基板の一方の面に、レンズアレイ部で収束した反射光を光電変換する複数の画素が、主走査方向に沿って形成された、3色以上の異なった分光感度を持つラインセンサ部と、ラインセンサ部で光電変換された出力画像の3色以上に分光されたそれぞれの色に対する解像度を推定する解像度推定部と、解像度推定部で推定されたそれぞれの色の解像度の高低差に基づき読取対象物までの推定距離を推定する距離推定部と、距離推定部で推測された推定距離に対する、それぞれの色の解像度を、解像度補正関数を用いて補正する解像度補正部と、を備えた。【選択図】 図8
Bibliography:Application Number: JP20170034622