READING DEVICE
To provide a reading device capable of obtaining correction data which is minimally affected by dust and dirt adhering to a reference density plate while shortening a time required to create correction data.SOLUTION: When a CIS unit 12 is located at a first position, the light amount of a light sour...
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Main Authors | , , , , |
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Format | Patent |
Language | English Japanese |
Published |
13.08.2020
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a reading device capable of obtaining correction data which is minimally affected by dust and dirt adhering to a reference density plate while shortening a time required to create correction data.SOLUTION: When a CIS unit 12 is located at a first position, the light amount of a light source 21 is adjusted and a reference density plate 31 is read with the adjusted light amount, and correction data A for shading correction is created. After that, the movement of the CIS unit 12 from the first position to a reading standby position is started, and while the CIS unit 12 moves from a second position to a third position, reading of the reference density plate 31 by the CIS unit 12 is performed n times. Then, in a correction data verification process, verification data Bi obtained by reading n times and the correction data A are compared, and the validity of the correction data A is verified.SELECTED DRAWING: Figure 5
【課題】補正データの作成に必要な時間を短くしつつ、基準濃度板に付着したごみや汚れの影響が極力小さい補正データを得ることができる、読取装置を提供する。【解決手段】CISユニット12が第一位置に位置する状態において、光源21の光量調整およびその調整後の光量での基準濃度板31の読み取りが実施されて、シェーディング補正のための補正データAが作成される。その後、CISユニット12の第一位置から読取待機位置への移動が開始され、その途中、CISユニット12が第二位置から第三位置まで移動する間に、CISユニット12による基準濃度板31の読み取りがn回実施される。そして、補正データ検証処理では、n回の読み取りにより得られる検証用データBiと補正データAとが比較されて、補正データAの有効性が検証される。【選択図】図5 |
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Bibliography: | Application Number: JP20190016374 |