- 专利标题: IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE READING METHOD
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申请号: US17695838申请日: 2022-03-16
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公开(公告)号: US20220303417A1公开(公告)日: 2022-09-22
- 发明人: Hideki HASHIMOTO , Daisuke NIKAKU , Yutaka OHMIYA
- 申请人: Hideki HASHIMOTO , Daisuke NIKAKU , Yutaka OHMIYA
- 申请人地址: JP Tokyo; JP Kanagawa; JP Tokyo
- 专利权人: Hideki HASHIMOTO,Daisuke NIKAKU,Yutaka OHMIYA
- 当前专利权人: Hideki HASHIMOTO,Daisuke NIKAKU,Yutaka OHMIYA
- 当前专利权人地址: JP Tokyo; JP Kanagawa; JP Tokyo
- 优先权: JP2021-043349 20210317
- 主分类号: H04N1/00
- IPC分类号: H04N1/00 ; H04N1/12
摘要:
An image reading device includes a reading unit, a background member, and processing circuitry. The reading unit includes alight source to emit light to a passage area through which an object passes and an imaging device to capture reflected light of the light emitted to generate a visible image and an invisible image. The background member is disposed opposite the light source across the passage area. The processing circuitry is configured to: detect a change in an image characteristic due to a change in an optical characteristic of the reading unit, in invisible images obtained by capturing of invisible marks on the background member; determine a correction amount of an image characteristic to be used for correcting an image of the object generated by the imaging device, based on the change in the image characteristic detected; and correct the image characteristic based on the correction amount determined.
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