- 专利标题: Signal correction device, image reading device, image processing apparatus, signal correction method, and computer program product
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申请号: US17035791申请日: 2020-09-29
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公开(公告)号: US11277541B2公开(公告)日: 2022-03-15
- 发明人: Tatsuya Ozaki , Hiroki Shirado
- 申请人: Tatsuya Ozaki , Hiroki Shirado
- 申请人地址: JP Kanagawa; JP Kanagawa
- 专利权人: Tatsuya Ozaki,Hiroki Shirado
- 当前专利权人: Tatsuya Ozaki,Hiroki Shirado
- 当前专利权人地址: JP Kanagawa; JP Kanagawa
- 代理机构: Xsensus LLP
- 优先权: JPJP2019-181002 20190930
- 主分类号: H04N1/40
- IPC分类号: H04N1/40 ; H04N1/409 ; H04N1/00 ; H04N1/58 ; H04N1/60
摘要:
A signal correction device includes a correction signal generator configured to generate a correction signal serving to remove noise superimposed on an input signal; a phase adjuster configured to shift a phase of the correction signal generated by the correction signal generator; a subtractor configured to generate an output signal for output by subtracting the correction signal from the input signal; a peak and bottom detector configured to detect a peak value and a bottom value of the output signal; and a determiner configured to determine a phase-shift amount of the phase adjuster from the peak value and the bottom value of the output signal detected by the peak and bottom detector. The determiner detects uncorrected noise from the peak value and the bottom value of the output signal from the subtractor, and sets the phase-shift amount such that the uncorrected noise is reduced to a minimum.