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    • 1. 发明授权
    • Method for reducing noise, and pulse photometer using the method
    • 降低噪声的方法,采用脉冲光度计的方法
    • US07025728B2
    • 2006-04-11
    • US10660557
    • 2003-09-12
    • Kazumasa ItoMasaru YaritaTetsuya Shibasaki
    • Kazumasa ItoMasaru YaritaTetsuya Shibasaki
    • A61B5/02A61B5/00
    • A61B5/14551
    • A living body is irradiated with a first light beam having a first wavelength and a second light beam having a second wavelength which is different from the first wavelength. The first light beam and the second light beam, which have been reflected or transmitted from the living body, are converted into a first electric signal corresponding to the first wavelength and a second electric signal corresponding to the second wavelength, as the observed pulse data. A light absorbance ratio obtained from the first electric signal and the second electric signal is computed, for each one of frequency ranges dividing an observed frequency band. It is determined that noise is not mixed into the observed pulse wave data in a case where a substantial match exists among light absorbance ratios computed for the respective frequency ranges.
    • 用具有第一波长的第一光束和与第一波长不同的第二波长的第二光束照射生物体。 作为观察到的脉冲数据,已经从活体反射或发射的第一光束和第二光束被转换成对应于第一波长的第一电信号和对应于第二波长的第二电信号。 对于分割观测频带的频率范围的每一个,计算从第一电信号和第二电信号获得的吸光度比。 在针对各个频率范围计算的光吸收率之间存在基本匹配的情况下,确定没有混入观察到的脉搏波数据中的噪声。
    • 3. 发明申请
    • IMAGE PICKUP DEVICE AND NOISE REDUCTION METHOD THEREOF
    • 图像拾取装置及其噪声减少方法
    • US20070153103A1
    • 2007-07-05
    • US11564000
    • 2006-11-28
    • Tetsuya Shibasaki
    • Tetsuya Shibasaki
    • H04N5/217
    • H04N5/3575H04N5/3595H04N5/372
    • An image pickup device having an electron multiplying-charge coupled device has: an electron multiplying magnification control unit of the electron multiplying-charge coupled device; an obtaining unit for obtaining signals which are outputted from light-shielded pixels of the electron multiplying-charge coupled device; an averaging unit for executing an inter-line averaging process to the signals obtained by the obtaining unit; a suppression unit for performing a predetermined low-level suppression and a predetermined high-level suppression to the signal averaged by the averaging unit in accordance with the electron multiplying magnification of the electron multiplying magnification control unit; a deriving unit for deriving image signals which are outputted from light-unshielded pixels of the electron multiplying-charge coupled device; and a subtraction unit for subtracting the signal suppressed by the suppression unit from the image signals derived by the deriving unit.
    • 具有电子倍增电荷耦合器件的图像拾取器件具有:电子倍增电荷耦合器件的电子倍增倍率控制单元; 获取单元,用于获得从所述电子倍增电荷耦合器件的屏蔽像素输出的信号; 平均单元,用于对由获取单元获得的信号执行线间平均处理; 抑制单元,用于根据电子倍增倍率控制单元的电子倍增倍,对由平均单元平均的信号执行预定的低电平抑制和预定的高电平抑制; 导出单元,用于导出从电子倍增电荷耦合器件的无光屏蔽像素输出的图像信号; 以及减法单元,用于从由导出单元导出的图像信号中减去由抑制单元抑制的信号。
    • 4. 发明申请
    • Image pickup device and noise reduction method thereof
    • 摄像装置及其降噪方法
    • US20080170138A1
    • 2008-07-17
    • US12007917
    • 2008-01-17
    • Tetsuya Shibasaki
    • Tetsuya Shibasaki
    • H04N5/217H04N5/335
    • H04N5/37213H04N5/3595H04N5/3722
    • An image pickup device having an electron multiplying-charge coupled device includes a control unit for controlling an electron multiplication factor of the electron multiplying-charge coupled device; an obtaining unit for obtaining signals output from predetermined pixels of the electron multiplying-charge coupled device; and an averaging unit for performing an inter-line averaging process of the signals obtained by the obtaining unit. The device further includes a suppression unit for performing low-level and high-level suppressions on the signal averaged by the averaging unit based on the electron multiplication factor of the electron multiplication factor control unit; an acquisition unit for acquiring image signals output from the pixels other than the predetermined pixels of the electron multiplying-charge coupled device; and a subtractor for subtracting the signal suppressed by the suppression unit from the image signals acquired by the acquisition unit.
    • 具有电子倍增电荷耦合器件的图像拾取器件包括用于控制电子倍增电荷耦合器件的电子倍增因子的控制单元; 获取单元,用于获得从电子倍增电荷耦合器件的预定像素输出的信号; 以及平均单元,用于对获得单元获得的信号进行线间平均处理。 该装置还包括抑制单元,用于基于电子倍增因子控制单元的电子倍增因子,对由平均单元平均的信号执行低电平和高电平抑制; 获取单元,用于获取从所述电子倍增电荷耦合器件的预定像素以外的像素输出的图像信号; 以及用于从由所述获取单元获取的图像信号中减去由所述抑制单元抑制的信号的减法器。
    • 6. 发明授权
    • Image pickup device and noise reduction method thereof
    • 摄像装置及其降噪方法
    • US08564694B2
    • 2013-10-22
    • US12922522
    • 2010-01-14
    • Tetsuya Shibasaki
    • Tetsuya Shibasaki
    • H04N5/217H04N5/335
    • H04N5/2175H04N5/3595H04N5/37213
    • There is provided an image pickup device capable of reducing noises, e.g., smears outputted from a CCD without using a special light amount adjusting device regardless of pixel defects. The image-pickup device includes a CCD having an image-pickup area and a storage area; a control unit for vertical-transferring signals of a line number having no pixel signal from a vertical-transfer register of the storage area and vertical-transferring more lines than the line number of a vertical-transfer register of the image-pickup area by the line number to the vertical-transfer register of the storage area during a period; an image signal obtaining unit for obtaining first image signals outputted from predetermined pixels of the CCD; an obtaining unit for obtaining the second image signals of the line number having no pixel signal of the storage area; and a correction unit for subtracting the second image signal from the first image signals.
    • 提供了一种能够减少噪声,例如从CCD输出的污迹,而不使用特殊的光量调节装置,而不管像素缺陷如何。 图像拾取装置包括具有图像拾取区域和存储区域的CCD; 控制单元,用于垂直传送来自存储区域的垂直传送寄存器的不具有像素信号的行号的信号,并且垂直传送比图像拾取区域的垂直传送寄存器的行号更多的行 一段时间内存储区域的垂直传送寄存器的行号; 图像信号获取单元,用于获得从CCD的预定像素输出的第一图像信号; 获取单元,用于获得没有存储区域的像素信号的行号的第二图像信号; 以及用于从第一图像信号中减去第二图像信号的校正单元。
    • 8. 发明授权
    • Image pickup device and noise reduction method thereof
    • 摄像装置及其降噪方法
    • US07990442B2
    • 2011-08-02
    • US12007917
    • 2008-01-17
    • Tetsuya Shibasaki
    • Tetsuya Shibasaki
    • H04N5/217
    • H04N5/37213H04N5/3595H04N5/3722
    • An image pickup device having an electron multiplying-charge coupled device includes a control unit for controlling an electron multiplication factor of the electron multiplying-charge coupled device; an obtaining unit for obtaining signals output from predetermined pixels of the electron multiplying-charge coupled device; and an averaging unit for performing an inter-line averaging process of the signals obtained by the obtaining unit. The device further includes a suppression unit for performing low-level and high-level suppressions on the signal averaged by the averaging unit based on the electron multiplication factor of the electron multiplication factor control unit; an acquisition unit for acquiring image signals output from the pixels other than the predetermined pixels of the electron multiplying-charge coupled device; and a subtractor for subtracting the signal suppressed by the suppression unit from the image signals acquired by the acquisition unit.
    • 具有电子倍增电荷耦合器件的图像拾取器件包括用于控制电子倍增电荷耦合器件的电子倍增因子的控制单元; 获取单元,用于获得从电子倍增电荷耦合器件的预定像素输出的信号; 以及平均单元,用于对获得单元获得的信号进行线间平均处理。 该装置还包括抑制单元,用于基于电子倍增因子控制单元的电子倍增因子,对由平均单元平均的信号执行低电平和高电平抑制; 获取单元,用于获取从所述电子倍增电荷耦合器件的预定像素以外的像素输出的图像信号; 以及用于从由所述获取单元获取的图像信号中减去由所述抑制单元抑制的信号的减法器。
    • 9. 发明申请
    • IMAGE PICKUP DEVICE AND NOISE REDUCTION METHOD THEREOF
    • 图像拾取装置及其噪声减少方法
    • US20110013068A1
    • 2011-01-20
    • US12922522
    • 2010-01-14
    • Tetsuya Shibasaki
    • Tetsuya Shibasaki
    • H04N5/335
    • H04N5/2175H04N5/3595H04N5/37213
    • There is provided an image pickup device capable of reducing noises, e.g., smears outputted from a CCD without using a special light amount adjusting device regardless of pixel defects. The image-pickup device includes a CCD having an image-pickup area and a storage area; a control unit for vertical-transferring signals of a line number having no pixel signal from a vertical-transfer register of the storage area and vertical-transferring more lines than the line number of a vertical-transfer register of the image-pickup area by the line number to the vertical-transfer register of the storage area during a period; an image signal obtaining unit for obtaining first image signals outputted from predetermined pixels of the CCD; an obtaining unit for obtaining the second image signals of the line number having no pixel signal of the storage area; and a correction unit for subtracting the second image signal from the first image signals.
    • 提供了一种能够减少噪声,例如从CCD输出的污迹,而不使用特殊的光量调节装置,而不管像素缺陷如何。 图像拾取装置包括具有图像拾取区域和存储区域的CCD; 控制单元,用于垂直传送来自存储区域的垂直传送寄存器的不具有像素信号的行号的信号,并且垂直传送比图像拾取区域的垂直传送寄存器的行号更多的行 一段时间内存储区域的垂直传送寄存器的行号; 图像信号获取单元,用于获得从CCD的预定像素输出的第一图像信号; 获取单元,用于获得没有存储区域的像素信号的行号的第二图像信号; 以及用于从第一图像信号中减去第二图像信号的校正单元。
    • 10. 发明授权
    • Image pickup device and noise reduction method thereof
    • 摄像装置及其降噪方法
    • US07701494B2
    • 2010-04-20
    • US11564000
    • 2006-11-28
    • Tetsuya Shibasaki
    • Tetsuya Shibasaki
    • H04N5/217
    • H04N5/3575H04N5/3595H04N5/372
    • An image pickup device having an electron multiplying-charge coupled device has: an electron multiplying magnification control unit of the electron multiplying-charge coupled device; an obtaining unit for obtaining signals which are outputted from light-shielded pixels of the electron multiplying-charge coupled device; an averaging unit for executing an inter-line averaging process to the signals obtained by the obtaining unit; a suppression unit for performing a predetermined low-level suppression and a predetermined high-level suppression to the signal averaged by the averaging unit in accordance with the electron multiplying magnification of the electron multiplying magnification control unit; a deriving unit for deriving image signals which are outputted from light-unshielded pixels of the electron multiplying-charge coupled device; and a subtraction unit for subtracting the signal suppressed by the suppression unit from the image signals derived by the deriving unit.
    • 具有电子倍增电荷耦合器件的图像拾取器件具有:电子倍增电荷耦合器件的电子倍增倍率控制单元; 获取单元,用于获得从所述电子倍增电荷耦合器件的屏蔽像素输出的信号; 平均单元,用于对由获取单元获得的信号执行线间平均处理; 抑制单元,用于根据电子倍增倍率控制单元的电子倍增倍,对由平均单元平均的信号执行预定的低电平抑制和预定的高电平抑制; 导出单元,用于导出从电子倍增电荷耦合器件的无光屏蔽像素输出的图像信号; 以及减法单元,用于从由导出单元导出的图像信号中减去由抑制单元抑制的信号。