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公开(公告)号：US20200344431A1
公开(公告)日：2020-10-29
申请号：US16854108
申请日：2020-04-21
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse , Yusuke Yamashita
Abstract: An imaging apparatus having a wide dynamic range and a stable black level without decreasing frame rate comprises a pixel unit including pixels, a read out unit for reading out the noise signal from each pixel and to amplify the noise signal by a first gain to generate a first noise signal, reads out the pixel signal and amplifies the pixel signal by the first gain and a second gain to generate a first and a second pixel signal, a first memory unit for storing a second noise signal generated by amplifying, by the second gain, the noise signal read out from a pixel of a predetermined row, and a subtraction unit for subtracting the first noise signal from the first pixel signal and to subtract the second noise signal stored in the first memory unit from the second pixel signal, while sequentially reading out signals from each pixel.
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公开(公告)号：US20200336681A1
公开(公告)日：2020-10-22
申请号：US16844365
申请日：2020-04-09
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse , Kentaro Tsukida , Takanori Yamashita , Daisuke Kobayashi , Kazuho Tsukui
Abstract: In order to provide an imaging device that includes an amplifier performing amplification with a plurality of gains for each signal from a pixel unit and can further reduce a noise component, an imaging device included in an imaging apparatus has the pixel unit in which unit pixels are arranged in a matrix and generates a signal voltage by photoelectric conversion. A column amplifier can amplify a photoelectrically converted signal with a plurality of gains. After an amplified signal is subjected to analog/digital conversion by a column ADC, a signal processing circuit subtracts a noise signal from a pixel signal. A noise signal read out after resetting a floating diffusion section included in the pixel unit and a pixel signal read out immediately thereafter are acquired by being multiplied by a first gain, and a pixel signal read out thereafter is acquired by being multiplied by a second gain. The first gain is set to a value larger than the second gain.
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公开(公告)号：US20170272629A1
公开(公告)日：2017-09-21
申请号：US15457496
申请日：2017-03-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
CPC classification number: H04N5/2256 , G06T7/0004 , G06T7/90 , G06T2207/10016 , G06T2207/30168 , H04N5/23248 , H04N5/2351 , H04N5/2357
Abstract: A flash band determination device capable of always detecting a flash band with high accuracy, and correcting the detected flash band. It is determined whether or not there is a high-luminance area in an image, which is an area having a luminance level exceeding a predetermined luminance level. When determining whether or not a flash band which is an area having a luminance level higher than a predetermined threshold level is present in a difference image which is a difference between two images which are continuously obtained, if it is determined that the high-luminance area is present, whether or not the flash band is present is determined, by excluding an area corresponding to the high-luminance area, as a determination excluded area, from the difference image.
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公开(公告)号：US20170257591A1
公开(公告)日：2017-09-07
申请号：US15445273
申请日：2017-02-28
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
CPC classification number: H04N5/378 , H04N5/3454 , H04N5/3655 , H04N9/045
Abstract: A signal processing apparatus comprising: an analog-digital converter that converts an analog signal output from a pixel section of an image sensor to a digital signal using a plurality of reference signals having different slopes from each other; and a determination unit that determines a signal level at which the plurality of reference signals are changed based on a distribution of the converted digital signal, wherein the analog-digital converter performs the conversion using a reference signal having a steeper slope when the analog signal is equal to or greater than the signal level than when the analog signal is smaller than the signal level.
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公开(公告)号：US20140362277A1
公开(公告)日：2014-12-11
申请号：US14293629
申请日：2014-06-02
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
IPC: H04N5/232
CPC classification number: H04N5/23212 , H04N5/3696 , H04N5/3698 , H04N9/04511
Abstract: An imaging apparatus includes an imaging element having pixel portions each having a plurality of photoelectric conversion units for each microlens. The imaging element can output a pixel signal depending on a pupil-divided light flux. An image processing LSI processes a video signal based on the pixel signal output from the imaging element. An imaging element control unit controls the operation of the imaging element. An exposure control unit performs exposure control for an optical lens unit and an imaging element. In the first mode, the operation for reading pixel signals from all of the plurality of photoelectric conversion units constituting the pixel portion of the imaging element is performed. In the second mode, the control for reading pixel signals from a part of the plurality of photoelectric conversion units and for stopping a circuit relating to the unused photoelectric conversion units by reading no pixel signal is performed.
Abstract translation: 一种成像装置包括具有每个具有多个用于每个微透镜的光电转换单元的像素部分的成像元件。 成像元件可以根据瞳孔分割的光通量输出像素信号。 图像处理LSI基于从成像元件输出的像素信号来处理视频信号。 成像元件控制单元控制成像元件的操作。 曝光控制单元对光学透镜单元和成像元件执行曝光控制。 在第一模式中，执行用于从构成成像元件的像素部分的所有多个光电转换单元读取像素信号的操作。 在第二模式中，执行用于从多个光电转换单元的一部分读取像素信号并且通过读取无像素信号来停止与未使用的光电转换单元有关的电路的控制。
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Patent Agency Ranking
公开(公告)号：US11025849B2
公开(公告)日：2021-06-01
申请号：US16820430
申请日：2020-03-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kentaro Tsukida , Takenori Kobuse , Shintaro Takenaka , Daisuke Kobayashi
IPC: H04N5/235 , H04N5/3745 , H04N5/378
Abstract: In a photoelectric conversion apparatus, an amplification unit outputs a first amplified signal generated by amplifying a first signal using a first gain, a second amplified signal generated by amplifying the first signal using a second gain, a third amplified signal generated by amplifying a second signal using a third gain, and a fourth amplified signal generated by amplifying the second signal using a fourth gain to an analog to digital (AD) conversion unit in this order. The AD conversion unit generates first to fourth digital signals corresponding to the first to fourth amplified signals, respectively, and outputs the second digital signal and the third digital signal to an output unit prior to the first digital signal and the fourth digital signal.
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公开(公告)号：US10313617B2
公开(公告)日：2019-06-04
申请号：US15052109
申请日：2016-02-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
IPC: H04N5/359 , H04N5/3745 , H04N5/378
Abstract: An image capturing apparatus including a pixel portion in which pixels that convert entered light into electric signals are arranged in a matrix, a column output line provided for each pixel column of the pixel portion, a clip portion configured to clip, at a predetermined signal level, signals respectively output from the pixels to the column output lines, an A/D conversion portion configured to A/D convert the signals clipped by the clip portion, and a control unit configured to change a signal level at which clipping is performed by the clip portion according to a maximum value of a conversion range of the A/D conversion portion.
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公开(公告)号：US10187559B2
公开(公告)日：2019-01-22
申请号：US15457535
申请日：2017-03-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
Abstract: A flash band determination device that is capable of always detecting a flash band with high accuracy. It is determined whether or not there is a flash band caused by an external flash of light, which is an area having a luminance level higher than a threshold level, in a plurality of images which are continuously obtained. The threshold level is changed with respect to an image picked up with an exposure condition which is different from an exposure condition used in picking up a preceding image.
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公开(公告)号：US20170366721A1
公开(公告)日：2017-12-21
申请号：US15615993
申请日：2017-06-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
CPC classification number: H04N5/235 , G03B7/091 , G03B7/16 , G03B9/40 , G03B15/05 , G03B31/00 , G06T1/0007 , H04N5/2351 , H04N5/347 , H04N5/3532 , H04N5/3572
Abstract: An image pickup apparatus which satisfactorily compensates for a flash band appearing due to an external flash and prevents a row insensitive to the flash from appearing in a corrected image. The flash band appearing in a plurality of frames consecutive in terms of time is detected based on an image signal output from an image pickup device which sequentially starts exposure and sequentially reads out signals for each row of pixels. An image in at least one of those frames is corrected to a full-screen flash image. When a width of the flash band is smaller than the number of rows in one frame, a row in which the flash band does not appear is interpolated using a row in which the flash band appears and which immediately precedes or immediately succeeds the row in which the flash band does not appear.
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10.发明申请公开(公告)号：US20160261810A1
公开(公告)日：2016-09-08
申请号：US15052109
申请日：2016-02-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse
IPC: H04N5/359 , H04N5/3745
CPC classification number: H04N5/3595 , H04N5/3745 , H04N5/37455 , H04N5/37457 , H04N5/378
Abstract: An image capturing apparatus including a pixel portion in which pixels that convert entered light into electric signals are arranged in a matrix, a column output line provided for each pixel column of the pixel portion, a clip portion configured to clip, at a predetermined signal level, signals respectively output from the pixels to the column output lines, an A/D conversion portion configured to A/D convert the signals clipped by the clip portion, and a control unit configured to change a signal level at which clipping is performed by the clip portion according to a maximum value of a conversion range of the A/D conversion portion.
Abstract translation: 一种图像捕获装置，包括像素部分，其中将输入的光转换为电信号的像素被排列成矩阵，为像素部分的每个像素列提供的列输出线，被配置为以预定的信号电平 分别从像素输出到列输出线的信号，被配置为A / D转换由剪辑部分剪辑的信号的A / D转换部分，以及控制单元，被配置为改变由剪辑执行的信号电平 根据A / D转换部分的转换范围的最大值来产生剪辑部分。
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