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公开(公告)号：US20230224603A1
公开(公告)日：2023-07-13
申请号：US17869552
申请日：2022-07-20
发明人： Boyd Fowler , Andreas Suess
IPC分类号： H04N5/365 , H04N5/3745 , G06F17/12
CPC分类号： H04N5/3651 , H04N5/37455 , G06F17/12
摘要： A method for estimating a signal charge collected by a pixel of an image sensor includes determining an average bias that depends on the pixel's floating-diffusion dark current and pixel-sampling period. The method also includes determining a signal-charge estimate as the average bias subtracted from a difference between a weighted sum of a plurality of N multiple-sampling values each multiplied by a respective one of a plurality of N sample-weights.
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公开(公告)号：US20230087541A1
公开(公告)日：2023-03-23
申请号：US17478237
申请日：2021-09-17
发明人： Wenshou Chen , Guansong Liu , Boyd Fowler , Ramakrishna Kakarala , Yiyi Ren
摘要： A method and apparatus for embedding a digital watermark in image content that is not visible to the human eye is performed on single-sensor digital camera images (often called ‘raw’ images) from a pixel-array. The raw image is transformed to generate preprocessed image coefficients, a watermark message is encrypted using a first key; the encrypted watermark message is randomized using a second key to form a watermark; and the watermark is embedded in randomly selected preprocessed image coefficients.
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公开(公告)号：US11647175B2
公开(公告)日：2023-05-09
申请号：US17113011
申请日：2020-12-05
IPC分类号： H04N13/218 , G06T7/593 , H04N13/257 , G06T7/571 , H04N23/67
CPC分类号： H04N13/218 , G06T7/571 , G06T7/593 , H04N13/257 , H04N23/672
摘要： An optical system comprises an imaging lens for imaging an object to an image and a sensing pixel array for detecting lights from the object toward the image. The sensing pixel array comprises a first sensing pixel and a second sensing pixel, each sensing pixel comprising a microlens covering a one-dimensional series of photodiodes having n photodiodes. A photodiode at an end of the one-dimensional series of photodiodes of the first sensing pixel detects a first light from the object toward the image, and a photodiode at an opposite end of the one-dimensional series of photodiodes of the second sensing pixel detects a second light from the object toward the image, where the first light and the second light pass opposite parts of the imaging lens.
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公开(公告)号：US11871129B2
公开(公告)日：2024-01-09
申请号：US17869552
申请日：2022-07-20
发明人： Boyd Fowler , Andreas Suess
IPC分类号： H04N25/67 , H04N25/671 , G06F17/12 , H04N25/772
CPC分类号： H04N25/671 , G06F17/12 , H04N25/772
摘要： A method for estimating a signal charge collected by a pixel of an image sensor includes determining an average bias that depends on the pixel's floating-diffusion dark current and pixel-sampling period. The method also includes determining a signal-charge estimate as the average bias subtracted from a difference between a weighted sum of a plurality of N multiple-sampling values each multiplied by a respective one of a plurality of N sample-weights.
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公开(公告)号：US11683598B1
公开(公告)日：2023-06-20
申请号：US17679633
申请日：2022-02-24
发明人： Bo Mu , Boyd Fowler
IPC分类号： H04N23/951 , H04N5/222 , H04N23/63 , H04N23/67
CPC分类号： H04N23/951 , H04N5/2226 , H04N23/634 , H04N23/67
摘要： An imaging system including an image sensor coupled to a controller to image an external scene is described. The controller includes logic storing instructions that when executed causes the imaging system to perform operations including capturing images, including a first image and a second image, of an external scene, and generating reduced representations of the images including a first reduced representation associated with the first image and a second reduced representation associated with the second image. The operations further include comparing the first reduced representation with the second reduced representation to determine a difference between the first image and the second image and identifying an occurrence of an occlusion affecting the image sensor imaging the external scene when the difference is greater than a threshold value.
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公开(公告)号：US11539875B1
公开(公告)日：2022-12-27
申请号：US17459181
申请日：2021-08-27
发明人： Boyd Fowler
摘要： An autofocusing method includes capturing an image of a scene with a camera that includes a pixel array; computing a horizontal-difference image, and a vertical-difference image; and combining the horizontal-difference image and the vertical-difference image to yield a combined image. The method also includes determining, from the combined image and the intensity image, an image distance with respect to a lens of the camera at which the camera forms an in-focus image. The pixel array includes horizontally-adjacent pixel pairs and vertically-adjacent pixel pairs each located beneath a respective microlens. The horizontal-difference image includes, for each horizontally-adjacent pixel pair, a derived pixel value that is an increasing function of a difference between pixel values generated by the horizontally-adjacent pixel pair. The vertical-difference image includes, for each vertically-adjacent pixel pair, a derived pixel value that is an increasing function of a difference between pixel values generated by the vertically-adjacent pixel pair.
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公开(公告)号：US11211421B2
公开(公告)日：2021-12-28
申请号：US16255194
申请日：2019-01-23
发明人： Xianmin Yi , Jingming Yao , Philip Cizdziel , Eric Webster , Duli Mao , Zhiqiang Lin , Jens Landgraf , Keiji Mabuchi , Kevin Johnson , Sohei Manabe , Dyson H. Tai , Lindsay Grant , Boyd Fowler
IPC分类号： G01S17/89 , H01L27/146 , H01L31/107 , H01L31/02 , H01L27/148 , G01S17/10
摘要： A sensor includes a photodiode disposed in a semiconductor material to receive light and convert the light into charge, and a first floating diffusion coupled to the photodiode to receive the charge. A second floating diffusion is coupled to the photodiode to receive the charge, and a first transfer transistor is coupled to transfer the charge from the photodiode into the first floating diffusion. A second transfer transistor is coupled to transfer the charge from the photodiode into the second floating diffusion, and an inductor is coupled between a first gate terminal of the first transfer transistor and a second gate terminal of the second transfer transistor. The inductor, the first gate terminal, and the second gate terminal form a resonant circuit.
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公开(公告)号：US20200235158A1
公开(公告)日：2020-07-23
申请号：US16255194
申请日：2019-01-23
发明人： Xianmin Yi , Jingming Yao , Philip Cizdziel , Eric Webster , Duli Mao , Zhiqiang Lin , Jens Landgraf , Keiji Mabuchi , Kevin Johnson , Sohei Manabe , Dyson H. Tai , Lindsay Grant , Boyd Fowler
IPC分类号： H01L27/146 , H01L31/107 , H01L31/02 , H01L27/148 , G01S17/10
摘要： A sensor includes a photodiode disposed in a semiconductor material to receive light and convert the light into charge, and a first floating diffusion coupled to the photodiode to receive the charge. A second floating diffusion is coupled to the photodiode to receive the charge, and a first transfer transistor is coupled to transfer the charge from the photodiode into the first floating diffusion. A second transfer transistor is coupled to transfer the charge from the photodiode into the second floating diffusion, and an inductor is coupled between a first gate terminal of the first transfer transistor and a second gate terminal of the second transfer transistor. The inductor, the first gate terminal, and the second gate terminal form a resonant circuit.
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公开(公告)号：US11871132B2
公开(公告)日：2024-01-09
申请号：US16870687
申请日：2020-05-08
IPC分类号： H04N25/705 , H01L27/146 , H04N25/75 , H04N25/778
CPC分类号： H04N25/705 , H01L27/14609 , H01L27/14643 , H04N25/75 , H04N25/778
摘要： In some embodiments, an imaging system is provided. The imaging system comprises an image sensor, a light source, control circuitry, and function logic. The image sensor comprises a pixel array that includes a plurality of polarization pixel cells and a plurality of time-of-flight pixel cells. The light source is configured to emit light pulses to an object. The control circuitry is coupled to the light source and the pixel array, and is configured to synchronize a timing of the emission of the light pulses with sensing of photons reflected from the object by the plurality of time-of-flight pixel cells to generate depth information. The function logic is configured to determine a set of ambiguous surface normals using signals generated by the plurality of polarization pixel cells, and to disambiguate the set of ambiguous surface normals using the depth information to generate a three-dimensional shape image.
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公开(公告)号：US20210352234A1
公开(公告)日：2021-11-11
申请号：US16870687
申请日：2020-05-08
IPC分类号： H04N5/369 , H04N5/378 , H04N5/3745 , H01L27/146
摘要： In some embodiments, an imaging system is provided. The imaging system comprises an image sensor, a light source, control circuitry, and function logic. The image sensor comprises a pixel array that includes a plurality of polarization pixel cells and a plurality of time-of-flight pixel cells. The light source is configured to emit light pulses to an object. The control circuitry is coupled to the light source and the pixel array, and is configured to synchronize a timing of the emission of the light pulses with sensing of photons reflected from the object by the plurality of time-of-flight pixel cells to generate depth information. The function logic is configured to determine a set of ambiguous surface normals using signals generated by the plurality of polarization pixel cells, and to disambiguate the set of ambiguous surface normals using the depth information to generate a three-dimensional shape image.
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