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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：US11678067B1
公开(公告)日：2023-06-13
申请号：US17674564
申请日：2022-02-17
发明人： Yiyi Ren , Wenshou Chen , Guansong Liu
摘要： An image sensor processor implemented method for retaining pixel intensity, comprising: receiving, by the image processor, a numerical value indicative of a corresponding pixel intensity; determining, by the image processor, whether a least significant portion of the received numerical value is equal to a predetermined numerical value; and responsive to determining the least significant portion of the received numerical value is equal to the predetermined numerical value, rounding, by the image processor, the received numerical value of the corresponding pixel intensity to a higher or lower value depending on a bit sequence, and if the least significant portion of the received numerical value is not equal to the predetermined value, rounding the received numerical value to the higher or lower value based on the received numerical value; and binning the rounded value.
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公开(公告)号：US20220247992A1
公开(公告)日：2022-08-04
申请号：US17164679
申请日：2021-02-01
发明人： Wenshou Chen , Yiyi Ren , Guansong Liu , Badri Padmanabhan , Alireza Bonakdar , Richard Mann
IPC分类号： H04N13/218 , H04N5/225 , G06T7/593
摘要： In some embodiments, an image sensor is provided. The image sensor comprises a plurality of photodiodes arranged as a photodiode array. The photodiodes of the photodiode array are arranged into a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant. A first polarization filter and a first telecentric lens are aligned with the first quadrant. A second polarization filter and a second telecentric lens are aligned with the second quadrant. A third polarization filter and a third telecentric lens are aligned with the third quadrant. A fourth telecentric lens is aligned with the fourth quadrant.
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公开(公告)号：US20210200992A1
公开(公告)日：2021-07-01
申请号：US16729001
申请日：2019-12-27
摘要： A system comprising a polarization CMOS image sensor, at least one processor and a non-transitory computer-readable medium having computer-executable instructions stored thereon that, in response to execution by the at least one processor, cause the system to perform actions including receiving, from the polarization CMOS image sensor, polarization information and two-dimensional image information. The polarization information is processed using a machine learning model to generate an output that indicates whether the polarization information represents a valid biometric measurement of a physical feature of a subject.
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公开(公告)号：US11758109B2
公开(公告)日：2023-09-12
申请号：US17164679
申请日：2021-02-01
发明人： Wenshou Chen , Yiyi Ren , Guansong Liu , Badri Padmanabhan , Alireza Bonakdar , Richard Mann
IPC分类号： H04N13/218 , G06T7/593 , H04N23/55 , H04N13/00
CPC分类号： H04N13/218 , G06T7/593 , H04N23/55 , G06T2207/10012 , H04N2013/0081
摘要： In some embodiments, an image sensor is provided. The image sensor comprises a plurality of photodiodes arranged as a photodiode array. The photodiodes of the photodiode array are arranged into a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant. A first polarization filter and a first telecentric lens are aligned with the first quadrant. A second polarization filter and a second telecentric lens are aligned with the second quadrant. A third polarization filter and a third telecentric lens are aligned with the third quadrant. A fourth telecentric lens is aligned with the fourth quadrant.
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公开(公告)号：US11233963B2
公开(公告)日：2022-01-25
申请号：US16729088
申请日：2019-12-27
发明人： Wenshou Chen , Guansong Liu , Yiyi Ren , Chin Poh Pang , Badrinath Padmanabhan , Alireza Bonakdar
IPC分类号： H04N5/3745 , H01L27/146 , H04N5/378 , H04N5/232
摘要： In some embodiments, an image sensor is provided. The image sensor comprises a plurality of photodiodes arranged as a photodiode array. The plurality of photodiodes includes a first set of photodiodes configured as phase detection photodiodes, and a second set of photodiodes configured as polarization detection photodiodes. In some embodiments, a controller is provided. The controller comprises circuitry configured to process signals from a first set of photodiodes of a photodiode array to obtain depth information; process signals from a second set of photodiodes of the photodiode array to obtain polarization information; process the polarization information to obtain an ambiguous set of surface normals; and process the ambiguous set of surface normals using the depth information to obtain a three-dimensional shape image.
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公开(公告)号：US11232284B2
公开(公告)日：2022-01-25
申请号：US16729001
申请日：2019-12-27
摘要： A system comprising a polarization CMOS image sensor, at least one processor and a non-transitory computer-readable medium having computer-executable instructions stored thereon that, in response to execution by the at least one processor, cause the system to perform actions including receiving, from the polarization CMOS image sensor, polarization information and two-dimensional image information. The polarization information is processed using a machine learning model to generate an output that indicates whether the polarization information represents a valid biometric measurement of a physical feature of a subject.
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公开(公告)号：US20210203872A1
公开(公告)日：2021-07-01
申请号：US16729088
申请日：2019-12-27
发明人： Wenshou Chen , Guansong Liu , Yiyi Ren , Chin Poh Pang , Badrinath Padmanabhan , Alireza Bonakdar
IPC分类号： H04N5/3745 , H01L27/146 , H04N5/232 , H04N5/378
摘要： In some embodiments, an image sensor is provided. The image sensor comprises a plurality of photodiodes arranged as a photodiode array. The plurality of photodiodes includes a first set of photodiodes configured as phase detection photodiodes, and a second set of photodiodes configured as polarization detection photodiodes. In some embodiments, a controller is provided. The controller comprises circuitry configured to process signals from a first set of photodiodes of a photodiode array to obtain depth information; process signals from a second set of photodiodes of the photodiode array to obtain polarization information; process the polarization information to obtain an ambiguous set of surface normals; and process the ambiguous set of surface normals using the depth information to obtain a three-dimensional shape image.
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