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公开(公告)号：US20230181134A1
公开(公告)日：2023-06-15
申请号：US17644201
申请日：2021-12-14
Applicant: BAE SYSTEMS IMAGING SOLUTIONS INC.
Inventor： Stanley K. Searing , Kwang Bo Cho , Hung T. Do , Stephen W. Mims , Marc K. Thacher , Bruce E. Willy , Glen L. Collier , Douglas W. Teeter , George Y. Wang
CPC classification number: A61B6/145 , G06T7/0012 , A61B6/5258 , G01T1/17 , A61B6/56 , A61B6/54 , A61B6/4233 , G06T2207/30168 , G06T2207/30036 , G06T2207/10116
Abstract: Techniques are provided for x-ray image data monitoring and signaling for patient safety. A methodology implementing the techniques according to an embodiment includes integrating energy associated with a received x-ray pulse at an array of pixels. The method also includes multiplexing a readout of the integrated energy from the array of pixels, as analog signals, into channels, and performing analog to digital conversion of the analog signals of the channels into digital signals. The method further includes generating an error indicator in response to determining that a calculated mean of the digital signals is either greater than an upper threshold value associated with saturation or less than a lower threshold value associated with underexposure. The method further includes transmitting the error indicator over a Universal Serial Bus, to an imaging system, to terminate transmission of further x-ray pulses.
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公开(公告)号：US10200644B2
公开(公告)日：2019-02-05
申请号：US15552426
申请日：2016-12-19
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Hung T. Do , Paul G. Lim , Stephen W. Mims
IPC: H04N3/14 , H04N5/335 , H04N5/3745 , H04N5/351 , H04N5/355 , H04N5/361 , H04N5/353 , H04N5/359 , H04N5/378
Abstract: An imaging array having a plurality of pixel sensors connected to a bit line is disclosed. Each pixel sensor includes a first photodetector having a photodiode, a floating diffusion node, and an amplifier. The floating diffusion node is characterized by a parasitic photodiode and parasitic capacitance. The amplifier amplifies a voltage on the floating diffusion node to produce a signal on an amplifier output. The first photodetector also includes a bit line gate that connects the amplifier output to the bit line in response to a row select signal and a voltage dividing capacitor having a first terminal connected to the floating diffusion node and a second terminal connected to a drive source that switches a voltage on the second terminal between a drive potential different from ground and ground in response to a drive control signal.
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公开(公告)号：US20240048667A1
公开(公告)日：2024-02-08
申请号：US17817146
申请日：2022-08-03
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Glen L. Collier , Stephen W. Mims , George Y. Wang , Kun Zhao , Stanley K. Searing
CPC classification number: H04N5/32 , H04N5/3696 , H04N5/378 , H04N5/351 , A61B6/145
Abstract: Techniques are provided for x-ray onset detection for an intraoral dental sensor. A methodology implementing the techniques according to an embodiment includes calculating a plurality of superpixel values for each of a plurality of rows of detector pixels of a sensor. Each of the superpixel values is based on a sum of pixel values of a set of pixels associated with the superpixel value, the set of pixels selected from the detection row of a current frame of the sensor. The method also includes calculating a difference between each of the superpixel values and a corresponding stored superpixel value generated from a previous sensor frame and determining if the differences exceed a superpixel threshold value. The method further includes incrementing a hit counter in response to the determination and generating a detection signal if the hit counter exceeds a hit count threshold, otherwise proceeding to process the next detection row.
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公开(公告)号：US20180332247A1
公开(公告)日：2018-11-15
申请号：US15552426
申请日：2016-12-19
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Hung T. Do , Paul G. Lim , Stephen W. Mims
IPC: H04N5/3745 , H04N5/378 , H04N5/359 , H04N5/353
CPC classification number: H04N5/3745 , H04N5/351 , H04N5/353 , H04N5/3559 , H04N5/359 , H04N5/361 , H04N5/37452 , H04N5/378
Abstract: An imaging array having a plurality of pixel sensors connected to a bit line is disclosed. Each pixel sensor includes a first photodetector having a photodiode, a floating diffusion node, and an amplifier. The floating diffusion node is characterized by a parasitic photodiode and parasitic capacitance. The amplifier amplifies a voltage on the floating diffusion node to produce a signal on an amplifier output. The first photodetector also includes a bit line gate that connects the amplifier output to the bit line in response to a row select signal and a voltage dividing capacitor having a first terminal connected to the floating diffusion node and a second terminal connected to a drive source that switches a voltage on the second terminal between a drive potential different from ground and ground in response to a drive control signal.
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公开(公告)号：US20180191979A1
公开(公告)日：2018-07-05
申请号：US15740585
申请日：2016-08-18
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Bo Mu , Alberto M. Magnani , Stephen W. Mims
CPC classification number: H04N5/378 , H04N5/341 , H04N5/35545 , H04N5/35563 , H04N5/361 , H04N5/365 , H04N5/3651 , H04N5/3658
Abstract: An apparatus having a rectangular imaging array characterized by a plurality of pixel sensors and a plurality of readout lines is disclosed. The apparatus has a plurality of column processing circuits, each column processing circuit being connected to a corresponding one of the readout lines and a plurality of signal injectors, one signal injector being connected to each of the readout lines. Each signal injector causes one of a predetermined number of voltages to be coupled to that readout line. An exposure for each of the pixel sensors is determined during image recording periods. The signal injectors inject a plurality of calibration voltages into the readout lines during calibration periods, and determines a gain function of an amplifier in one of the column processing circuits by measuring an output of the amplifier for the plurality of calibration voltages, the calibration period is between the imaging recording periods.
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Patent Agency Ranking
公开(公告)号：US20250054165A1
公开(公告)日：2025-02-13
申请号：US18448452
申请日：2023-08-11
Applicant: BAE SYSTEMS Imaging Solutions Inc.
Inventor： Stephen W. Mims , Paul G. Lim
Abstract: In one example, a method of image processing includes acquiring a plurality of input image frames, detecting at least one object of interest in individual image frames of the plurality of image frames, for the individual image frames, producing a respective bounding box corresponding to the at least one object of interest, the bounding box describing coordinates of a boundary of the object of interest within a respective individual image frame, temporally averaging corresponding pixel values of pixels within the bounding box over the plurality of image frames to produce a plurality of averaged pixel values, and producing an output image in which pixels within an area of the output image described by coordinates of the bounding box are replaced with the averaged pixel values.
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公开(公告)号：US20230181133A1
公开(公告)日：2023-06-15
申请号：US17550856
申请日：2021-12-14
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Stanley K. Searing , Marc K. Thacher , Kwang Bo Cho , Hung T. Do , Stephen W. Mims , Bruce E. Willy , Glen L. Collier , Douglas W. Teeter , George Y. Wang
Abstract: Techniques are provided for x-ray sensing for intraoral tomography. A methodology implementing the techniques according to an embodiment includes detecting an x-ray pulse based on energy received at one or more pixels of a pixel array. The method also includes integrating the energy received at each of the pixels of the array of pixels, in response to the detection, wherein the energy received at each of the pixels is associated with the x-ray pulse. The method further includes multiplexing readouts of analog signals from the array of pixels into two or more parallel channels. The method further includes simultaneously converting (or otherwise in parallel) the analog signals of each of the channels into digital signals and storing the digital signals in memory as frames of data. The method may further include, for example, transmitting the frames of data from the memory, over a Universal Serial Bus, to an imaging system.
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公开(公告)号：US10057530B2
公开(公告)日：2018-08-21
申请号：US15740585
申请日：2016-08-18
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Bo Mu , Alberto M. Magnani , Stephen W. Mims
CPC classification number: H04N5/378 , H01L27/14609 , H04N5/341 , H04N5/35536 , H04N5/35545 , H04N5/35563 , H04N5/361 , H04N5/365 , H04N5/3651 , H04N5/3658
Abstract: An apparatus having a rectangular imaging array characterized by a plurality of pixel sensors and a plurality of readout lines is disclosed. The apparatus has a plurality of column processing circuits, each column processing circuit being connected to a corresponding one of the readout lines and a plurality of signal injectors, one signal injector being connected to each of the readout lines. Each signal injector causes one of a predetermined number of voltages to be coupled to that readout line. An exposure for each of the pixel sensors is determined during image recording periods. The signal injectors inject a plurality of calibration voltages into the readout lines during calibration periods, and determines a gain function of an amplifier in one of the column processing circuits by measuring an output of the amplifier for the plurality of calibration voltages, the calibration period is between the imaging recording periods.
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公开(公告)号：US12126928B2
公开(公告)日：2024-10-22
申请号：US18147903
申请日：2022-12-29
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Hung T. Do , Khai Nguyen , Alexander Lu , Stephen W. Mims , Kwang Bo Cho , Angel Rogelio Lopez
IPC: H04N25/78
CPC classification number: H04N25/78
Abstract: Examples include column readout amplifiers and image sensors including same. In one example, a column readout amplifier includes a signal amplifier having an amplifier output and first and second amplifier inputs, a filter capacitor having first and second terminals, the second terminal connected to a ground terminal, a buffer amplifier having a buffer amplifier input and a buffer amplifier output, a switching network configured to switchably connect the amplifier output to the buffer amplifier input and the buffer amplifier output to the first terminal of the filter capacitor during a first time period, and to switchably connect the amplifier output directly to the first terminal of the filter capacitor during a second time period, and a low-pass filter connected in a feedback path of the signal amplifier between the amplifier output and the first amplifier input, the low-pass filter including a series resistor and a capacitor.
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公开(公告)号：US12015870B2
公开(公告)日：2024-06-18
申请号：US17817146
申请日：2022-08-03
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Glen L. Collier , Stephen W. Mims , George Y. Wang , Kun Zhao , Stanley K. Searing
IPC: H04N5/32 , A61B6/51 , H04N25/50 , H04N25/702 , H04N25/75
CPC classification number: H04N5/32 , A61B6/512 , H04N25/50 , H04N25/702 , H04N25/75
Abstract: Techniques are provided for x-ray onset detection for an intraoral dental sensor. A methodology implementing the techniques according to an embodiment includes calculating a plurality of superpixel values for each of a plurality of rows of detector pixels of a sensor. Each of the superpixel values is based on a sum of pixel values of a set of pixels associated with the superpixel value, the set of pixels selected from the detection row of a current frame of the sensor. The method also includes calculating a difference between each of the superpixel values and a corresponding stored superpixel value generated from a previous sensor frame and determining if the differences exceed a superpixel threshold value. The method further includes incrementing a hit counter in response to the determination and generating a detection signal if the hit counter exceeds a hit count threshold, otherwise proceeding to process the next detection row.
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