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公开(公告)号：US20180276804A1
公开(公告)日：2018-09-27
申请号：US15988605
申请日：2018-05-24
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi
CPC classification number: G06T5/40 , G06T5/009 , G06T2207/20072 , G06T2207/20208 , H04N5/2355
Abstract: A method of enhancing an image includes constructing an input histogram corresponding to an input image received at a focal plane array, the input histogram representing a pixel intensity distribution corresponding to the input image and performing an analytical operation on the input histogram to produce a modified cumulative distribution, wherein the analytical operation is a function of camera temperature. The input image is transformed using the modified cumulative distribution to produce an enhanced output image corresponding to the input image, wherein at least a portion of the input image is enhanced in the output image. In addition to or in lieu of the non-linear operation, the binning edges of the input histogram can be adjusted based on at least one of camera temperature and sensitivity state to construct an adjusted cumulative distribution.
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公开(公告)号：US20180259296A1
公开(公告)日：2018-09-13
申请号：US15457464
申请日：2017-03-13
Applicant: Sensors Unlimited, Inc.
Inventor： Joshua Lund , Jonathan Nazemi , John Liobe
CPC classification number: F41G1/36 , F41G3/165 , G01J1/0219 , G01J1/4228 , G01J5/025 , G01J5/0896 , G01J5/10 , G01J2005/0077 , G01J2005/106 , G01S17/026 , G01S17/89
Abstract: A method of threat detection includes illuminating a scene with short-wavelength infrared (SWIR) illumination and receiving a return of the SWIR illumination reflected back from the scene. The method includes analyzing the return of the SWIR illumination to detect presence of man-made optics in the scene. Illuminating, receiving, and analyzing can be performed by a device, e.g., a rifle-mounted laser device.
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公开(公告)号：US10274600B2
公开(公告)日：2019-04-30
申请号：US14938346
申请日：2015-11-11
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi , Robert Rozploch
IPC: G01J1/44 , G01S17/66 , F41G3/14 , F41G7/22 , G01J1/02 , G01J1/04 , G01S17/00 , G01S7/484 , G01S7/486 , F41G3/16 , G01J1/42
Abstract: A laser designator pulse detector includes an InGaAs photodetector configured to convert laser signals into electrical signals. A Read Out Integrated Circuit (ROIC) is operatively connected to the InGaAs photodetector to condition electrical signals from the InGaAs photodetector. The ROIC can be operatively connected to a peripheral device including one or more modules configured to process signals from the ROIC and provide pulse detection, decoding, and tracking. In another aspect, a laser designator pulse detector includes a two-dimensional array of photodetectors configured to convert laser signals into electrical signals. A ROTC as described above is operatively connected to the two-dimensional array of photodetectors.
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公开(公告)号：US09936106B2
公开(公告)日：2018-04-03
申请号：US14939449
申请日：2015-11-12
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi
CPC classification number: H04N5/2176 , H04N5/33 , H04N5/3651
Abstract: A method of correcting pixel non-uniformity for varying temperature includes determining an FPA temperature and calculating a non-uniformity correction map on a pixel by pixel basis for the FPA, wherein the non-uniformity correction for each pixel is a function of the FPA temperature and empirically derived coefficients. The method also includes applying the non-uniformity correction map at the FPA temperature to condition output of the FPA to produce temperature dependent non-uniformity corrected image data. An imaging system includes a focal plane array (FPA). A temperature sensor is operatively connected to measure FPA temperature. A module is operatively connected to the FPA and temperature sensor to calculate and apply a non-uniformity correction map as described above. There need be no temperature control device for the FPA. The FPA can include a buffered current mirror pixel architecture, and can include an InGaAs material for infrared imaging.
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公开(公告)号：US20170142297A1
公开(公告)日：2017-05-18
申请号：US14939449
申请日：2015-11-12
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi
CPC classification number: H04N5/2176 , H04N5/33 , H04N5/3651
Abstract: A method of correcting pixel non-uniformity for varying temperature includes determining an FPA temperature and calculating a non-uniformity correction map on a pixel by pixel basis for the FPA, wherein the non-uniformity correction for each pixel is a function of the FPA temperature and empirically derived coefficients. The method also includes applying the non-uniformity correction map at the FPA temperature to condition output of the FPA to produce temperature dependent non-uniformity corrected image data. An imaging system includes a focal plane array (FPA). A temperature sensor is operatively connected to measure FPA temperature. A module is operatively connected to the FPA and temperature sensor to calculate and apply a non-uniformity correction map as described above. There need be no temperature control device for the FPA. The FPA can include a buffered current mirror pixel architecture, and can include an InGaAs material for infrared imaging.
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Patent Agency Ranking
公开(公告)号：US20170138788A1
公开(公告)日：2017-05-18
申请号：US14939420
申请日：2015-11-12
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi
CPC classification number: G01J1/44 , G01J1/4228 , G01J5/16 , G01J5/20 , G01J2001/444 , G01J2005/0048 , G01J2005/106
Abstract: A method of normalizing FPA system gain for varying temperature includes determining an FPA temperature and calculating an FPA system gain as a function of the FPA temperature, system gain for the FPA at a reference temperature, and empirically derived coefficients. The method also includes applying the FPA system gain at the FPA temperature to condition output of the FPA to produce temperature independent image data. An imaging system includes a focal plane array (FPA). A temperature sensor is operatively connected to measure temperature of the FPA. A module is operatively connected to the FPA and temperature sensor to calculate FPA system gain for the FPA as described above, and to apply the FPA system gain to condition output of the FPA to produce temperature independent image data. There need be no temperature control device, such as a thermoelectric cooling device, connected for temperature control of the FPA.
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公开(公告)号：US20160282178A1
公开(公告)日：2016-09-29
申请号：US14938346
申请日：2015-11-11
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi , Robert Rozploch
CPC classification number: G01S17/66 , F41G3/145 , F41G3/165 , F41G7/226 , F41G7/2293 , G01J1/0295 , G01J1/0488 , G01J1/44 , G01J2001/4238 , G01S7/484 , G01S7/4861 , G01S17/003
Abstract: A laser designator pulse detector includes an InGaAs photodetector configured to convert laser signals into electrical signals. A Read Out Integrated Circuit (ROIC) is operatively connected to the InGaAs photodetector to condition electrical signals from the InGaAs photodetector. The ROIC can be operatively connected to a peripheral device including one or more modules configured to process signals from the ROIC and provide pulse detection, decoding, and tracking. In another aspect, a laser designator pulse detector includes a two-dimensional array of photodetectors configured to convert laser signals into electrical signals. A ROTC as described above is operatively connected to the two-dimensional array of photodetectors.
Abstract translation: 激光指示器脉冲检测器包括配置成将激光信号转换成电信号的InGaAs光电探测器。 读出集成电路（ROIC）可操作地连接到InGaAs光电检测器以调节来自InGaAs光电探测器的电信号。 ROIC可以可操作地连接到外围设备，包括配置成处理来自ROIC的信号的一个或多个模块，并提供脉冲检测，解码和跟踪。 在另一方面，激光指示器脉冲检测器包括被配置为将激光信号转换为电信号的二维阵列的光电检测器。 如上所述的ROTC可操作地连接到光电检测器的二维阵列。
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公开(公告)号：US10175030B2
公开(公告)日：2019-01-08
申请号：US15457464
申请日：2017-03-13
Applicant: Sensors Unlimited, Inc.
Inventor： Joshua Lund , Jonathan Nazemi , John Liobe
Abstract: A method of threat detection includes illuminating a scene with short-wavelength infrared (SWIR) illumination and receiving a return of the SWIR illumination reflected back from the scene. The method includes analyzing the return of the SWIR illumination to detect presence of man-made optics in the scene. Illuminating, receiving, and analyzing can be performed by a device, e.g., a rifle-mounted laser device.
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公开(公告)号：US10018504B2
公开(公告)日：2018-07-10
申请号：US14939420
申请日：2015-11-12
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi
IPC: G01J1/44 , G01J1/42 , G01J5/00 , H05B1/02 , H04N5/33 , H04N5/374 , G01J5/16 , G01J5/20 , G01J5/10
CPC classification number: G01J1/44 , G01J1/4228 , G01J5/16 , G01J5/20 , G01J2001/444 , G01J2005/0048 , G01J2005/106
Abstract: A method of normalizing FPA system gain for varying temperature includes determining an FPA temperature and calculating an FPA system gain as a function of the FPA temperature, system gain for the FPA at a reference temperature, and empirically derived coefficients. The method also includes applying the FPA system gain at the FPA temperature to condition output of the FPA to produce temperature independent image data. An imaging system includes a focal plane array (FPA). A temperature sensor is operatively connected to measure temperature of the FPA. A module is operatively connected to the FPA and temperature sensor to calculate FPA system gain for the FPA as described above, and to apply the FPA system gain to condition output of the FPA to produce temperature independent image data. There need be no temperature control device, such as a thermoelectric cooling device, connected for temperature control of the FPA.
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公开(公告)号：US10007974B2
公开(公告)日：2018-06-26
申请号：US15178888
申请日：2016-06-10
Applicant: Sensors Unlimited, Inc.
Inventor： Jonathan Nazemi
CPC classification number: G06T5/40 , G06T5/009 , G06T2207/20072 , G06T2207/20208 , H04N5/2355
Abstract: A method of enhancing an image includes constructing an input histogram corresponding to an input image received at a focal plane array, the input histogram representing a pixel intensity distribution corresponding to the input image and performing an analytical operation on the input histogram to produce a modified cumulative distribution, wherein the analytical operation is a function of camera temperature. The input image is transformed using the modified cumulative distribution to produce an enhanced output image corresponding to the input image, wherein at least a portion of the input image is enhanced in the output image. In addition to or in lieu of the non-linear operation, the binning edges of the input histogram can be adjusted based on at least one of camera temperature and sensitivity state to construct an adjusted cumulative distribution.
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