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公开(公告)号：US11663704B2
公开(公告)日：2023-05-30
申请号：US17243405
申请日：2021-04-28
发明人： Karlton David Powell
CPC分类号： G06T5/006 , G06T3/0012 , H04N5/2628 , H04N7/15
摘要： Examples are disclosed relating to applying an analytical geometric projection that has been modified by an amplitude function. One example provides a computing device comprising a logic subsystem and a storage subsystem holding instructions executable by the logic subsystem to receive an image of a scene as acquired by an image sensor, apply a mapping to the image of the scene that maps pixels of the image to projected pixels on an analytical projection that is modified by an amplitude function such that the analytical projection achieves a higher zoom effect on pixels closer to a center of the image compared to pixels closer to an edge of the image, thereby obtaining a corrected image, and output the corrected image.
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公开(公告)号：US11508090B2
公开(公告)日：2022-11-22
申请号：US17209029
申请日：2021-03-22
摘要： Systems and methods are provided for calibrating camera and measuring offsets for reducing distortions on images. The calibrating includes aligning an on-board image sensor and a lens barrel using a kinematic mount and affixing the onboard image sensor and the lens barrel to assemble a camera. The kinematic mount provides a predetermined number of degrees of freedom in aligning the on-board image sensor and the lens barrel. A device embeds the camera. The measuring includes receiving the camera in the kinematic mount and measuring an opposing pair of offset values as measured optical centers from the lens optical axis to the image sensor pointing reference at yaw orientations of the camera at 0 degree and 180 degrees. The method determines a total offset value by taking an average of the pair and canceling the rotationally symmetrical error. The method uses the offset value for reducing distortions on images by de-warping.
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公开(公告)号：US11204152B2
公开(公告)日：2021-12-21
申请号：US16655129
申请日：2019-10-16
发明人： Karlton David Powell
摘要： An illumination device including a light source and a reflector with a pair of vertically opposed symmetrical reflective surfaces and a pair of horizontally opposed symmetrical reflective surfaces. Each of the vertically and horizontally opposed symmetrical reflective surfaces includes a concave region positioned proximate a light source, and a convex region positioned distal the light source. The pairs of vertically opposed symmetrical reflective surfaces and horizontally opposed symmetrical reflective surfaces of the reflector redistribute light emitted from the light source such that the illumination device outputs a field of illumination having a substantially uniform intensity of light.
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公开(公告)号：US10049272B2
公开(公告)日：2018-08-14
申请号：US14864622
申请日：2015-09-24
摘要： Examples are disclosed herein that relate to user authentication. One example provides a biometric identification system comprising an iris illuminator, an image sensor configured to capture light reflected from irises of a user as a result of those irises being illuminated by the iris illuminator, a drive circuit configured to drive the iris illuminator in a first mode and a second mode that each cause the irises to be illuminated differently, the first and second modes thereby yielding a first mode output at the image sensor and a second mode output at the image sensor, respectively, and a processor configured to process at least one of the first mode output and the second mode output and, in response to such processing, select one of the first mode and the second mode for use in performing an iris authentication on the user.
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公开(公告)号：US20170068027A1
公开(公告)日：2017-03-09
申请号：US14848967
申请日：2015-09-09
发明人： Karlton David Powell
CPC分类号： G02B5/281 , B29C41/20 , B29D11/00634 , G02B5/208 , G02B5/223
摘要： An infrared filter includes a substrate having a front surface and a back surface. The infrared filter includes screened ink and an optically clear medium, or dye impregnated medium. The screened ink has a front surface nearest the substrate and a back surface. The screened ink has a first index of refraction. The optically clear medium abuts at least a portion of the back surface of the screened ink. The optically clear medium has a second index of refraction that differs from the first index of refraction of the screened ink by less than a predetermined amount. The dye impregnated medium has a spectral transmission over an infrared wavelength of greater than 70% and a spectral transmission over a visible light wavelength of less than 5%, while at same time maintaining MTF performance of a vision system imaging through the filter. Methods of manufacture are also described.
摘要翻译： 红外线滤光器包括具有前表面和后表面的基板。 红外线过滤器包括筛分油墨和光学透明介质，或染料浸渍介质。 筛选的油墨具有最靠近基材的前表面和后表面。 筛选的墨水具有第一折射率。 光学透明的介质邻接被筛选的油墨的后表面的至少一部分。 光学透明介质具有与筛选的墨水的第一折射率不同的预定量的第二折射率。 染料浸渍介质具有大于70％的红外波长的光谱透射率和小于5％的可见光波长的光谱透射，同时保持通过滤光片的视觉系统成像的MTF性能。 还描述了制造方法。
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公开(公告)号：US12039690B2
公开(公告)日：2024-07-16
申请号：US17362645
申请日：2021-06-29
发明人： David Justin Rappaport , Russell I. Sanchez , Jonathan L. Worsley , Kae-Ling J. Gurr , Karlton David Powell
摘要： A method for processing a stream of input images is described. A stream of input images that are from an image sensor is received. The stream comprises an initial sequence of input images including a subject having an initial orientation. A change in an angular orientation of the image sensor while receiving the stream of input images is determined. In response to determining the change in the angular orientation, a subsequent sequence of input images of the stream of input images is processed for rotation to counteract the change in the angular orientation of the image sensor and maintain the subject in the initial orientation. The stream of input images is transmitted to one or more display devices.
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公开(公告)号：US10223952B2
公开(公告)日：2019-03-05
申请号：US15335336
申请日：2016-10-26
发明人： Karlton David Powell , Ying Zheng
IPC分类号： G09G3/36 , G09G3/02 , G02F1/1335 , G09G3/3208 , G02F1/1333
摘要： An electronic display comprises a display matrix and an image-correcting layer. The display matrix includes a flat face portion, a curved corner portion, a light-releasing surface, and a series of pixels extending across the flat face portion and around the curved corner portion. Coupled to the light-releasing surface of the display matrix, the image-correcting layer is configured to transmit light released from the flat face portion of the display matrix and to reorient light released from the curved corner portion of the display matrix such that the transmitted light and the reoriented light exit the image-correcting layer substantially in parallel, forming an apparent plane image of the series of pixels.
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公开(公告)号：US10015378B2
公开(公告)日：2018-07-03
申请号：US15266884
申请日：2016-09-15
发明人： Karlton David Powell
CPC分类号： H04N5/2254 , G02B7/003 , G03B17/02 , G03B17/04 , H04N5/2257
摘要： An electronic device comprising a split camera in front and back portions, and a retaining member. The front portion of the camera includes a set of front mounting features and a light-collecting unit configured to collect light from a subject. The back portion of the camera is reversibly separable from the front portion; it includes a set of back mounting features and an imaging unit configured to image the light. The set of back mounting features is configured to contact the set of front mounting features as the front and back portions are drawn together, forming, cooperatively, a kinematic mount to hold the light-collecting and imaging units in a state of alignment. The retaining member is configured to couple the front portion to the back portion when the front and back portions are drawn together and also when the front and back portions are separated.
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公开(公告)号：US20180077326A1
公开(公告)日：2018-03-15
申请号：US15266884
申请日：2016-09-15
发明人： Karlton David Powell
CPC分类号： H04N5/2254 , G02B7/003 , G03B17/02 , G03B17/04 , H04N5/2257
摘要： An electronic device comprising a split camera in front and back portions, and a retaining member. The front portion of the camera includes a set of front mounting features and a light-collecting unit configured to collect light from a subject. The back portion of the camera is reversibly separable from the front portion; it includes a set of back mounting features and an imaging unit configured to image the light. The set of back mounting features is configured to contact the set of front mounting features as the front and back portions are drawn together, forming, cooperatively, a kinematic mount to hold the light-collecting and imaging units in a state of alignment. The retaining member is configured to couple the front portion to the back portion when the front and back portions are drawn together and also when the front and back portions are separated.
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公开(公告)号：US09864119B2
公开(公告)日：2018-01-09
申请号：US14848967
申请日：2015-09-09
发明人： Karlton David Powell
CPC分类号： G02B5/281 , B29C41/20 , B29D11/00634 , G02B5/208 , G02B5/223
摘要： An infrared filter includes a substrate having a front and surface. The infrared filter includes screened ink and an optically clear medium, or dye impregnated medium. The screened ink has a front surface nearest the substrate and a back surface. The screened ink has a first index of refraction. The optically clear medium abuts at least a portion of the back surface of the screened ink. The optically clear medium has a second index of refraction that differs from the first index of refraction of the screened ink by less than a predetermined amount. The dye impregnated medium has a spectral transmission over an infrared wavelength of greater than 70% and a spectral transmission over a visible light wavelength of less than 5%, while at same time maintaining MTF performance of a vision system imaging through the filter. Methods of manufacture are also described.
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