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1. 发明授权

US11663704B2 Distortion correction via modified analytical projection 有权
公开(公告)号：US11663704B2
公开(公告)日：2023-05-30
申请号：US17243405
申请日：2021-04-28
申请人： Microsoft Technology Licensing, LLC
发明人： Karlton David Powell
IPC分类号： H04N7/15 , G06T5/00 , G06T3/00 , H04N5/262
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.

2. 发明授权

US11508090B2 Methods for calibrating offset of optical center using kinematic mount 有权
公开(公告)号：US11508090B2
公开(公告)日：2022-11-22
申请号：US17209029
申请日：2021-03-22
申请人： Microsoft Technology Licensing, LLC
发明人： Michael C. Lin , Rhishikesh A. Sathe , Karlton David Powell
IPC分类号： H04N5/228 , G06T7/80 , H04N5/225 , H04N5/232 , G06T3/60
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.

3. 发明授权

US11204152B2 Illumination device having reflector with concave and convex symmetrical surfaces 有权
公开(公告)号：US11204152B2
公开(公告)日：2021-12-21
申请号：US16655129
申请日：2019-10-16
申请人： Microsoft Technology Licensing, LLC
发明人： Karlton David Powell
IPC分类号： F21V7/09 , F21V3/04 , G02B5/10 , F21V13/02 , G03B15/05 , F21Y115/10
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.

4. 发明授权

US10049272B2 User authentication using multiple capture techniques 有权
公开(公告)号：US10049272B2
公开(公告)日：2018-08-14
申请号：US14864622
申请日：2015-09-24
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： Mudit Agrawal , Karlton David Powell , Christopher Maurice Mei
IPC分类号： G06K9/00 , G06F21/32 , G06K9/20 , G06K9/22
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.

5. 发明申请

US20170068027A1 INFRARED FILTER 有权
标题翻译：红外线过滤器
公开(公告)号：US20170068027A1
公开(公告)日：2017-03-09
申请号：US14848967
申请日：2015-09-09
申请人： Microsoft Technology Licensing, LLC
发明人： Karlton David Powell
IPC分类号： G02B5/28 , B29C41/20
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。

6. 发明授权

US10001845B2 3D silhouette sensing system 有权
公开(公告)号：US10001845B2
公开(公告)日：2018-06-19
申请号：US15623332
申请日：2017-06-14
申请人： Microsoft Technology Licensing, LLC
发明人： David Kim , Shahram Izadi , Vivek Pradeep , Steven Bathiche , Timothy Andrew Large , Karlton David Powell
IPC分类号： G06F3/01 , G06F3/041 , G01B11/24 , G06F3/042 , G06K9/52 , G06K9/00 , H04N5/33 , G06K9/46 , G06F3/03 , H04N13/02 , G06K9/20
CPC分类号： G06F3/017 , G01B11/24 , G06F3/0325 , G06F3/0416 , G06F3/0421 , G06F3/0425 , G06K9/00355 , G06K9/00362 , G06K9/2036 , G06K9/4604 , G06K9/52 , H04N5/33 , H04N13/204
摘要： A 3D silhouette sensing system is described which comprises a stereo camera and a light source. In an embodiment, a 3D sensing module triggers the capture of pairs of images by the stereo camera at the same time that the light source illuminates the scene. A series of pairs of images may be captured at a predefined frame rate. Each pair of images is then analyzed to track both a retroreflector in the scene, which can be moved relative to the stereo camera, and an object which is between the retroreflector and the stereo camera and therefore partially occludes the retroreflector. In processing the image pairs, silhouettes are extracted for each of the retroreflector and the object and these are used to generate a 3D contour for each of the retroreflector and object.

7. 发明申请

US20180074639A1 TOUCH-DISPLAY ACCESSORY WITH RELAYED DISPLAY PLANE 审中-公开
公开(公告)号：US20180074639A1
公开(公告)日：2018-03-15
申请号：US15265622
申请日：2016-09-14
申请人： Microsoft Technology Licensing, LLC
发明人： Karlton David Powell , Pablo Luis Sala
IPC分类号： G06F3/041 , G06F3/044 , G06F3/0362 , G06F3/0484
CPC分类号： G06F3/04847 , G06F3/0338 , G06F3/0362 , G06F3/0383 , G06F3/039 , G06F3/044 , G06F2203/04805
摘要： An accessory for a touch-sensitive display includes an image transfer structure and a capacitive marker. The image transfer structure is configured to relay or transfer, above the touch-sensitive display, an optical display plane of an image displayed by the touch-sensitive display. Further, the capacitive marker is capacitively-recognizable by the touch-sensitive display such that the touch-sensitive display visually presents the image in alignment with the image transfer structure.

8. 发明授权

US09720506B2 3D silhouette sensing system 有权
公开(公告)号：US09720506B2
公开(公告)日：2017-08-01
申请号：US14154571
申请日：2014-01-14
申请人： Microsoft Technology Licensing, LLC
发明人： David Kim , Shahram Izadi , Vivek Pradeep , Steven Bathiche , Timothy Andrew Large , Karlton David Powell
IPC分类号： G06F3/01 , G01B11/24 , G06K9/00 , H04N13/02 , H04N5/33 , G06K9/52 , G06F3/042 , G06F3/041 , G06F3/03 , G06K9/20 , G06K9/46
CPC分类号： G06F3/017 , G01B11/24 , G06F3/0325 , G06F3/0416 , G06F3/0421 , G06F3/0425 , G06K9/00355 , G06K9/00362 , G06K9/2036 , G06K9/4604 , G06K9/52 , H04N5/33 , H04N13/204
摘要： A 3D silhouette sensing system is described which comprises a stereo camera and a light source. In an embodiment, a 3D sensing module triggers the capture of pairs of images by the stereo camera at the same time that the light source illuminates the scene. A series of pairs of images may be captured at a predefined frame rate. Each pair of images is then analyzed to track both a retroreflector in the scene, which can be moved relative to the stereo camera, and an object which is between the retroreflector and the stereo camera and therefore partially occludes the retroreflector. In processing the image pairs, silhouettes are extracted for each of the retroreflector and the object and these are used to generate a 3D contour for each of the retroreflector and object.

9. 发明授权

US09653044B2 Interactive display system 有权
公开(公告)号：US09653044B2
公开(公告)日：2017-05-16
申请号：US14598129
申请日：2015-01-15
申请人： Microsoft Technology Licensing, LLC
发明人： Timothy Andrew Large , Steven Bathiche , Karlton David Powell
IPC分类号： G03B21/60 , G09G5/373 , G06F3/00
CPC分类号： G09G5/373 , G02B27/017 , G03B21/10 , G03B21/58 , G03B21/60 , G06F3/005 , G09G2340/145 , G09G2358/00 , G09G2360/10
摘要： A display system comprises a head-mounted projector including an exit aperture and a projection engine to project image light through the exit aperture. The image light is projected onto a retro-reflective display that reflects image light in a first dimension at above 90% efficiency within a 25 degree exit angular spread and reflects image light in the first dimension below 10% efficiency outside of a 35 degree exit angular spread.

10. 发明授权

US09494726B2 Switchable backlight unit 有权
标题翻译：可切换背光单元
公开(公告)号：US09494726B2
公开(公告)日：2016-11-15
申请号：US14288242
申请日：2014-05-27
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： Karlton David Powell
IPC分类号： F21V8/00
CPC分类号： G02B6/0051 , G02B6/0021 , G02B6/0028 , G02B6/0046 , G02B6/0055 , G02B6/0061 , G02B6/0068
摘要： Embodiments for a backlight unit are provided. In one example, a backlight unit comprises a light guide configured to receive light at a first light interface located at an end of the light guide and output light via a second light interface located at a face of the light guide, and a plurality of light sources configured to inject light into the light guide at the first light interface. The example backlight unit also comprises a graded index film configured to receive light from the second light interface of the light guide, homogenize received light that is incident on the graded index film from within a range of acceptance angles and not homogenize light incident on the graded index film from outside of the range of acceptance angles, and direct the homogenized light toward an eye box.
摘要翻译：提供背光单元的实施例。在一个示例中，背光单元包括导光器，其被配置为在位于光导的端部处的第一光接口处接收光，并且经由位于光导的表面处的第二光接口输出光，以及多个光源被配置为在第一光接口处将光注入光导中。示例性背光单元还包括被配置为从光导的第二光接口接收光的渐变折射率膜，在接收角度范围内使入射在渐变折射率膜上的接收光均匀化，并且不使入射在等级上的光均匀化从接受角度范围外的指纹膜，并将均匀化的光线引导到眼箱。

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