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1. 发明申请

WO2020176226A1 MULTI-SPECTRAL FLUORESCENT IMAGING 审中-公开
公开(公告)号：WO2020176226A1
公开(公告)日：2020-09-03
申请号：PCT/US2020/017358
申请日：2020-02-07
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio , PACE, Maria Esther , AKKAYA, Onur Can , FENTON, Michael Scott
IPC分类号： G01N21/64 , G01J3/44 , G01N21/01
摘要： A camera system (102) includes one or more spectral illuminators (104), a tunable optical filter (110), and a sensor array (108). Active spectral light emitted from the one or more spectral illuminators (104) towards a scene is dynamically tuned to an illumination sub-band selected from a plurality of different illumination sub-bands. Sequentially for each of a plurality of fluorescing light sub-bands different than the selected illumination sub-band, the tunable optical filter (110) is adjusted to block light from being transmitted from the scene to the sensor array (108) in all but a tested fluorescing light sub-band from the plurality of different fluorescing light sub-bands, and the sensor array (108) is addressed to acquire one or more images (118) of the scene in the tested fluorescing light sub-band.

2. 发明申请

WO2020159655A1 MULTIPATH MITIGATION FOR TIME OF FLIGHT SYSTEM 审中-公开
公开(公告)号：WO2020159655A1
公开(公告)日：2020-08-06
申请号：PCT/US2019/068929
申请日：2019-12-30
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio , LIN, Hung-Ming
IPC分类号： G01S7/493 , G01S17/89
摘要： A time-of-flight (ToF) system (100) disclosed herein provides a method of separating a direct component of light (112) collected by a ToF detector from a global component of light (112a, 112b) collected by the ToF detector (120), the method comprising acquiring three or more images represented by three or more matrices in response to illuminating a target (150) with a light source using a first spatial pattern (132a, 132b, 132c) at three or more different modulation frequencies, acquiring an additional image represented by an additional matrix in response to illuminating the target with the light source using a second spatial pattern (134), the second spatial pattern being different than the first spatial pattern, and determining one or more parameters of the direct component of light (112) and the global component of light (112a, 112b) based on analysis of the three or more matrices and the additional matrix. The direct component is due to the direct illumination of a point in the scene by the source of light and the global component is due to the indirect illumination of the scene point. A ToF module (102) includes a computing module (104) that includes a processor (106) and a spatial pattern data store (108). The spatial patterns (132a, 132b, 132c and 134) are two dimensional patterns that map to the two-dimensional grid of light source elements (110a, 110b). Light source (110) may include a large number of light source pixels. The scattering of each of the direct light component (112) and the global light component (112a) at the point (154) results in a total light signal (114) that is captured by a camera (120) of the ToF module (102). The combination of imaging lens (116), light sampling array (124), and sampler (124) receives and converts the total light signal (114) into a sampled signal (126) that is communicated to a multipath mitigation module (128). The multipath mitigation module 128 includes an image analyzer (130) that analyzes images captured by the camera (120) to determine various parameters of a direct component and a global component of the total light signal (114. 44). A denoising module (140) generates a denoising coefficient ξ(m,n) to increase the signal to noise ratio (SNR) where m and n denote a size of a kernel matrix applied to each pixel location.

3. 发明申请

WO2020086267A1 USER-SPECIFIC EYE TRACKING CALIBRATION FOR NEAR-EYE-DISPLAY (NED) DEVICES 审中-公开
公开(公告)号：WO2020086267A1
公开(公告)日：2020-04-30
申请号：PCT/US2019/055280
申请日：2019-10-09
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio , GAO, Jian Feng , LUNARDHI, Alfonsus D. , BULUSU, Venkata Satya Raghavendra
IPC分类号： G06F3/01 , G06K9/00 , G06T7/73
摘要： Technologies for performing user-specific calibration of eye tracking systems for Near-Eye- Display (NED) devices. The NED device may sequentially present different virtual stimuli to a user while concurrently capturing instances of eye tracking data. The eye tracking data reveals calibration ellipse centers that uniquely correspond to individual virtual stimuli. The calibration ellipse centers may be used define a polygon grid in association with a sensor plane. The resulting polygon grid is used during operation to interpolate the real-time gaze direction of the user. For example, a real-time instance of eye tracking data may be analyzed to determine which particular polygon of the polygon grid a real-time ellipse center falls within. Then, distances between the real-time ellipse center and the vertices of the particular polygon may be determined. A proportionality factor is then determined based on these distances and is used to interpolate the real-time eye gaze of the user.

4. 发明申请

WO2023027804A1 DENOISING DEPTH DATA OF LOW-SIGNAL PIXELS 审中-公开
公开(公告)号：WO2023027804A1
公开(公告)日：2023-03-02
申请号：PCT/US2022/035396
申请日：2022-06-29
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio , CHA, Augustine
IPC分类号： G06T5/00
摘要： Examples are provided relating to recovering depth data from noisy phase data of low-signal pixels. One example provides a computing system, comprising a logic machine, and a storage machine holding instructions executable by the logic machine to process depth data by obtaining depth image data (406) and active brightness image data (408) for a plurality of pixels, the depth image data comprising phase data for a plurality of frequencies, and identifying low-signal pixels (410) based at least on the active brightness image data. The instructions are further executable to apply a denoising filter to phase data of the low-signal pixels to obtain denoised phase data and not applying the denoising filter to phase data of other pixels (412). The instructions are further executable to, after applying the denoising filter, perform phase unwrapping (418) on the phase data for the plurality of frequencies to obtain a depth image (420), and output the depth image.

5. 发明申请

WO2022240511A1 GRAPHICAL ToF PHASE UNWRAPPING 审中-公开
公开(公告)号：WO2022240511A1
公开(公告)日：2022-11-17
申请号：PCT/US2022/024148
申请日：2022-04-09
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio , PERRY, Travis Jon
IPC分类号： G01S7/4915 , G01S17/32 , G01S17/894 , G06F18/2134 , G06F18/2137 , G06T2207/20041 , G06T7/521 , G06V10/75 , G06V10/751
摘要： One example provides a computing system comprising a depth sensor comprising a plurality of pixels, and a storage machine holding instructions executable by a logic machine to, for each pixel, make K phase measurements to form a set of noisy phase measurements, determine a location at which a projection line that passes through the set of noisy phase measurements in a K-dimensional phase space passes through a lower dimensional plane, the projection line being parallel to a noise free phase evolution line, compare the location to a plurality of independent terms of a predetermined matrix of points in the lower dimensional plane, locate a corresponding set of noiseless phase orders by using a selected set of independent terms to reference a look-up table, determine a distance value for the pixel based upon the corresponding set of noiseless phase orders, and output the distance value for the pixel.

6. 发明申请

WO2020086244A1 INTERPRETING EYE GAZE DIRECTION AS USER INPUT TO NEAR-EYE-DISPLAY (NED) DEVICES FOR ENABLING HANDS FREE POSITIONING OF VIRTUAL ITEMS 审中-公开
公开(公告)号：WO2020086244A1
公开(公告)日：2020-04-30
申请号：PCT/US2019/054912
申请日：2019-10-07
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： PACE, Maria Esther , ORTIZ EGEA, Sergio
IPC分类号： G06F3/01 , G02B27/00 , G02B27/01 , G06T7/70
摘要： A Near-Eye-Display (NED) device utilizes eye tracking to interpret gaze direction as user input for hands free positioning of virtual items. The NED device includes an eye tracking system to monitor gaze direction and a display component that renders virtual items within a user's view of a physical real-world environment. The NED device receives an indication that the user desires to adjust a position of the virtual item. In response, the NED device uses tracks the user's eye movements to dynamically change the position at which the display component is rendering the virtual item. In this way, a NED device may identify when a user desires to adjust a position at which a virtual item is being rendered and then may enable the user to make the desired adjustments simply by "dragging" the virtual item with deliberate and controlled eye movements.

7. 发明申请

WO2020086243A1 EYE TRACKING SYSTEMS AND METHODS FOR NEAR-EYE-DISPLAY (NED) DEVICES 审中-公开
公开(公告)号：WO2020086243A1
公开(公告)日：2020-04-30
申请号：PCT/US2019/054911
申请日：2019-10-07
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio , BULUSU, Venkata Satya Raghavendra , KRESS, Bernard C. , LUNARDHI, Alfonsus D. , AKKAYA, Onur Can
IPC分类号： G06F3/01 , G06K9/00 , G06T7/73
摘要： An eye tracking system for a NED device includes sensors that are directed toward and angularly offset from a user's eyes in a manner that causes circular features (e.g., irises and/or pupils) of the user's eyes to appear elliptical within sensor planes that correspond to the individual sensors. The eye tracking system determines parameters associated with detected ellipses and then uses these parameters to generate 3D propagations from the detected ellipses back to the user's eyes. By analyzing these 3D propagations with respect to ocular rotation models that represent how the pupils and iris rotate about the center of the eye, the eye tracking system determines pupil orientation parameters that define physical characteristics of the user's eyes. The pupil orientation parameters may then be used to determine interpupillary distance and/or vergence of the user's visual axis that extend from the user's fovea.

8. 发明申请

WO2019217110A1 PHASE WRAPPING DETERMINATION FOR TIME-OF-FLIGHT CAMERA 审中-公开
公开(公告)号：WO2019217110A1
公开(公告)日：2019-11-14
申请号：PCT/US2019/029529
申请日：2019-04-27
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio
IPC分类号： G01S17/42 , G01S17/89
摘要： A time-of-flight (ToF) camera is configured to illuminate a subject with IR light. For each sensor of a sensor array, camera space coordinates of a locus of the subject are determined based on the measured IR light. The camera space coordinates include a phase difference between emitted IR light and reflected IR light. A plurality of candidate positions of the locus of the subject are determined in world space based on the camera space coordinates. Each candidate position corresponds to a different phase wrapping of the phase difference. A phase wrapping is determined based on performing a searching algorithm on the different candidate positions. A depth value for the sensor is calculated based on the phase difference and the phase wrapping determined from performing the searching algorithm. A matrix of pixels is outputted from the camera. Each pixel of the matrix includes a depth value.

9. 发明申请

WO2022169603A1 DETERMINING PHASE ORDERS IN ToF IMAGING 审中-公开
公开(公告)号：WO2022169603A1
公开(公告)日：2022-08-11
申请号：PCT/US2022/013037
申请日：2022-01-20
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： ORTIZ EGEA, Sergio
IPC分类号： G01S17/36 , G01S17/894 , G01S7/4915 , G01S7/493
摘要： Examples are disclosed that relate to determining phase orders for phase data in a time-of-flight camera sensor, for use in unwrapping the phase data. One example provides a computing system comprising a depth sensor comprising a plurality of pixels, an illumination source, and a storage machine holding instructions executable by a logic machine to control the illumination source to output amplitude-modulated light at two or more modulation frequencies. The instructions are further executable to, for each pixel, make two or more phase measurements corresponding to different modulation frequencies, based at least on the two or more phase measurements, determine a series of phase order sets, determine a most likely phase order set by comparing the series of phase order sets to a line representing an evolution of phase with distance, and based on the most likely phase order set, determine a distance value associated with the pixel.

10. 发明申请

WO2020190575A1 VARIFOCAL DISPLAY WITH FIXED-FOCUS LENS 审中-公开
公开(公告)号：WO2020190575A1
公开(公告)日：2020-09-24
申请号：PCT/US2020/021927
申请日：2020-03-10
申请人： MICROSOFT TECHNOLOGY LICENSING, LLC
发明人： AKKAYA, Onur Can , KRESS, Bernard Charles , ORTIZ EGEA, Sergio , LUNARDHI, Alfonsus D.
IPC分类号： G02B27/01
摘要： A near-eye display system comprises a display projector configured to emit display light, an optical waveguide, a fixed-focus lens, and a variable-focus lens of variable optical power. The optical waveguide is configured to receive the display light and to release the display light toward an observer. The fixed-focus lens is arranged to adjust a vergence of the display light released from the optical waveguide. The variable-focus lens is arranged in series with the fixed-focus lens and configured to vary, responsive to a focusing bias, the vergence of the display light released from the optical waveguide.

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