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公开(公告)号：US11941184B2
公开(公告)日：2024-03-26
申请号：US17524423
申请日：2021-11-11
Applicant: Snap Inc.
Inventor： Jeroen Diederik Hol , Matthias Kalkgruber
IPC: G06F3/0346 , G06F3/038
CPC classification number: G06F3/0346 , G06F3/038
Abstract: A method for dynamically initializing a 3 degrees of freedom (3DOF) tracking device is described. In one aspect, the method includes accessing a gyroscope signal from a gyroscope of the 3DOF tracking device, accessing an accelerometer signal from an accelerometer of the 3DOF tracking device, determining an initial state includes a combination of an initial orientation, an initial position, and an initial velocity of the 3DOF tracking device, the initial state indicating a starting condition of the 3DOF tracking device, integrating the gyroscope signal and the accelerometer signal to obtain orientation and position signals using the initial state, and refining an inclination signal of the orientation signal using the position signal.
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公开(公告)号：US20240029302A1
公开(公告)日：2024-01-25
申请号：US18373554
申请日：2023-09-27
Applicant: Snap Inc.
Inventor： Sagi Katz , Matthias Kalkgruber
CPC classification number: G06T7/74 , G06T7/593 , G06T7/33 , G06T19/006 , H04N13/239
Abstract: A method for correcting a bending of a flexible device is described. In one aspect, the method includes accessing feature data of a first stereo frame that is generated by stereo optical sensors of the flexible device, the feature data generated based on a visual-inertial odometry (VIO) system of the flexible device, accessing depth map data of the first stereo frame, the depth map data generated based on a depth map system of the flexible device, estimating a pitch-roll bias and a yaw bias based on the features data and the depth map data of the first stereo frame, and generating a second stereo frame after the first stereo frame, the second stereo frame based on the pitch-roll bias and the yaw bias of the first stereo frame.
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公开(公告)号：US20230360267A1
公开(公告)日：2023-11-09
申请号：US18198414
申请日：2023-05-17
Applicant: Snap Inc.
Inventor： Clemens Birklbauer , Georg Halmetschlager-Funek , Matthias Kalkgruber , Kai Zhou
CPC classification number: G06T7/80 , G06V10/443 , H04N17/002 , H04N23/61 , H04N23/651 , H04N23/6812
Abstract: A method for adjusting camera intrinsic parameters of a multi-camera visual tracking device is described. In one aspect, a method for calibrating the multi-camera visual tracking system includes disabling a first camera of the multi-camera visual tracking system while a second camera of the multi-camera visual tracking system is enabled, detecting a first set of features in a first image generated by the first camera after detecting that the temperature of the first camera is within the threshold of the factory calibration temperature of the first camera, and accessing and correcting intrinsic parameters of the second camera based on the projection of the first set of features in the second image and a second set of features in the second image.
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Patent Agency Ranking
公开(公告)号：US20230296902A1
公开(公告)日：2023-09-21
申请号：US18137729
申请日：2023-04-21
Applicant: Snap Inc.
Inventor： Clemens Birklbauer , Georg Halmetschlager-Funek , Jeroen Hol , Matthias Kalkgruber , Daniel Wagner
IPC: G02B27/01 , H04N13/344 , G06T19/00 , G06F3/01
CPC classification number: G02B27/0172 , G02B27/0176 , G06F3/011 , G06F3/017 , G06T19/006 , H04N13/344 , G02B2027/0138 , G02B2027/0154 , G02B2027/0178
Abstract: An eyewear device with flexible frame for Augmented Reality (AR) is disclosed. At least two sensors and a display are mounted on the flexible frame. When in use, the real time geometry of the eyewear device may change from factory calibrated geometry, resulting in low quality AR rendering. A modeling module is provided to model the real time geometry of the eyewear device on the fly using sensor information of the at least two sensors. The modeled real time geometry is then provided to a rendering module to accurately display the AR to the user.
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公开(公告)号：US11765457B2
公开(公告)日：2023-09-19
申请号：US17522642
申请日：2021-11-09
Applicant: Snap Inc.
Inventor： Bo Ding , Ozi Egri , Matthias Kalkgruber , Daniel Wolf
CPC classification number: H04N23/6811 , H04N23/684 , H04N23/6812 , G06T19/006
Abstract: A method for limiting motion blur in a visual tracking system is described. In one aspect, the method includes accessing a first image generated by an optical sensor of the visual tracking system, identifying camera operating parameters of the optical sensor for the first image, determining a motion of the optical sensor for the first image, determining a motion blur level of the first image based on the camera operating parameters of the optical sensor and the motion of the optical sensor, and adjusting the camera operating parameters of the optical sensor based on the motion blur level.
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公开(公告)号：US20220377306A1
公开(公告)日：2022-11-24
申请号：US17747564
申请日：2022-05-18
Applicant: Snap Inc.
Inventor： Olha Borys , Georg Halmetschlager-Funek , Matthias Kalkgruber , Daniel Wolf , Jakob Zillner
IPC: H04N13/128 , G06T7/73 , H04N13/239
Abstract: Disclosed are systems, methods, and non-transitory computer-readable media for misaligned vantage point mitigation for computer stereo vision. A misaligned vantage point mitigation system determines whether vantage points of the optical sensors are misaligned from an expected vantage point and, if so, determines an adjustment variable to mitigate the misalignment based on the location of matching features identified in images captured by both optical sensors.
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公开(公告)号：US20220377239A1
公开(公告)日：2022-11-24
申请号：US17522642
申请日：2021-11-09
Applicant: Snap Inc.
Inventor： Bo Ding , Ozi Egri , Matthias Kalkgruber , Daniel Wolf
IPC: H04N5/232
Abstract: A method for limiting motion blur in a visual tracking system is described. In one aspect, the method includes accessing a first image generated by an optical sensor of the visual tracking system, identifying camera operating parameters of the optical sensor for the first image, determining a motion of the optical sensor for the first image, determining a motion blur level of the first image based on the camera operating parameters of the optical sensor and the motion of the optical sensor, and adjusting the camera operating parameters of the optical sensor based on the motion blur level.
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公开(公告)号：US20220375128A1
公开(公告)日：2022-11-24
申请号：US17448655
申请日：2021-09-23
Applicant: Snap Inc.
Inventor： Clemens Birklbauer , Georg Halmetschlager-Funek , Matthias Kalkgruber , Kai Zhou
Abstract: A method for adjusting camera intrinsic parameters of a multi-camera visual tracking device is described. In one aspect, a method for calibrating the multi-camera visual tracking system includes disabling a first camera of the multi-camera visual tracking system while a second camera of the multi-camera visual tracking system is enabled, detecting a first set of features in a first image generated by the first camera after detecting that the temperature of the first camera is within the threshold of the factory calibration temperature of the first camera, and accessing and correcting intrinsic parameters of the second camera based on the projection of the first set of features in the second image and a second set of features in the second image.
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