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公开(公告)号：US11107178B2
公开(公告)日：2021-08-31
申请号：US16391078
申请日：2019-04-22
Applicant: Valve Corporation
Inventor： Alex Vlachos , Kenneth Barnett
Abstract: Systems and methods for implementing radial density masking graphics rendering for use in applications such as head mounted displays (“HMDs”) are described. Exemplary algorithms are disclosed, according to which image resolution varies within an image depending on the distance of a particular point on the image from one or more fixation points. Reconstruction algorithms according to certain embodiments include three stages: (1) hole filling; (2) cross-cell blending; and (3) Gaussian blur.
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公开(公告)号：US10520739B1
公开(公告)日：2019-12-31
申请号：US16033162
申请日：2018-07-11
Applicant: Valve Corporation
Inventor： Alex Vlachos
Abstract: A panel mask(s) rendered on a display panel(s) of a head-mounted display (HMD) may be dynamically adjusted (increased and decreased) in size in order to hide unwanted visual artifacts from view, as needed. For example, if frames are being rendered on the display panel of the HMD using re-projection, a size value associated with at least a portion of the panel mask can be adjusted based on rotation of the HMD to increase or decrease a size of at least the portion of the panel mask from a current size to an adjusted size, and the panel mask can be rendered with at least the portion of the panel mask rendered at the adjusted size to hide the unwanted visual artifacts. The size of the portion of the panel mask can subsequently decrease, over a period of time, if re-projection ceases and/or if head rotation ceases or slows down.
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公开(公告)号：US10948730B2
公开(公告)日：2021-03-16
申请号：US16712370
申请日：2019-12-12
Applicant: Valve Corporation
Inventor： Alex Vlachos
Abstract: A panel mask(s) rendered on a display panel(s) of a head-mounted display (HMD) may be dynamically adjusted (increased and decreased) in size in order to hide unwanted visual artifacts from view, as needed. For example, if frames are being rendered on the display panel of the HMD using re-projection, a size value associated with at least a portion of the panel mask can be adjusted based on rotation of the HMD to increase or decrease a size of at least the portion of the panel mask from a current size to an adjusted size, and the panel mask can be rendered with at least the portion of the panel mask rendered at the adjusted size to hide the unwanted visual artifacts. The size of the portion of the panel mask can subsequently decrease, over a period of time, if re-projection ceases and/or if head rotation ceases or slows down.
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公开(公告)号：US20190304051A1
公开(公告)日：2019-10-03
申请号：US16391078
申请日：2019-04-22
Applicant: Valve Corporation
Inventor： Alex Vlachos , Kenneth Barnett
Abstract: Systems and methods for implementing radial density masking graphics rendering for use in applications such as head mounted displays (“HMDs”) are described. Exemplary algorithms are disclosed, according to which image resolution varies within an image depending on the distance of a particular point on the image from one or more fixation points. Reconstruction algorithms according to certain embodiments include three stages: (1) hole filling; (2) cross-cell blending; and (3) Gaussian blur.
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公开(公告)号：US11151776B2
公开(公告)日：2021-10-19
申请号：US16748599
申请日：2020-01-21
Applicant: Valve Corporation
Inventor： Aaron Leiby , Alex Vlachos
Abstract: Described herein are techniques for adjusting a prediction level and a throttle level, as frames are being rendered on a head-mounted display (HMD), based on an application's rendering performance. The prediction level is increased if a number of late frames, out of a past N rendered frames of (N being any suitable number), meets or exceeds a threshold number of late frames, which causes a compositor of the HMD to predict pose data of the HMD farther out into the future. The throttle level can be increased independently from, or in synchronization with, the increase in the prediction level to causes the compositor to throttle the frame rate of the application (e.g., to a fraction of the refresh rate of the HMD). The prediction level (and the throttle level, if at the same level) can be decreased if a particular number of consecutively-rendered frames finish rendering early.
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Patent Agency Ranking
公开(公告)号：US10733783B2
公开(公告)日：2020-08-04
申请号：US16155686
申请日：2018-10-09
Applicant: Valve Corporation
Inventor： Alex Vlachos , Aaron Leiby
Abstract: Described herein are motion smoothing techniques for a display system to account for motion of moving or animating objects in a way that mitigates judder. For example, first pixel data and second pixel data associated with two previously-rendered frames may be provided to a graphics processing unit (GPU) as input. The video encoder of the GPU can process the input pixel data to generate an array of motion vectors which is used to modify third pixel data of a re-projected frame. The modified third pixel data for the re-projected frame is “motion-smoothed” for rendering on a display, such as a head-mounted display (HMD), in a manner that mitigates judder of moving or animating objects.
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公开(公告)号：US20200111195A1
公开(公告)日：2020-04-09
申请号：US16155686
申请日：2018-10-09
Applicant: Valve Corporation
Inventor： Alex Vlachos , Aaron Leiby
Abstract: Described herein are motion smoothing techniques for a display system to account for motion of moving or animating objects in a way that mitigates judder. For example, first pixel data and second pixel data associated with two previously-rendered frames may be provided to a graphics processing unit (GPU) as input. The video encoder of the GPU can process the input pixel data to generate an array of motion vectors which is used to modify third pixel data of a re-projected frame. The modified third pixel data for the re-projected frame is “motion-smoothed” for rendering on a display, such as a head-mounted display (HMD), in a manner that mitigates judder of moving or animating objects.
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公开(公告)号：US20200160591A1
公开(公告)日：2020-05-21
申请号：US16748599
申请日：2020-01-21
Applicant: Valve Corporation
Inventor： Aaron Leiby , Alex Vlachos
Abstract: Described herein are techniques for adjusting a prediction level and a throttle level, as frames are being rendered on a head-mounted display (HMD), based on an application's rendering performance. The prediction level is increased if a number of late frames, out of a past N rendered frames of (N being any suitable number), meets or exceeds a threshold number of late frames, which causes a compositor of the HMD to predict pose data of the HMD farther out into the future. The throttle level can be increased independently from, or in synchronization with, the increase in the prediction level to causes the compositor to throttle the frame rate of the application (e.g., to a fraction of the refresh rate of the HMD). The prediction level (and the throttle level, if at the same level) can be decreased if a particular number of consecutively-rendered frames finish rendering early.
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公开(公告)号：US10311540B2
公开(公告)日：2019-06-04
申请号：US15420868
申请日：2017-01-31
Applicant: VALVE CORPORATION
Inventor： Alex Vlachos , Kenneth Barnett
IPC: G06T1/20
Abstract: Systems and methods for implementing radial density masking graphics rendering for use in applications such as head mounted displays (“HMDs”) are described. Exemplary algorithms are disclosed, according to which image resolution varies within an image depending on the distance of a particular point on the image from one or more fixation points. Reconstruction algorithms according to certain embodiments include three stages: (1) hole filling; (2) cross-cell blending; and (3) Gaussian blur.
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公开(公告)号：US10297077B1
公开(公告)日：2019-05-21
申请号：US15443558
申请日：2017-02-27
Applicant: VALVE CORPORATION
Inventor： Alex Vlachos
Abstract: Systems and methods for implementing hidden mesh (or stencil mesh) graphics rendering techniques for use in applications such as head mounted displays (“HMDs”) are described. Exemplary systems and algorithms are disclosed for masking or eliminating pixels in an image from the list of pixels to be rendered, based on the observation that a significant number of pixels in the periphery of HMD images cannot be seen, due to the specific details of the optical and display/electronics performance of each particular implementation.
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