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A head posture compensation method and device

A technology of head posture and compensation method, applied in the field of virtual reality, can solve the problems of influence, increase the display delay of VR system, and increase additional read and write operations.

Active Publication Date: 2020-04-14
ALLWINNER TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The asynchronous time warp and distortion chromatic aberration compensation in the prior art is realized by GPU, which requires the GPU to support high-priority task preemption, which affects the GPU throughput and increases the overall performance requirements of the GPU; at the same time, it is necessary to use the GPU to render the EyeBuffer to the Frame Buffer , and then scanned to the display by the display hardware, adding an additional read and write operation of the GPU; distortion chromatic aberration compensation and head posture compensation are completed in stages, which increases the display delay of the VR system

Method used

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  • A head posture compensation method and device

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Embodiment Construction

[0050] Now in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail. Such as figure 1 Shown is a flowchart of a head posture compensation method 100 according to an embodiment of the present invention.

[0051] Step 101 first predicts the rendering completion time t1 of the image frame to be displayed according to the display time of at least two rendered image frames and the time t0 when the image frame to be displayed is ready to start rendering. Among them, the time t0 from the time t0 to start rendering of the image frame to be displayed is very short. During this time, the head pose Q required for rendering F(n) will be ready, and the head pose Q will be calculated. After that, the rendering starts.

[0052] Step 103 calculates the start display time t2 of the image frame to be displayed according to the rendering completion time t1 of the image frame to be displayed predicted in step 101, and the star...

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Abstract

The invention relates to a method for head attitude compensation. The method comprises: according to display time of at least two rendered image frames, predicting rendering completion time t1 of a to-be-displayed image frame; according to the t1, calculating display start time t2 of the to-be-displayed image frame; according to the t2, calculating first time, predicting a first time head attitude Q, according to the head attitude Q, rendering the to-be-displayed image frame; according to start time a of any completed display cycle, calculating start time t of a to-be-displayed cycle; according to the t and the display cycle T, calculating second time, to obtain a second time head attitude Q', and according to the Q and the Q', calculating a head attitude compensation matrix; according to the attitude compensation matrix, performing attitude compensation calculation on the to-be-displayed image frame; according to vertex coordinates after attitude compensation and vertex coordinates of the to-be-displayed image frame, calculating a correction coefficient; and according to the correction coefficient, calculating a display image frame after the head attitude compensation. The method and the device accurately compensate head attitude of the to-be-displayed image frame, so that smear phenomenon and dizzy feeling in VR system use are reduced.

Description

technical field [0001] The present invention relates to the technical field of virtual reality, in particular to a head posture compensation method and device. Background technique [0002] Virtual reality technology generates the image frame to be displayed carrying the latest head posture information in real time through the computer, and then displays it on the display screen (display image frame), and finally the displayed image frame is projected to the human eye through the VR optical system, giving the user an immersive experience. immersive experience. Due to the existence of delay between the image frame to be displayed and the displayed image frame, the perceived head posture error will be introduced. In addition, the common VR optical system is a single-lens optical system, which will also introduce large distortion and chromatic aberration. Therefore, in virtual reality technology, there is an asynchronous time warp technology (Asynchronous Time Warp technology,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/14G06T5/50G06F3/01
CPCG06F3/012G06F3/013G06F3/1423G06T5/50
Inventor 陈玉双唐禹谱肖丹灵
Owner ALLWINNER TECH CO LTD
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