VR Image Depth Consistency via Gyroscope and Spherical FOV

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Solution Overview

Problem

Conventional VR technology exhibits poor realness of visual effects due to inconsistencies between the size and position of the scenery viewed and the user's head rotation, leading to an unrealistic experience.

Innovation Solution

The method involves setting the scene Field of View (FOV) of a VR apparatus to match the photographic FOV, rendering images on an arc surface corresponding to the scene FOV, and using a gyroscope sensor to adjust the display area, ensuring that image depth remains consistent during head rotation, thereby enhancing the realism of the VR experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a frame is rendered to a spherical inner surface randomly with FOV in the center, then the frame can be viewed at any FOV, but the image depth changes with head rotation and the visual effects become unrealistic

Engineering Contradiction:

Improveviewability at any FOVVSAvoidimage depth consistency

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies spherical geometry to map the photographic material picture onto a spherical inner surface, where the scene FOV corresponds to a specific arc radius. This curved surface mapping ensures that image depth remains consistent during head rotation, resolving the contradiction between viewability and image depth consistency.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent changes the parameter of FOV mapping from a flat 2D plane to a spherical surface with specific arc radius corresponding to the scene FOV. This parameter transformation allows the image to maintain proper depth perception while remaining viewable across different FOV angles.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the scene FOV differs from the photographic FOV, then the frame can be displayed, but the image depth changes during head rotation reducing realism

Engineering Contradiction:

Improvedisplay capabilityVSAvoidvisual realism

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent explicitly sets the scene FOV parameter to match the photographic FOV parameter, ensuring that the arc radius on the spherical surface corresponds to the actual field of view of the photographic material. This parameter alignment maintains visual realism while enabling proper display functionality.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If FOV is placed in the center of the sphere, then the frame can be viewed at any angle, but the scenery position deviates from head rotation

Engineering Contradiction:

Improveviewing angle flexibilityVSAvoidscenery position accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

By mapping the scene onto a spherical inner surface with arc radius corresponding to the scene FOV, the patent ensures that angular relationships are preserved during head rotation. The spherical geometry naturally maintains position accuracy while allowing viewing from any angle.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent pre-calculates and sets the scene FOV based on the photographic FOV before rendering, establishing the correct spherical mapping in advance. This preliminary configuration ensures that position accuracy is maintained during subsequent head rotations without requiring real-time adjustments.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach results in a more realistic VR experience by maintaining consistent image depth and size during user rotation, improving the overall display effects of the VR apparatus.

Implementation Method 1

using a gyroscope sensor to adjust the display area, ensuring that image depth remains consistent during head rotation

Methodology Applied

Scientific EffectGyroscope: Gyroscope

Data Source

PatentEP3462283B1Image display method and device utilized in virtual reality-based apparatus

Publication Date: 2021.09.01 TENCENT TECHNOLOGY (SHENZHEN) CO LTD

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AI summary

Embodiments of the present invention disclose a method and device for displaying an image based on a virtual reality (VR) apparatus, and a computer storage medium. The method includes: acquiring a photographic material picture, and acquiring a photographic field of view (FOV) of the photographic material picture; setting a scene FOV of a virtual scene of the VR apparatus according to the photographic FOV; generating a scene image according to the photographic material picture and the scene FOV, and determining a size of the scene image according to the scene FOV; and determining a display area of the scene image by using a gyroscope sensor, and displaying the display area on a display screen of the VR apparatus.