Dynamic Projection Center for Arbitrary CAVE Window Placement

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Solution Overview

Problem

Existing CAVE systems require fixed projection window positions, limiting user interaction and resulting in poor visual experience and decreased image output efficiency due to adverse effects on data interaction and image processing.

Innovation Solution

A projection method with multiple rectangular planes at arbitrary positions and a variable projection center, where the user viewpoint position is updated to ensure a predetermined horizontal field of view angle, allowing for dynamic re-projection and effective image data output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If projection window positions are fixed beforehand, then the projection system structure is simple, but the adaptability to user position and visual experience deteriorates

Engineering Contradiction:

Improveadaptability to user positionVSAvoidprojection system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic projection window positioning that adjusts according to user viewpoint position. The projection windows are no longer fixed but dynamically repositioned based on real-time user location data, allowing the system to adapt to different user positions while maintaining a relatively simple overall system structure through software-based control.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the positional parameters of projection windows dynamically based on user position. By modifying the coordinates and orientation parameters of projection planes in real-time, the system achieves adaptability to different user locations without requiring physical reconfiguration of the projection equipment.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If projection windows are placed at arbitrary positions, then the adaptability and visual experience improve, but the image processing complexity and output efficiency deteriorate

Engineering Contradiction:

Improveprojection window placement flexibilityVSAvoidimage output efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system performs preliminary calculations of projection parameters and transformation matrices before actual image rendering. By pre-computing the necessary geometric transformations and projection channels based on user position, the system prepares all required data in advance, enabling efficient real-time rendering without compromising image output speed.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex mechanical image processing with computational geometry and matrix transformations. Instead of using complex optical mechanisms to handle arbitrary projection positions, the system uses software-based coordinate transformations and projection matrix calculations to achieve the same effect more efficiently.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Loss of information

If projection windows are placed at arbitrary positions, then the data interaction with user visual position improves, but the projection processing complexity increases

Engineering Contradiction:

Improvedata interaction qualityVSAvoidprojection processing complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent implements a universal projection framework that can handle arbitrary window positions, orientations, and user locations through a single set of mathematical transformations. The projection matrix system serves multiple functions simultaneously: calculating window positions, determining field of view angles, and transforming image coordinates, thereby reducing overall processing complexity despite the flexibility provided.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10522116B2Projection method with multiple rectangular planes at arbitrary positions to a variable projection center

Publication Date: 2019.12.31 HANGZHOU YIYUQIANXIANG TECH CO LTD

AI summary

This invention provides a projection method with multiple rectangular planes at arbitrary positions to a variable projection center, including: obtaining a user viewpoint position; comparing a horizontal field of view angle between the user viewpoint position and each visual plane with a predetermined range, wherein if the horizontal field of view angle fails to be within the predetermined range, the user viewpoint position is updated to a new user viewpoint position, such that the horizontal field of view angle between the new user viewpoint position and each visual plane is just within the predetermined range; and respectively generating projection channel corresponding to each visual plane based on the user viewpoint position and performing projecting. The technical solution of the present invention can achieve the information interaction between the projection position of the CAVE system and the actual visual position of the user and the processing of the information.