Virtual Scene Projection Mapping for Accurate Simulator Displays

Solution Overview

Problem

Existing picture projection methods require complex and inaccurate correction processes using cameras to ensure consistency between projected images and actual scenes, leading to inefficiencies.

Innovation Solution

A method and apparatus that utilize an image generator to perform scene rendering based on virtual scene data, map the scene to a to-be-projected picture using a predefined mapping relationship, and project the image using a projection device, eliminating the need for camera-based corrections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If camera-based projection correction is used, then projection picture consistency can be achieved, but the correction process becomes complex and accuracy decreases

Engineering Contradiction:

Improveprojection picture consistencyVSAvoidcorrection process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical camera-based correction system with a computational mapping system. Instead of using physical cameras to capture and compare projection pictures, the invention uses a pre-established mapping relationship between screen coordinates and image coordinates to directly calculate and correct projection images, eliminating the need for complex camera-based measurement and comparison processes

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent performs preliminary action by pre-establishing the mapping relationship between screen coordinates and image coordinates before actual projection correction is needed. This mapping relationship is calculated in advance based on projector parameters and screen geometry, allowing rapid correction without requiring real-time camera-based measurement and analysis

Inventive Principle:

Principle #10Preliminary action

2Reliability

If camera-based projection correction is used, then projection picture consistency can be achieved, but correction accuracy is reduced

Engineering Contradiction:

Improveprojection picture consistencyVSAvoidcorrection accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent replaces the mechanical camera-based correction system with a computational mapping system. Instead of using physical cameras to capture and compare projection pictures, the invention uses a pre-established mapping relationship between screen coordinates and image coordinates to directly calculate and correct projection images, eliminating the need for complex camera-based measurement and comparison processes

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent creates a mathematical model (mapping relationship) that copies and represents the geometric relationship between the projector and screen. This virtual model allows for precise coordinate transformation and image correction without requiring physical measurement devices, thereby maintaining high correction accuracy

Inventive Principle:

Principle #26Copying

3Reliability

If camera-based projection correction is used, then projection consistency can be verified, but processing time increases

Engineering Contradiction:

Improveprojection consistencyVSAvoidcorrection efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent performs preliminary action by pre-establishing the mapping relationship between screen coordinates and image coordinates before actual projection correction is needed. This mapping relationship is calculated in advance based on projector parameters and screen geometry, allowing rapid correction without requiring real-time camera-based measurement and analysis

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces the mechanical camera-based correction system with a computational mapping system. Instead of using physical cameras to capture and compare projection pictures, the invention uses a pre-established mapping relationship between screen coordinates and image coordinates to directly calculate and correct projection images, eliminating the need for complex camera-based measurement and comparison processes

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20260004509A1Picture Projection Methods and Systems

Publication Date: 2026.01.01 TENCENT TECHNOLOGY (SHENZHEN) CO LTD

AI summary

Aspects described herein disclose picture projection techniques in virtual environments. The techniques may be performed by a vehicle simulator, the vehicle simulator may include an image generator and a projection device. The techniques may include performing scene rendering using the image generator based on scene data, to obtain a first scene picture, the scene data indicating a scene falling within a field of view when a first virtual scene is observed from a first virtual viewpoint, and the first scene picture being located in an image space; mapping the first scene picture to a to-be-projected picture using the image generator based on a first mapping relationship between the first virtual viewpoint and the image space, the to-be-projected picture being located in the image space; and performing projection display using the projection device based on a pixel value corresponding to each coordinate point in the to-be-projected picture, to obtain a projection picture. Picture projection accuracy is improved using the described techniques.