Virtual Wearer Model for Visual Equipment Performance Evaluation
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Solution Overview
Problem
Current methods for evaluating visual equipment performance are limited as they do not provide direct information about a wearer's posture or gaze direction during visual tasks and require lengthy, expensive tests that cannot be reused for wearers differing from those tested.
Innovation Solution
A device and method that use virtual models of scenes and wearers to determine appropriate head postures and performance parameters for visual equipment, allowing for efficient and economic evaluation of visual equipment performance, including personalized assessments based on wearer characteristics and task-specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional test procedures with real persons are used to evaluate visual equipment performance, then measurement precision is improved, but loss of time and loss of energy increase
Solution Approach 1:
The patent creates a virtual model of the wearer that replicates the physical wearer's anatomical and optical characteristics. This virtual model can be repeatedly used to evaluate visual equipment performance without requiring repeated physical testing on real persons, thus reducing time loss while maintaining evaluation accuracy through computational simulation
Solution Approach 2:
The patent replaces the mechanical/physical testing system with a computational simulation system. Instead of physically testing visual equipment on real wearers, the system uses computer processing to simulate the optical performance by calculating light propagation through the visual equipment using the virtual model's anatomical data and optical characteristics
2Measurement precision
If traditional test procedures with real persons are used to evaluate visual equipment performance, then measurement precision is improved, but loss of energy increases
Solution Approach 1:
The virtual model serves as a digital copy of the physical wearer that can be instantiated and reused. Once created, the virtual model can perform multiple evaluation scenarios without requiring additional physical testing resources, thereby reducing the energy and cost associated with repeated traditional testing
Solution Approach 2:
The computational simulation system replaces expensive physical testing infrastructure with software-based evaluation. The system uses computer processors and algorithms to assess visual equipment performance, eliminating the need for costly physical test facilities, personnel, and materials while maintaining measurement precision
3Measurement precision
If traditional test procedures are used, then measurement precision for individual wearers is improved, but adaptability decreases because test results cannot be reused for wearers who significantly differ
Solution Approach 1:
The virtual model is designed to accommodate various wearer parameters such as age, gender, anatomical dimensions, and optical characteristics. By adjusting these parameters within the virtual model framework, the same evaluation system can adapt to different wearer populations without requiring separate test procedures, thus improving both precision for individuals and adaptability across groups
Solution Approach 2:
The virtual model serves multiple functions: it can represent a specific individual wearer for personalized evaluation, or it can be configured to represent different demographic groups and population characteristics. This multi-functionality allows the same evaluation system to serve both individual and population-level purposes, enhancing adaptability while maintaining measurement precision
Data Source
AI summary
This device for evaluating a performance of a visual equipment for at least one wearer of that equipment to perform at least one visual task includes: at least one input adapted to obtain a model of a scene where the task is performed, a model of the task including a sequence of points to be looked at, a model of the wearer including a movable head and at least one rotationally movable eye; at least one processor configured for determining a head posture for at least one of the points so that the model of the wearer looks respectively at that point, determining at least one task-directed performance parameter for the wearer performing the task with the head posture for that point, on the basis of the wearer, scene and task models, providing the task-directed performance parameter for determining to which extent the equipment is appropriate for the wearer.