Head-Mounted Display Image Cropping for Position Tracking
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Solution Overview
Problem
Existing head-mounted displays face challenges in accurately and efficiently recognizing the user's position and posture, as well as the surrounding environment, leading to increased manufacturing costs, weight, and power consumption due to the need for multiple sensors and equipment.
Innovation Solution
An information processing device and method that utilizes a head-mounted display with a stereo camera to capture real-time images, crops specific regions for analysis, and processes them to determine the user's position and posture, allowing for high-accuracy image display without requiring additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of sensors and equipment is increased to accurately recognize user position, posture, and surrounding environment, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The camera performs multiple functions: it captures images for display to the user, and simultaneously provides images for analysis to determine user position, posture, and surrounding environment. This multi-functional use of a single component eliminates the need for separate sensors, reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent combines the display function and the sensing function into a single camera system. The same camera that provides visual feedback to the user also serves as the sensing device for spatial recognition, merging multiple functions into one component to reduce overall system complexity.
2Measurement precision
If additional sensors and equipment are added to improve recognition accuracy, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The camera serves dual purposes as both a display device and a sensing device for environmental recognition. This eliminates the need for additional specialized sensors, thereby reducing component count and manufacturing cost while maintaining high recognition accuracy through image analysis.
3Measurement precision
If more sensors and equipment are used to increase information acquisition, then measurement precision is improved, but weight increases
Solution Approach 1:
The camera performs both display and sensing functions, eliminating the need for separate sensing components that would add weight. The same lightweight camera module provides both visual feedback to the user and spatial information for position and posture determination, reducing overall device weight.
4Measurement precision
If additional sensors and equipment are added to improve recognition accuracy, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The camera serves dual purposes as both display and sensing device, eliminating the need for additional powered sensors. By using the same camera for both functions, the system reduces the total power consumption while maintaining accurate position and posture tracking through image analysis.
Data Source
AI summary
An image generation device sequentially acquires a frame 150 of a moving image captured by a stereo camera included in a head-mounted display, and generates a display image 154 to be used for video see-through or the like. A crop section of the image generation device crops a region 152b in which a floor surface appears, and sets the cropped region as an image 156 for setting a play area in which the user is movable. In addition, the crop section crops a region 152c with a predetermined size in which the front of the head-mounted display appears, and sets the cropped region as an image 158 for acquiring state information regarding the head-mounted display.