Head-Mounted Marker Viewpoint Correction for Stable Stereoscopic Display
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Solution Overview
Problem
Existing stereoscopic display systems struggle to maintain stable video viewing when the user's head moves, causing discomfort and dizziness due to incorrect viewpoint positioning.
Innovation Solution
An image generation apparatus and method that uses a marker detection system to correct the viewpoint position based on two-dimensional coordinates of markers on a head fixture, generating parallax images from the corrected viewpoint without relying on Z-direction coordinates, allowing for stable stereoscopic video display even with head movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If viewpoint position is fixed without movement for stereoscopic display, then stereoscopic effect is achieved, but user comfort deteriorates when head moves slightly
Solution Approach 1:
The patent implements dynamic viewpoint position correction by continuously tracking marker coordinates on the user's head and adjusting the virtual viewpoint in real-time. The viewpoint position correction block dynamically updates the viewpoint based on detected marker positions, transforming the static viewpoint system into a dynamic one that adapts to user head movements, thereby resolving the contradiction between stereoscopic stability and viewing comfort
Solution Approach 2:
The system employs feedback mechanisms by detecting marker coordinates on the user's head and using this information to correct the viewpoint position. The detected two-dimensional coordinates of markers serve as feedback signals that trigger viewpoint adjustments, creating a closed-loop control system that maintains stereoscopic stability while accommodating natural head movements
2Measurement precision
If Z-direction coordinate of markers is used for viewpoint correction, then viewpoint accuracy is improved, but computational complexity and error propagation increase
Solution Approach 1:
The patent extracts only the necessary two-dimensional coordinates of markers from the full three-dimensional marker information. By taking out and using only the XY-plane coordinates for viewpoint correction while excluding the Z-direction coordinate, the system simplifies computation and reduces error propagation sources while maintaining sufficient viewpoint accuracy for stereoscopic display
Solution Approach 2:
The system uses simplified two-dimensional coordinate data instead of complex three-dimensional coordinate processing. This approach treats the coordinate information as a simplified, less complex data structure that is easier to process, reducing computational overhead and potential error sources while achieving the necessary viewpoint correction functionality
Data Source
AI summary
A marker detection block 20 scans a taken image of a plurality of markers of a fixture worn on the head of a user so as to detect a two-dimensional coordinate on the taken image of the plurality of markers. A viewpoint position correction block 30 corrects a viewpoint position of the user without use of a coordinate in a Z direction of the markers but by use of the detected two-dimensional coordinate of the plurality of markers. A stereoscopic image generation block 40 generates a parallax image obtained when a three-dimensional object is viewed from the corrected viewpoint position.