3D Display Parallax Correction for Moving Viewpoints
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Solution Overview
Problem
Existing stereoscopic image display devices fail to maintain depth perception when the viewer's viewpoint moves, leading to loss of the 3D world view due to unaddressed motion parallax, which is not handled by mere methods of presenting parallax images from a fixed position.
Innovation Solution
An image display device that tracks the user's viewpoint using a camera to detect face and eye positions, corrects stereoscopic images for motion parallax in real-time, and adjusts the parallax barrier accordingly to maintain a stereoscopic view, returning to the original image when the viewpoint stabilizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stereoscopic images are presented from a fixed position, then image stability is maintained, but depth perception is lost when the viewer's viewpoint moves
Solution Approach 1:
The system continuously tracks the viewer's face and eye positions using a camera, detects viewpoint movement, and dynamically adjusts the parallax barrier and image content in real-time based on this feedback to maintain correct stereoscopic viewing from moving viewpoints
Solution Approach 2:
The patent transitions from a static fixed-viewpoint stereoscopic display to a dynamic system that adapts to the viewer's moving viewpoint by adjusting the parallax barrier position and image content based on real-time eye tracking data
2Reliability
If the parallax barrier is adjusted in real-time to track viewpoint movement, then depth perception is maintained, but image stability deteriorates
Solution Approach 1:
The system dynamically adjusts the parallax barrier and image content in real-time based on detected viewpoint movement, allowing the display to adapt to changing viewing conditions while maintaining stereoscopic correctness
Solution Approach 2:
The system performs preliminary detection of viewpoint movement and pre-adjusts the parallax barrier and image content to compensate for the movement, ensuring continuous depth perception without noticeable disruption to the viewer
3Reliability
If viewpoint tracking and correction is implemented, then motion parallax is addressed, but device complexity increases
Solution Approach 1:
The patent introduces a camera-based eye tracking system as an intermediary to detect viewpoint position, which then controls the parallax barrier and image processing, serving as a mediator between the viewer's natural head movement and the stereoscopic display system
Solution Approach 2:
The system uses real-time feedback from eye position detection to dynamically control the parallax barrier and image content, creating a closed-loop control system that automatically maintains correct stereoscopic viewing
Data Source
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AI summary
An eye-point detection unit (26) tracks the eye-points of a user after detecting the user who views a three-dimensional image including left-eye and right-eye parallax images obtained when a subject is viewed by the user from a given position established as a view reference position. When the movement speed of the eye-points becomes equal to or greater than a predetermined magnitude, a dynamic parallax correction unit (30) determines, on the basis of the movement amounts of the eye-points, dynamic parallax correction amounts for the respective left-eye and right-eye parallax images, thereby generating and outputting a three-dimensional image as dynamic parallax corrected to a display unit (36). When the movement speed of the eye-points becomes less than the predetermined magnitude, the dynamic parallax correction unit (30) stepwise reduces the correction amount of the dynamic parallax correction until the left-eye and right-eye parallax images return to the respective parallax images obtained when the subject is viewed from the view reference position, thereby generating and outputting a three-dimensional image to the display unit (36).