Autostereoscopic Display Distortion Correction via Eye Tracking
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Solution Overview
Problem
Autostereoscopic displays suffer from distortion and displacement of three-dimensional images when viewed from angles not close to the normal, affecting the look-around effect and interaction with virtual objects.
Innovation Solution
A method and device that utilize an eye tracking system and a display portion with a transparent plate to cancel perceived distortion and displacement by adjusting pixel outputs based on the viewer's position and the refraction properties of the transparent plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent plate with parallax barrier or lenticular lens is used to enable autostereoscopic display, then three-dimensional images can be displayed without dedicated eyewear, but distortion and displacement of the images occur when viewed from angles not close to the normal
Solution Approach 1:
The system applies preliminary correction to the displayed image by calculating and compensating for the expected distortion and displacement caused by the transparent plate's refraction. The eye tracking system predicts the viewer's position and pre-adjusts the image rendering to counteract the optical distortion that will occur, thereby maintaining image position accuracy across different viewing angles.
Solution Approach 2:
The system dynamically changes rendering parameters based on the viewer's eye position detected by the eye tracking system. By adjusting parameters such as image position, size, and distortion correction factors in real-time according to the viewer's viewing angle, the system maintains accurate image presentation despite the optical properties of the transparent plate.
2Adaptability or versatility
If the viewer interacts with virtual objects at oblique viewing angles, then the viewer can observe the three-dimensional object from different perspectives, but the interaction does not occur at the expected time and place due to image distortion
Solution Approach 1:
The system uses feedback from the eye tracking system to continuously monitor the viewer's eye position and adjust the image rendering accordingly. This closed-loop feedback mechanism ensures that the displayed image position and the actual interaction target position remain aligned, allowing accurate interaction with virtual objects even when the viewer moves to different viewing angles.
Solution Approach 2:
The system makes the image rendering dynamic by continuously adapting the distortion correction and position adjustment based on the real-time eye position data. This dynamic adjustment ensures that the virtual objects maintain their correct positions and that interactions occur at the expected locations regardless of the viewer's viewing angle.
3Ease of operation
If the three-dimensional image is displayed using conventional weaving methods, then the left and right images can be directed to the respective eyes, but the image appears distorted and displaced when viewed from oblique angles
Solution Approach 1:
The system performs preliminary distortion correction on the image data before it is displayed through the transparent plate. By pre-calculating and applying the inverse of the expected refraction distortion based on the eye tracking data, the image geometry is corrected in advance, so that when viewed through the transparent plate, the image appears undistorted and correctly positioned.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly improves the rendering of three-dimensional images by reducing or eliminating distortion and displacement, enhancing the look-around effect and interaction accuracy with virtual content.
Implementation Method 1
a transparent plate, which has light refraction properties that cause the viewer to perceive distortion and/or displacement of a three-dimensional image that is displayed by the display device
Data Source
AI summary
The invention relates to a method for cancelling distortion and displacement of a three-dimensional image perceived by a viewer of an autostereoscopic display device, wherein the cancelling is performed by taking into account 1) the refraction properties of the display device; 2) the position of each pixel in the display device; and 3) the viewing position of the eyes of the viewer. In this way, the viewer can have a more realistic perception of three-dimensional virtual content. This includes e.g. an improved look-around effect for the viewer and an improved interaction of the viewer with the displayed three-dimensional virtual content. Preferably, the cancelling of the distortion and/or displacement is performed by using a refraction model for the display device.