AR Optical Lens Distortion Correction via Coordinate Mapping
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Solution Overview
Problem
Current display technologies face challenges in effectively aligning and physicallyizing three-dimensional virtual content with physical scenes in augmented reality, particularly in achieving accurate stereoscopic displays due to optical distortions and coordinate system alignment issues.
Innovation Solution
A method and system for a terminal device that determines target space coordinates of a physical marker, converts them into rendering coordinates, acquires and renders virtual object data, and corrects optical distortions to project left-eye and right-eye display content onto optical lenses, ensuring alignment and undistorted stereoscopic display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If virtual content is displayed using optical lenses for stereoscopic display, then three-dimensional display effect is improved, but optical distortion causes misalignment with physical objects
Solution Approach 1:
The patent applies preliminary action by pre-distorting the virtual content in the opposite direction of the expected optical distortion before rendering. This pre-distortion compensates for the lens-induced distortion, ensuring that when the distorted virtual content is projected through the optical lenses, it aligns accurately with the physical scene. The conversion parameters are calculated in advance based on the optical distortion characteristics, allowing the virtual content to be pre-adjusted to counteract the upcoming distortion from the lenses.
2Measurement precision
If coordinate conversion is performed between physical space and virtual space, then alignment between virtual and physical objects is improved, but calculation complexity increases
Solution Approach 1:
The patent applies parameter changes by establishing a conversion parameter set that maps coordinates from the physical space coordinate system to the virtual space coordinate system. These conversion parameters include translation, rotation, and scaling factors that transform the coordinate representation. By changing the coordinate parameters through this conversion relationship, the system achieves accurate alignment between virtual and physical objects while managing computational complexity through optimized parameter calculations.
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 solution enables accurate alignment and stereoscopic display of virtual content with physical objects, correcting optical distortions to provide a seamless and undistorted virtual image alignment, enhancing the augmented reality experience.
Implementation Method 1
the first optical lens and the second optical lens respectively reflect the left-eye display content and the right-eye display content to a user's eyes
Data Source
AI summary
A three-dimensional display method is provided and comprises: acquiring target space coordinates of a target marker in a physical space; converting the target space coordinates into rendering coordinates in a virtual space; acquiring data of a virtual object to be displayed, and rendering, based on the data of the virtual object and the rendering coordinates, the virtual object to obtain a left-eye display content and a right-eye display content of the virtual object; and displaying the left-eye display content and the right-eye display content. The left-eye display content is projected onto a first optical lens, the right-eye display content is projected onto a second optical lens, and the first optical lens and the second optical lens respectively reflect the left-eye display content and the right-eye display content to human eyes. The method can achieve alignment display of the virtual object with the target marker, and a stereoscopic display.