AR Glasses Display Control for Camera-Eye Parallax Alignment
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Solution Overview
Problem
In augmented reality devices, parallax between the user's eye and the camera causes a deviation between the real image and the captured image, leading to a sense of incongruity for the user.
Innovation Solution
A processor determines a range and size for cutting out a partial image based on the subject distance and parallax between the user's eye and the camera, displaying the partial image to align with the real image using augmented reality glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the camera is positioned separately from the user's eye in augmented reality glasses, then the device structure is simplified and manufacturing is easier, but parallax occurs causing deviation between the real image and captured image
Solution Approach 1:
The patent applies preliminary action by pre-calculating the parallax offset between the camera and user's eye position, and pre-processing the captured image through image processing (shifting, scaling, or cropping) before display. This allows the system to compensate for the fixed physical separation between camera and eye, eliminating the need to reposition the camera while maintaining accurate image alignment with the real world.
2Device complexity
If the camera position is fixed relative to the glasses frame, then device complexity is reduced, but the parallax between camera and eye cannot be adjusted
Solution Approach 1:
The patent applies parameter changes by modifying image processing parameters (shift amount, scale factor, crop region) based on the fixed physical parameters of the device (camera-to-eye distance, focal length). The system calculates optimal image transformation parameters to compensate for the fixed camera position, allowing adaptability in image presentation without mechanical adjustment of the camera itself.
3Manufacturing precision
If image processing is performed to correct parallax, then image alignment accuracy is improved, but processing time and computational resources increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating the image processing parameters (transformation matrix, crop coordinates) based on the fixed geometric relationship between camera and eye. These parameters are determined in advance and stored, allowing rapid application of the same transformation to each captured image without real-time complex calculations, thus reducing processing time while maintaining alignment accuracy.
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
Suppresses the deviation between the real image and the captured image, ensuring a consistent visual experience for the user by aligning the positions of the real and captured images.
Implementation Method 1
the parallax is a parallax between the eye of the user that visually recognizes the real space and the camera
Data Source
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AI summary
A processor (41), which is included in a glasses-type display device (10) that allows at least one eye of a user to visually recognize a real space and that displays a captured image (60) obtained by imaging the real space with a camera (25), performs display processing of displaying a partial image (64), which is a partial region of the captured image captured by the camera, in a manner visually recognizable by the user based on a parallax between the eye of the user and the camera.