VR Imaging Distortion Correction via Minimum Inscribed Circle
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Solution Overview
Problem
Virtual reality devices face challenges in achieving an immersive experience due to the need for adjusting imaging ratios to match screen sizes and lens parameters, which often result in image distortion and limited visual fields.
Innovation Solution
An imaging method and apparatus that calculates the radius of a minimum inscribed circle and uses a distortion formula to determine an enlargement ratio, allowing for image enlargement and distortion to optimize the imaging ratio for display on virtual reality devices, ensuring the image is presented within the maximum visible scope of the lens device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the image is enlarged to maximize the visual field, then the visible scope increases, but image distortion occurs
Solution Approach 1:
The patent applies preliminary distortion correction to the image before it is displayed on the screen. By pre-calculating and applying the inverse distortion based on the lens parameters and screen geometry, the image is prepared in advance so that when viewed through the lens, the distortion is compensated and the final visual output appears undistorted while maximizing the visual field.
Solution Approach 2:
The patent changes the distortion parameters of the image based on the specific lens parameters (focal length, field of view) and screen characteristics. By dynamically adjusting the distortion correction parameters according to the minimum inscribed circle radius and lens properties, the system optimizes the balance between visual field size and image quality for different VR device configurations.
2Manufacturing precision
If the imaging ratio is adjusted to match screen size and lens parameters, then the image fits the display area, but the visual field is limited
Solution Approach 1:
The patent calculates the appropriate imaging ratio in advance based on the screen dimensions and lens parameters, specifically using the minimum inscribed circle radius. The image is pre-scaled and pre-distorted according to this calculated ratio, allowing the full screen area to be utilized while maintaining proper geometric relationships that maximize the effective visual field when viewed through the lens.
3Manufacturing precision
If distortion correction is applied to maintain image quality, then image fidelity improves, but the processing complexity increases
Solution Approach 1:
The patent simplifies the distortion correction process by parameterizing it based on easily measurable geometric properties (minimum inscribed circle radius, screen dimensions, lens focal length). Instead of complex pixel-by-pixel analysis, the system uses closed-form mathematical relationships that transform the image based on these parameters, significantly reducing computational complexity while maintaining high image quality.
Data Source
AI summary
An imaging method for a virtual reality device, and a virtual reality device are provided. The method comprises: acquiring an image; calculating the radius of a minimum inscribed circle of the image; calculating a distortion ratio at the minimum inscribed circle according to the radius and a selected distortion formula; enlarging the image by using the calculated distortion ratio as an enlargement ratio; distorting the enlarged image according to the distortion formula; and outputting the distortion processed image to a screen for displaying.