AR Display Light Attenuation Compensation for Realistic Dark Rendering
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Solution Overview
Problem
Augmented reality (AR) devices struggle to accurately express dark colors and shadows due to light attenuation caused by display areas, leading to unrealistic virtual images.
Innovation Solution
A processor-implemented method and apparatus that determines a compensation parameter to counteract light attenuation by generating a background image without attenuation, synthesizing it with a virtual object image to overlay on the target scene, and adjusting the display image to compensate for light loss, thereby enhancing the realism of dark colors and shadows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light attenuation is compensated by reducing brightness of the background image, then dark colors and shadows are realistically rendered, but the overall brightness of the display image decreases
Solution Approach 1:
The patent applies different brightness adjustment strategies to different regions of the display image. Specifically, the compensation parameter is calculated based on the degree of light attenuation, and this parameter is applied selectively to preserve dark colors and shadows in regions where they are needed while maintaining overall brightness in other regions. This local differentiation resolves the contradiction between realistic dark color rendering and overall image brightness.
2Measurement precision
If the compensation parameter is increased to counteract light attenuation, then the accuracy of visual information is improved, but the natural appearance of the target scene is distorted
Solution Approach 1:
The patent dynamically adjusts the compensation parameter based on the degree of light attenuation detected in different regions of the display image. Rather than applying a fixed compensation value, the system calculates and applies varying compensation parameters that are proportional to the actual light attenuation experienced. This parameter adjustment strategy ensures accurate visual information representation while preserving the natural appearance of the target scene.
3Area of stationary object
If the display area is made larger to provide more visual information, then the field of view is improved, but light attenuation increases causing darker and less realistic images
Solution Approach 1:
The patent applies brightness compensation before final image display to counteract the light attenuation that will occur when light passes through the display area. By calculating the compensation parameter based on the expected light attenuation and pre-adjusting the background image brightness, the system compensates for the reduced light transmission. This allows larger display areas to be used while maintaining image brightness and realism through the compensation mechanism.
Data Source
AI summary
A method and apparatus for processing augmented reality (AR) including determining a compensation parameter to compensate for light attenuation of visual information caused by a display area of an AR device as the visual information corresponding to a target scene is displayed through the display area, generating a background image without the light attenuation by capturing the target scene using a camera of the AR device, generating a compensation image by reducing brightness of the background image using the compensation parameter, generating a virtual object image to be overlaid on the target scene, generating a display image by synthesizing the compensation image and the virtual object image, and displaying the display image in the display area.