AR Display Parameter Selection for Object Distance
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Solution Overview
Problem
Existing head-mounted display devices face challenges in accurately superimposing augmented reality (AR) images onto real objects due to variations in the distance between the imaging section and the object, requiring improvements in parameter settings for precise image display.
Innovation Solution
A head-mounted display device equipped with a transparent image display section, an imaging section, a depth sensor, and a parameter selection system that derives object distance and pose, allowing for the selection of optimal parameter groups to accurately set the position, size, and depth perception of AR images relative to real objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed parameter set is used for displaying AR images, then the device complexity is reduced, but the display accuracy varies when object distance changes
Solution Approach 1:
The patent implements dynamic parameter selection by automatically choosing different parameter groups based on the detected object distance. The control unit switches between first parameter groups (for distant objects) and second parameter groups (for near objects), making the system adaptive to varying conditions rather than using fixed parameters.
Solution Approach 2:
The patent changes display parameters based on object distance thresholds. When the object distance exceeds a threshold, the first parameter group is selected; when it is within the threshold, the second parameter group is selected. This parameter switching mechanism optimizes display accuracy for different ranging scenarios.
2Measurement precision
If multiple parameter groups are prepared for different distances, then the display accuracy for various distances is improved, but the device complexity increases
Solution Approach 1:
The control unit automatically selects the appropriate parameter group based on the object distance detected by the depth sensor, without requiring manual intervention. The system serves itself by autonomously managing parameter selection, which reduces the operational complexity despite having multiple parameter groups.
Solution Approach 2:
The system uses feedback from the depth sensor to continuously monitor object distance and automatically adjust parameter selection. This closed-loop feedback mechanism ensures the correct parameter group is applied based on real-time distance information, improving accuracy while automating the complexity management.
3Measurement precision
If the imaging section is positioned closer to the object for better capture, then the image quality improves, but the field of view and depth perception are reduced
Solution Approach 1:
The patent changes the effective imaging parameters by selecting different parameter groups that account for the imaging section's position relative to the object. This allows the system to optimize both capture quality and field of view by adjusting display parameters based on the actual imaging geometry.
Solution Approach 2:
The parameter selection system acts as an intermediary that reconciles the conflict between close-range capture quality and wide field of view. By mediating through intelligent parameter selection, the system optimizes the trade-off between these two competing requirements.
Data Source
AI summary
A head-mounted display device includes a deriving section that derives an object distance of a real object included in an outside scene to be imaged and a relative pose of the real object with respect to an imaging section, a parameter selection section that selects one parameter group among a plurality of parameter groups for displaying an AR image associated with the real object on an image display section in accordance with the object distance; and a display image setting section that sets a display image in which a pose of the AR image and a pose of the real object are associated with each other, on the basis of the object distance, the relative pose of the real object, and the selected one parameter group, and displays the display image on the image display section.