Eyeball Position Detection for Display Alignment
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Solution Overview
Problem
Users cannot clearly view images on display surfaces when their eyeball position diverges from the optical axis of imaging devices or wearable terminals, leading to inaccurate line-of-sight detection.
Innovation Solution
An information processing apparatus that detects the user's eyeball position and provides operation instructions to adjust the device, ensuring the eyeball is aligned with the visual field center of the display surface, using methods like the pupil-corneal reflection method to compute the optical axis vector and estimate the eyeball position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the user's eyeball position is divergent from the optical axis, then the device can be used without adjustment, but the user cannot clearly view the image and line-of-sight detection becomes inaccurate
Solution Approach 1:
The system performs preliminary detection of the user's eyeball position before main operation. By detecting the eyeball position in advance and providing alignment instructions, the system prepares the user for proper device usage, ensuring accurate line-of-sight detection from the start
Solution Approach 2:
The system provides real-time feedback to the user about their eyeball position relative to the optical axis. Through display units, the system shows alignment instructions and guides the user to adjust their position, creating a closed-loop control system that improves measurement accuracy
2Reliability
If the eyeball position is not aligned with the visual field center, then no adjustment is needed, but the user cannot clearly look at the displayed image
Solution Approach 1:
The system enables the user to self-adjust their eyeball position by providing clear visual feedback and alignment instructions. The user independently aligns themselves with the optical axis based on the system's guidance, eliminating the need for complex mechanical adjustment mechanisms
Solution Approach 2:
The patent replaces mechanical alignment adjustment mechanisms with an optical detection and visual feedback system. Instead of moving parts to physically align the device, the system uses light-based eyeball detection and displays alignment information to the user, substituting mechanical complexity with optical and information processing solutions
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
This solution improves line-of-sight detection accuracy and allows users to clearly view images by aligning the eyeball with the visual field center, enhancing the operational effectiveness of imaging devices and wearable terminals.
Implementation Method 1
detects the user's line of sight with respect to a display surface displaying a through-the-lens image by capturing the reflected light from the eyeball
Implementation Method 2
radiates light in the infrared band (infrared light) onto the eyeball of a user
Data Source
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AI summary
[Object] To provide an information processing apparatus that can adjust a position of a device to make an eyeball position of a user agree with a visual field center of a display surface. [Solution] There is provided an information processing apparatus including: an eyeball position estimation unit configured to estimate an eyeball position of a user in a pupil-corneal reflection method on the basis of a captured image including an eye of the user captured when the eye of the user looking at a display surface is irradiated with light; a discrepancy estimation unit configured to estimate an amount of discrepancy between an eyeball position on the display surface and a visual field center of the display surface, the eyeball position being identified on the basis of the eyeball position; and an operation instruction unit configured to issue an operation instruction to adjust a position of a device including the display surface on the basis of the estimated amount of discrepancy.