Gaze Detection Dynamic Head Orientation Correction
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Solution Overview
Problem
The accuracy of line-of-sight detection in gaze detection apparatuses is reduced due to changes in the user's use state, such as varying head orientations and device mounting states, which are not considered in existing techniques.
Innovation Solution
A gaze detection apparatus with a processor and memory that includes a gaze detection unit, orientation detection unit, calibration unit, and correction unit to detect gaze positions and head orientations, and corrects detection errors using calibration values based on current gaze and head orientation information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed to improve line-of-sight detection accuracy, then measurement precision is improved, but the system cannot adapt when head orientation or use state changes
Solution Approach 1:
The patent implements dynamic correction by continuously tracking head orientation changes and adjusting the correction value accordingly. The system transitions from static calibration to dynamic adaptation by detecting current head orientation and calculating corrected gaze positions that compensate for orientation changes, thereby maintaining detection accuracy across varying use states.
Solution Approach 2:
The system employs feedback mechanisms by detecting current head orientation and using this information to adjust the correction value. The corrected gaze position is calculated based on the relationship between current and calibration head orientations, creating a closed-loop system that continuously adapts to maintain accuracy.
2Measurement precision
If the user maintains a constant use state to ensure detection accuracy, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs self-correction by automatically detecting head orientation changes and adjusting the correction value without requiring user intervention. The apparatus autonomously adapts to different use states by calculating corrected gaze positions based on detected orientation changes, freeing the user from the constraint of maintaining constant posture.
3Measurement precision
If calibration is performed for each head orientation to maintain accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter approach by using continuous head orientation detection to dynamically adjust a single correction value, rather than requiring separate calibration data for each orientation. This parameter-based adaptation method maintains accuracy across orientations while avoiding the complexity of multiple calibration sets.
Data Source
AI summary
A gaze detection apparatus includes at least one memory and at least one processor which function as: a gaze detection unit configured to detect, based on an eye image in which an eye of a user is imaged, a gaze position which is a position at which the user looks; an orientation detection unit configured to detect a head orientation which is an orientation of a head of the user, based on the eye image; a calibration unit configured to acquire a first correction value for reducing a detection error of the gaze position by a predetermined calibration operation; and a correction unit configured to correct the first correction value, based on gaze information related to a current gaze position, a head orientation during the predetermined calibration operation, and a current head orientation.