Gaze Calibration Using Continuous Trajectory Viewpoint Detection

Solution Overview

Problem

Conventional gaze detection systems require lengthy and burdensome calibration processes due to potential signal loss from blinking or noise, leading to inaccurate and time-consuming calibration operations.

Innovation Solution

A gaze detection apparatus with an indicator presenting unit that moves continuously along a predetermined trajectory, combined with a gaze detecting unit and a numerical optimization problem solver to convert detected gaze points into a corrected set that aligns with the trajectory, using optimization algorithms to minimize distance and account for latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple indicators are presented sequentially for calibration, then calibration coverage is improved, but calibration time increases and detection reliability decreases due to blinking or noise

Engineering Contradiction:

Improvecalibration accuracyVSAvoidcalibration time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The indicator moves continuously along a predetermined trajectory rather than appearing at discrete locations. This continuous movement ensures that the indicator is always visible and detectable, eliminating gaps caused by blinking or noise between sequential presentations. The gaze detection system continuously captures gaze points along the trajectory, ensuring uninterrupted calibration data collection.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The indicator's trajectory and movement path are pre-defined before the calibration process begins. This preliminary setup ensures that the indicator will pass through all necessary calibration locations in a predetermined sequence, guaranteeing complete calibration coverage without requiring repeated attempts or extended time.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If sequential indicator presentation is used, then calibration simplicity is maintained, but detection reliability decreases due to blinking or noise causing signal loss

Engineering Contradiction:

Improvecalibration operation simplicityVSAvoiddetection signal reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The indicator moves continuously along a predetermined trajectory rather than appearing at discrete locations. This continuous movement ensures that the indicator is always visible and detectable, eliminating gaps caused by blinking or noise between sequential presentations. The gaze detection system continuously captures gaze points along the trajectory, ensuring uninterrupted calibration data collection.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The predetermined trajectory acts as an intermediary framework that guides the indicator through all necessary calibration positions. This trajectory serves as a reliable reference that ensures the indicator passes through all required locations, maintaining detection reliability while keeping the calibration process simple for the user.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If repeated detection operations are performed due to signal loss, then calibration accuracy is maintained, but calibration time increases and user burden increases

Engineering Contradiction:

Improvecalibration accuracyVSAvoidcalibration efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The indicator moves continuously along a predetermined trajectory rather than appearing at discrete locations. This continuous movement ensures that the indicator is always visible and detectable, eliminating gaps caused by blinking or noise between sequential presentations. The gaze detection system continuously captures gaze points along the trajectory, ensuring uninterrupted calibration data collection.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The indicator's trajectory and movement path are pre-defined before the calibration process begins. This preliminary setup ensures that the indicator will pass through all necessary calibration locations in a predetermined sequence, guaranteeing complete calibration coverage without requiring repeated attempts or extended time.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12517577B2Viewpoint detection device, calibration method, and program

Publication Date: 2026.01.06 FOVE INC

AI summary

[Technical Problem] To perform calibration operations accurately and quickly.[Solution to Problem] A gaze detection apparatus comprises an indicator presenting unit that presents an indicator to eyes and continuously moves the indicator in accordance with a predetermined trajectory; a gaze detecting unit that detects a gaze point of the eyes; and a numerical optimization problem solving unit that solves a numerical optimization problem in order to find a correction that converts a first set of detected plurality of the gaze points into a second set that satisfies a particular condition with respect to the predetermined trajectory.