Gaze Point Detection for Cognitive Impairment Evaluation
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Solution Overview
Problem
Existing methods for evaluating cognitive impairment and brain impairment, such as those involving touch panels, face challenges in ensuring high accuracy due to difficulties in verifying contingency and ensuring precise subject interaction.
Innovation Solution
An evaluation apparatus and method that utilizes a display screen to detect a subject's gaze point, sets task and instruction regions, and calculates movement course data to assess cognitive impairment and brain impairment with high accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a touch panel is used for subject interaction, then the evaluation can be performed, but the verification of contingency is difficult and evaluation accuracy is reduced
Solution Approach 1:
The patent replaces the mechanical touch panel interaction system with an optical eye-tracking system. Instead of relying on physical touch inputs that are difficult to verify for contingency, the system uses eye gaze detection to automatically determine subject attention and interaction intent, thereby improving both evaluation accuracy and reliability of contingency verification.
Solution Approach 2:
The patent introduces an intermediary eye-tracking detection system between the subject and the evaluation task. This intermediary automatically captures and analyzes eye gaze patterns to determine subject attention and interaction behavior, eliminating the need for direct touch panel verification and improving the reliability of contingency assessment.
2Measurement precision
If eye gaze tracking is used to detect subject attention, then evaluation accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent makes the eye-tracking system serve multiple functions: detecting subject attention, determining interaction intent, and providing evaluation data. By consolidating these functions into a single eye-tracking-based system, the patent improves evaluation accuracy while managing device complexity through multi-functional integration rather than adding separate systems for each function.
Data Source
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AI summary
An evaluation apparatus includes a display screen that displays an image; a gaze point detection unit that detects a position of a gaze point of a subject who observes the display screen, a display control unit that performs instruction display operation of displaying, on the display screen, a task target object to be gazed at by the subject and instruction information for instructing the subject to solve a task related to the task target object, a region setting unit that sets, on the display screen, a task region corresponding to the task target object and an instruction region corresponding to the instruction information, a determination unit that determines whether the gaze point is present in the task region and the instruction region during an instruction display period in which the instruction display operation is performed on the basis of positional data of the gaze point, an arithmetic unit that calculates instruction movement course data indicating a course of movement of the gaze point during the instruction display period on the basis of a determination result, and an evaluation unit that obtains evaluation data of the subject on the basis of the instruction movement course data.