Driver Inattentiveness Detection Using Gaze and Face Direction
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Solution Overview
Problem
Existing inattentiveness determination technologies inaccurately assess driver inattentiveness by relying solely on face direction, leading to false positives when gaze direction is not considered.
Innovation Solution
An inattentiveness determination device and system that acquires a photographed image of a driver, detects gaze direction, and determines inattentiveness based on a predetermined gaze range related to the moving object's direction. If the gaze direction cannot be detected, it assesses inattentiveness using the driver's face direction within a predetermined range relative to the moving object's direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inattentiveness is determined based on face direction, then the determination can be made even when gaze direction cannot be detected, but false positives occur when the gaze direction is actually within the acceptable range
Solution Approach 1:
The system performs preliminary gaze direction detection before falling back to face direction determination. By establishing a hierarchy where gaze detection is attempted first and face direction is used only as a backup when gaze cannot be detected, the system ensures that the more accurate gaze-based determination is prioritized while maintaining reliability through the face direction fallback mechanism
Solution Approach 2:
The system applies different determination methods to different conditions: when gaze direction can be detected, it uses the precise gaze-based determination; when gaze cannot be detected, it switches to face direction-based determination. This localized application of different methods based on detection capability resolves the contradiction by matching the determination method to the available information quality
2Ease of operation
If a fixed predetermined range is used for gaze direction, then the determination process is simple, but it cannot adapt to varying vehicle speeds where different ranges are appropriate
Solution Approach 1:
The system dynamically adjusts the predetermined gaze range based on vehicle speed. When the vehicle is stationary or moving slowly, a wider range is applied; when moving at higher speeds, a narrower range is used. This dynamic adaptation allows the system to maintain accuracy across different operating conditions while keeping the determination logic relatively simple through predefined speed-based ranges
Solution Approach 2:
The system changes the parameter of the predetermined range based on vehicle speed. By linking the range parameter to the vehicle's speed state, the system achieves adaptability to different driving conditions without requiring complex real-time adjustment mechanisms, thus maintaining operational simplicity while improving versatility
Data Source
AI summary
An inattentiveness determination device includes a photographed image acquisition means configured to acquire a photographed image of a driver driving a moving object, a first inattentiveness determination means which detects a gaze direction of the driver according to the photographed image, and determine whether or not the driver is in an inattentiveness state on a basis of a predetermined gaze range based on a moving direction of the moving object and the gaze direction, and a second inattentiveness determination means configured to, if the gaze direction cannot be detected, determine whether or not the driver is in the inattentiveness state on a basis of a face direction of the driver and a predetermined range of the face direction based on the moving direction of the moving object.