Driver Looking-Away Detection Using Missing-Face Image Ratios
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Solution Overview
Problem
Existing looking away detection systems fail to determine if a driver is looking away during driving when a face is not visible in the captured image, leading to incomplete assessment of driving states.
Innovation Solution
A looking away determination device that assesses the proportion of images without a detected face based on driving state information, determining a looking away state when this proportion exceeds a predetermined value, and adjusts facial and line-of-sight direction condition ranges according to driving conditions such as turns and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If looking away detection is performed based on face detection in captured images, then detection accuracy is improved when face is visible, but detection cannot be performed at all when face does not appear in the captured image
Solution Approach 1:
The system changes the detection parameter from binary face detection to proportion-based assessment. By calculating the proportion of images without detected faces and comparing it against a predetermined threshold, the system adapts its detection criterion based on driving state information, enabling flexible detection across different driving conditions while maintaining accuracy.
2Ease of operation
If a fixed threshold is used for face detection proportion, then determination is simple, but it cannot adapt to different driving states such as turns and straight driving
Solution Approach 1:
The predetermined value for face detection proportion is made dynamic rather than fixed. The system adjusts this threshold based on driving state information (such as whether the vehicle is turning or driving straight), allowing the determination criterion to adapt automatically to different driving scenarios while maintaining operational simplicity through automated adjustment.
Data Source
AI summary
A looking away determination device includes: a determination unit that determines that a driver is in a looking away state when a proportion of an image in which a face of the driver is not detected with respect to a plurality of images obtained by imaging the driver is equal to or greater than a first predetermined value, the first predetermined value being determined based on driving state information that indicates a state during driving by the driver.