Passenger State Detection Device Using Per-Item Image Correction
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Solution Overview
Problem
Conventional image correction technologies do not set specific correction parameters for each detection item in passenger state detection processes, leading to insufficient accuracy in multi-item detection processes.
Innovation Solution
A passenger state detection device that sets and applies correction parameters for captured images based on feature amounts in face and structure areas within the images, specifically for each detection item such as line of sight, mouth-opening degree, and face orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional image correction technology is used with a single correction parameter for all detection items, then the device complexity is reduced and ease of operation is improved, but the measurement precision and reliability of passenger state detection are insufficient
Solution Approach 1:
The patent segments the correction parameter management by creating separate correction parameters for each detection item (line of sight detection, mouth-opening degree detection, face orientation detection, complexion detection, eye-opening degree detection). This segmentation allows each detection item to have optimized correction parameters tailored to its specific requirements, thereby improving measurement precision without requiring a completely complex unified system.
Solution Approach 2:
The patent applies local quality by setting different correction parameters for different detection items based on their specific needs. Each detection item receives customized correction parameters rather than a universal correction, which improves the detection accuracy for each specific function while maintaining manageable system complexity through localized optimization.
2Reliability
If multiple correction parameters are set for each detection item, then the measurement precision and reliability are improved, but the device complexity and difficulty of parameter management increase
Solution Approach 1:
The patent achieves universality by having the correction parameter setting unit serve multiple detection items simultaneously. A single correction parameter setting unit generates correction parameters for all five detection items (line of sight, mouth-opening degree, face orientation, complexion, eye-opening degree), allowing the system to maintain high reliability across multiple functions without proportionally increasing overall system complexity.
Data Source
AI summary
A passenger state detection device (100) includes: a correction parameter setting unit (30) for setting a correction parameter for a captured image captured by a camera (2) for capturing a vehicle interior for each of detection items in passenger state detecting process including the multiple detection items using at least one of a feature amount in a face part area that corresponds to a passenger's face part in the captured image or a feature amount in a structure area that corresponds to a structure in the vehicle interior in the captured image; and an image correcting unit (40) for correcting the captured image for each of the detection items in the passenger state detecting process using the correction parameter set by the correction parameter setting unit (30).