Head-Mounted Thermal Camera for Stress Detection
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Solution Overview
Problem
Current systems for monitoring stress levels are hindered by the difficulty in collecting thermal measurements from various regions of the human face, especially due to bulky equipment and complex image analysis requirements, making it challenging to detect stress effectively in daily activities.
Innovation Solution
A head-mounted thermal camera system that includes inward-facing cameras positioned close to the face to monitor thermal changes in specific regions, such as the periorbital area, coupled with a computer to detect stress levels and identify potential stressors by analyzing thermal measurements over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thermal cameras are used to collect thermal measurements from various regions of the human face, then stress detection capability is improved, but device complexity and bulkiness increase
Solution Approach 1:
The system divides the face into multiple regions of interest (ROIs) including periorbital areas, forehead, cheeks, and nose, with each region monitored by dedicated thermal sensors. This segmentation allows comprehensive stress detection across different facial zones while using simpler, distributed sensing elements rather than a single complex camera system
Solution Approach 2:
The patent introduces a processor as an intermediary component that receives thermal measurements from multiple distributed sensors and performs image processing to detect stress indicators. This intermediary handles the complexity of data fusion and analysis, allowing the sensing elements themselves to remain relatively simple while achieving sophisticated stress detection capabilities
2Measurement precision
If thermal cameras are continuously pointed at a person's face to collect data, then stress monitoring accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The system merges multiple functional components into a single head-mounted unit that includes thermal sensors, processors, and display elements integrated together. This unified device automatically performs all operations including thermal measurement, image processing, stress detection, and feedback display, eliminating the need for separate equipment and complex manual operations
Solution Approach 2:
The head-mounted system operates autonomously by automatically capturing thermal measurements from multiple facial regions, processing the data through onboard processors, detecting stress indicators, and providing real-time feedback to the user. The system serves itself by performing all necessary operations without requiring external equipment or complex user intervention
3Measurement precision
If complex image analysis procedures such as image registration and face tracking are performed, then measurement precision is improved, but device complexity and processing requirements increase
Solution Approach 1:
The system performs preliminary actions by pre-defining multiple regions of interest (ROIs) on the face before measurement begins. These ROIs include periorbital areas, forehead, cheeks, and nose, which are predetermined based on anatomical landmarks. This preliminary segmentation simplifies subsequent image processing by focusing analysis on specific predefined regions rather than requiring complex real-time face tracking and registration procedures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective detection of stress levels and identification of actual stressors by continuously monitoring thermal changes, providing personalized insights to manage stress effectively in daily life.
Implementation Method 1
an inward-facing head-mounted thermal camera (CAM) takes thermal measurements of a region on a periorbital area (THROI1) of the user
Data Source
AI summary
Described herein are systems and methods for selecting a stressor based on thermal measurements. In one embodiment, a system includes an inward-facing head-mounted thermal camera (CAM) and a computer. CAM takes thermal measurements of a region on a periorbital area (THROI1) of the user. The computer detects extents of stress based on THROI1, receives indications of potential stressors to which the user was exposed while THROI1 were taken, and selects the stressor, from among the potential stressors, based on the indications and the extents. Optionally, during most of the time the user was affected by the stressor, the effect of the stressor, as manifested via changes to THROI1, was higher than the effects of most of the potential stressors. Optionally, thermal measurements of other regions on the face may also be utilized to detect the extents of stress.