Head-Mounted Thermal Camera Array for Continuous Facial Monitoring
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Solution Overview
Problem
Current methods for monitoring facial temperatures to determine physiological responses, such as stress or allergic reactions, are hindered by the use of bulky thermal cameras that require complex image analysis and are difficult to maintain during daily activities.
Innovation Solution
A head-mounted system with multiple lightweight thermal cameras positioned strategically around the face, allowing for continuous thermal measurement of specific regions of interest without occlusion, using uncooled thermal sensors and machine learning-based models to analyze temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional thermal cameras are used to monitor facial temperatures, then measurement capability is achieved, but device bulk and complexity increase
Solution Approach 1:
The patent divides the facial monitoring task into multiple specialized thermal cameras, each dedicated to capturing thermal data from specific facial regions (forehead, cheeks, nose, lips). This segmentation allows each camera to be optimized for its specific region, reducing the need for a single large, complex camera system while maintaining comprehensive measurement capability.
Solution Approach 2:
The patent transitions from a single-point or limited-area temperature measurement approach to a multi-dimensional distributed measurement system. By placing multiple lightweight thermal cameras at different spatial positions around the face, the system captures thermal data across multiple dimensions and regions simultaneously, achieving comprehensive monitoring without requiring one large complex camera.
2Measurement precision
If complex image analysis procedures are used to track and register facial movements, then measurement accuracy is maintained, but processing complexity and time increase
Solution Approach 1:
The patent implements preliminary spatial configuration and calibration of multiple thermal cameras to their specific facial regions before actual monitoring begins. Each camera is pre-positioned and calibrated to capture thermal data from its designated region, establishing a baseline spatial mapping that simplifies subsequent measurement processing and reduces the need for complex real-time image analysis.
Solution Approach 2:
The distributed camera system automatically captures thermal data from multiple facial regions simultaneously, with each camera independently monitoring its assigned region. This self-service approach eliminates the need for complex centralized image processing and face tracking algorithms, as the system naturally maintains measurement capability through its distributed architecture.
3Area of stationary object
If a single thermal camera is used to cover the entire face, then device simplicity is maintained, but measurement coverage and detail are reduced
Solution Approach 1:
The patent segments the facial monitoring task into multiple specialized thermal cameras, each dedicated to capturing thermal data from specific facial regions (forehead, cheeks, nose, lips). This segmentation allows each camera to be optimized for its specific region, reducing the need for a single large, complex camera system while maintaining comprehensive measurement capability.
Solution Approach 2:
The patent combines multiple lightweight thermal cameras into a coordinated monitoring system that collectively covers the entire face. By merging the capabilities of several small cameras positioned at different locations, the system achieves comprehensive facial region coverage that would be difficult to obtain with a single camera, while keeping individual device complexity low.
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 accurate and continuous monitoring of facial temperature changes, improving the detection of physiological responses like stress and allergic reactions, even during head movements, with reduced bulk and increased comfort.
Implementation Method 1
first, second, third, and fourth thermal cameras... configured to take thermal measurements of a first region of interest (THROI1), where ROI1 covers a portion of the right side of the user's forehead
Data Source
AI summary
This disclosure describes various systems for collecting thermal measurements of regions of a user's face. Each of the systems includes a frame configured to be worn on the user's head, and one or more lightweight thermal cameras that are coupled to the frame and configured to take thermal measurements of a region of interest on the user's face. Due to their coupling to the frame, the thermal cameras remain pointed at their respective regions of interest even when the user's head performs angular movements. The thermal measurements collected by some embodiments of the systems described herein may be utilized for a variety of applications that involve detecting different types of physiological responses or medical disorders.