Infrared thermography as an access pathway for individuals with severe motor impairments

Journal of NeuroEngineering and Rehabilitation, 2009 · DOI: 10.1186/1743-0003-6-11 · Published: April 16, 2009

Assistive Technology Rehabilitation Biomedical

Simple Explanation

This paper explores using infrared thermography as a way for people with severe motor impairments to interact with their environment. It suggests that temperature changes related to mouth movements can be detected. The study uses a thermal camera and a computer algorithm to detect mouth opening and closing based on temperature changes. The goal is to create a non-invasive access pathway that is not affected by lighting or skin color, offering more flexibility for users.

Study Duration

Not specified

Participants

10 (8 able-bodied, 2 with quadriplegia)

Evidence Level

Not specified

Key Findings

1
The study achieved high detection sensitivity and low error rates in detecting mouth opening and closing using infrared thermography.
2
The algorithm used was found to be robust against participant motion and changes in the background environment.
3
Infrared thermography can be used as a non-contact and non-invasive access pathway.

Research Summary

The study investigates infrared thermography as a non-invasive access pathway for individuals with motor impairments, focusing on detecting mouth opening and closing. A thermal camera and computerized algorithm were used to process thermographic videos, achieving high sensitivity and specificity in detecting mouth movements. The findings suggest that this approach is robust to environmental factors and user movements, warranting further research for practical applications.

Practical Implications

Alternative Access

Provides a new non-invasive, non-contact access method for individuals with motor impairments.

Environmental Robustness

Offers an access pathway that is less sensitive to lighting conditions and user movements compared to other vision-based systems.

Hygienic and Safe

Eliminates the need for sensor attachment, reducing hygiene concerns and risk of choking compared to sip and puff or EMG based switches.

Study Limitations

1
Infrared cameras are more expensive than conventional cameras.
2
Thermal image quality can be affected by ambient temperature, humidity, and air circulation.
3
Infrared cameras have relatively low resolution, making it difficult to discriminate fine facial features.

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