Abstract
Stress is a normal reaction of the human organism which triggered in situations that require a certain level of activation. This reaction has both positive and negative effects on everyone’s life. Therefore, stress management is of vital importance in maintaining the psychological balance of a person. Thermal-based imaging technique is becoming popular among researchers due to its non-contact conductive nature. Moreover, thermal-based imaging has shown promising results in detecting stress in a non-contact and non-invasive manner. Compared to other non-contact stress detection methods such as pupil dilation, keystroke behavior, social media interaction and voice modulation, thermal-based imaging provides better features with clear boundaries and requires no heavy methodology. This paper presented a brief review of previous work on thermal imaging related stress detection in humans. This paper also presented the stages of stress detection based on thermal face signatures such as dataset type, thermal image face detection, feature descriptors and classification performance comparisons are presented. This paper can help future researchers to understand stress detection based on thermal imaging by presenting the popular methods previous researchers use for stress detection based on thermal images.
Highlights
The word “stress” is described in many contexts [1]
This paper aimed to review the studies on stress detection based on thermal imaging
Many studies that established the thermal feature can be useful for detecting stress remotely
Summary
The word “stress” is described in many contexts [1]. An inclusive definition of stress refers to the biological response to a physiological or psychological stimulus [2]. Emotional and physical stressors can be detrimental to the human body. The effects of stress on human wellbeing and symptoms have been extensively researched in recent times [3–9]. Kim [10] found that people in their 30 s experience the highest stress level due to mask-wearing. The authors reveal that the early stress detection techniques depend on psychological questionnaires [11] and consultations [12]
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