Remote assessment of physiological parameters by non-contact technologies to quantify and detect mental stress states

Abstract

We present and investigate, in the first part of this paper, a set of published works that may be employed to remotely quantify mental stress based on physiological signals by non-contact means. Several techniques can be used to this purpose, thermal imaging being currently the most advanced in our knowledge. Webcams correspond to a ubiquitous and to the most accessible techniques in the particular purpose of mental stress detection. After all these theoretical reminders, we present a pilot study based on a new framework that was developed to detect mental workload changes using video frames obtained from a low-cost webcam. To induce stress, we have employed a computerized Stroop color word test on twelve subjects. The results offer further support for the applicability of mental workload detection by remote and low-cost means, providing an alternative to conventional contact techniques.

Non-Contact Physiological Parameters Extraction Using Facial Video Considering Illumination, Motion, Movement and Vibration

“…8). To our knowledge, only a few attempts have been made to monitor non-contact HR using IR camera such as [26] and [12]. However, the correlation coefficient for their proposed method is unknown.…”

Cardiovascular assessment by imaging photoplethysmography – a review

“…Future perspectives: iPPG features many interesting applications, e.g. systems for stress recognition [93,219,221], monitoring during magnetic resonance imaging [222], monitoring anesthesia [178,223], neonatal monitoring [45,46] and driver monitoring [36]. Such exemplary applications underline the importance of HRV processing because the (mean) HR alone does not provide enough information for a meaningful monitoring in none of them.…”

EmoSense: Revealing True Emotions Through Microgestures

“…16 participants were recruited from various occupations for our experiments (Female: 8, Male: 8, and ages vary from 19 to 65 with the mean value 31.72 and the standard deviation (SD) 14.76), satisfying the participant criteria outlined in previous studies for emotion and stress analysis. [64][65][66][67] None of them have any mental, visual, or hearing disorders. Participation in this study is voluntary, and all the collected information/data is solely utilized for research purposes with the participants' consent.…”