ArXiv Preprint
The objective of the work was to realize a preliminary study of
proof-of-concept to evaluate emotions using thermographic images and blood
perfusion algorithm; the images were obtained for baseline and positive and
negative valence according to the protocol of the Geneva Affective Picture
Database. The blood perfusion algorithm is based on the heat transport
equation. The average temperature and blood perfusion in forehead, periorbital
eyes, cheeks, nose and upper lips were determined. Absolute and percentage
differences between the valences and the baseline were calculated. For negative
valence, a decrease in temperature and blood perfusion was observed in the
ROIs, and the effect was greater on the left side than on the right side. In
positive valence, the temperature and blood perfusion increased in some cases,
showing a complex pattern. The temperature and perfusion of the nose was
reduced for both valences, which is indicative of the arousal dimension. The
blood perfusion images were found to be greater contrast; the percentage
differences in the blood perfusion images are greater than those obtained in
thermographic images. Moreover, the blood perfusion images, and vasomotor
answer are consistent, therefore, they can be a better biomarker than
thermographic analysis in identifying emotions.
Victor H. Aristizabal-Tique, Marcela Henao-Pérez, Diana Carolina López-Medina, Renato Zambrano-Cruz, Gloria Díaz-Londoñod
2023-01-18
