Human emotions detection based on a smart-thermal system of thermographic images

Viejo

et al. 2019

Study of emotions has gained interest in the field of sensory and consumer research. Accurate information can be obtained by studying physiological behavior along with self-reported-responses. The aim was to identify physiological and self-reported-responses towards visual stimuli and predict self-reported-responses using biometrics. Panelists (N = 63) were exposed to 12 images (ten from Geneva Affective PicturE Database (GAPED), two based on common fears) and a questionnaire (Face scale and EsSense). Emotions from facial expressions (FaceReaderTM), heart rate (HR), systolic pressure (SP), diastolic pressure (DP), and skin temperature (ST) were analyzed. Multiple regression analysis was used to predict self-reported-responses based on biometrics. Results showed that physiological along with self-reported responses were able to separate images based on cluster analysis as positive, neutral, or negative according to GAPED classification. Emotional terms with high or low valence were predicted by a general linear regression model using biometrics, while calm, which is in the center of emotion dimensional model, was not predicted. After separating images, positive and neutral categories could predict all emotional terms, while negative predicted Happy, Sad, and Scared. Heart Rate predicted emotions in positive (R2 = 0.52 for Scared) and neutral (R2 = 0.55 for Sad) categories while ST in positive images (R2 = 0.55 for Sad, R2 = 0.45 for Calm).

Section: Introductionmentioning

confidence: 91%

Effects of Imagery as Visual Stimuli on the Physiological and Emotional Responses

Viejo

et al. 2019

“…Regarding positive emotions, previous human studies revealed facial temperature changes in opposite directions; four studies found a decrease: (Cruz‐Albarran, Benitez‐Rangel, Osornio‐Rios, & Morales‐Hernandez, ; Nakanishi & Imai‐Matsumura, ; Salazar‐López et al, ; Zajonc et al, ) and three studies found an increase: (Robinson et al, ; Salazar‐López et al, ; Zenju, Nozawa, Tanaka, & Ide, ). Interestingly, one of the former studies showed a drop in laughing infants (Nakanishi & Imai‐Matsumura, ), which might be linked to a more rudimentary physiological process, and a slight decrease in the nose tip was observed in a previous study on children play, although no statistical significance was found (Ioannou et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…A comparable study on nonhuman primate positive emotional states, more specifically emotions that reflect human joy, is likely to provide here more insight for a reconstruction of a primordial emotion system. In addition, a study suggested that anger induced facial temperature changes, but it did not use statistical tests to support these statements (Cruz‐Albarran et al, : increase in the forehead and decrease in the nose and maxillary temperatures).…”

Section: Introductionmentioning

confidence: 99%

Infrared thermal imaging: Positive and negative emotions modify the skin temperatures of monkey and ape faces

Chotard

Ioannou

Davila‐Ross

2018

American J Primatol

Facial thermography has enabled researchers to noninvasively and continuously measure the changes of a range of emotional states in humans. The present work used this novel technology to study the effect of positive and negative emotions in nonhuman primates by focusing on four facial areas (the peri-orbital area, the nose bridge, the nose tip, and the upper lip). Monkeys and apes were examined for positive emotions (during interactions with toys and during tickling) and for negative emotions (during food delay and teasing). For the combined toy and tickling condition, the results indicated a drop in the nose tip temperature and a tendency of an increase in the peri-orbital temperature. For the combined food delay and teasing condition, the results also revealed a rise in the upper lip temperature of the subjects. These different effects on the facial temperatures in monkeys and apes most likely reflect distinctive physiological reactions of a primordial primate emotion system. We conclude that facial thermal imaging represents a promising physiologically grounded technology to noninvasively and continuously obtain reliable data on emotional states in nonhuman primates, which may help modernize research on emotions in nonhuman primates and enhance our understanding of the evolution of human emotions.

Int J Adv Manuf Technol

“…In recent years, the prices of thermal imaging cameras have dropped which makes the technique more available. Today, it is found in many vastly, different areas, such as human emotion detection, fault diagnostic in rotary machinery, monitoring of heat distribution systems, control of laser welding, and fault detection in induction motors [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Monitoring and evaluation of the wire drawing process using thermal imaging

Larsson

Jansson

Karlsson

2018

Wire drawing is a cold work metal forming process which is dependant of a functional lubrication process. If the lubrication fails, there is a risk that both the tools and the produced wire will be damaged. Process monitoring of wire drawing is rare in today's industry since there are no commercialised methods that deliver consistent results. In this paper, a method for monitoring of the wire drawing process is proposed and evaluated. A thermal imaging camera was used for acquiring thermal images of the wire as it leaves the drawing tool. It was found that the proposed method could capture changes in the wire drawing process and had correlation to the drawing force. An equation for estimating the friction condition between the wire and the drawing die using the wire temperature was also proposed and evaluated against experiments. The results showed that the new equation produced results that correlated well to results obtained using a conventional equation that use drawing force.