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Facial expression recognition and histograms of oriented gradients: a comprehensive study
- Source :
- SpringerPlus 4 (2015). doi:10.1186/s40064-015-1427-3, info:cnr-pdr/source/autori:Carcagni P.; Del Coco M.; Leo M.; Distante C./titolo:Facial expression recognition and histograms of oriented gradients: a comprehensive study/doi:10.1186%2Fs40064-015-1427-3/rivista:SpringerPlus/anno:2015/pagina_da:/pagina_a:/intervallo_pagine:/volume:4, SpringerPlus
- Publication Year :
- 2015
- Publisher :
- Springer, London/England, 2015.
-
Abstract
- Automatic facial expression recognition (FER) is a topic of growing interest mainly due to the rapid spread of assistive technology applications, as human–robot interaction, where a robust emotional awareness is a key point to best accomplish the assistive task. This paper proposes a comprehensive study on the application of histogram of oriented gradients (HOG) descriptor in the FER problem, highlighting as this powerful technique could be effectively exploited for this purpose. In particular, this paper highlights that a proper set of the HOG parameters can make this descriptor one of the most suitable to characterize facial expression peculiarities. A large experimental session, that can be divided into three different phases, was carried out exploiting a consolidated algorithmic pipeline. The first experimental phase was aimed at proving the suitability of the HOG descriptor to characterize facial expression traits and, to do this, a successful comparison with most commonly used FER frameworks was carried out. In the second experimental phase, different publicly available facial datasets were used to test the system on images acquired in different conditions (e.g. image resolution, lighting conditions, etc.). As a final phase, a test on continuous data streams was carried out on-line in order to validate the system in real-world operating conditions that simulated a real-time human–machine interaction.
- Subjects :
- Facial expression
Multidisciplinary
Computer science
business.industry
Research
SVM
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Pattern recognition
computer.software_genre
Pipeline (software)
Session (web analytics)
Set (abstract data type)
Support vector machine
Histogram of oriented gradients
HOG
Histogram
Data mining
Artificial intelligence
business
Facial expression recognition
computer
Image resolution
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- SpringerPlus 4 (2015). doi:10.1186/s40064-015-1427-3, info:cnr-pdr/source/autori:Carcagni P.; Del Coco M.; Leo M.; Distante C./titolo:Facial expression recognition and histograms of oriented gradients: a comprehensive study/doi:10.1186%2Fs40064-015-1427-3/rivista:SpringerPlus/anno:2015/pagina_da:/pagina_a:/intervallo_pagine:/volume:4, SpringerPlus
- Accession number :
- edsair.doi.dedup.....18183606cb9e999d055a5c59ccbcf88d