Abstract

Artificial social intelligence is a step towards human-like human-computer interaction. One important milestone towards building socially intelligent systems is enabling computers with the ability to process and interpret the social signals of humans in the real world. Social signals include a wide range of emotional responses from a simple smile to expressions of complex affects. This dissertation revolves around computational models for social signal processing in the wild, using multimodal signals with an emphasis on the visual modality. We primarily focus on complex affect recognition with a strong interest in curiosity. In this dissertation,we ?rst present our collected dataset, EmoReact. We provide detailed multimodal behavior analysis across audio-visual signals and present unimodal and multimodal classi?cation models for affect recognition. Second, we present a deep multimodal fusion algorithm to fuse information from visual, acoustic and verbal channels to achieve a uni?ed classi?cation result. Third, we present a novel system to synthesize, recognize and localize facial occlusions. The proposed framework is based on a three-stage process: 1) Synthesis of naturalistic occluded faces, which include hand over face occlusions as well as other common occlusions such as hair bangs, scarf, hat, etc. 2) Recognition of occluded faces and differentiating between hand over face and other types of facial occlusions. 3) Localization of facial occlusions and identifying the occluded facial regions. Region of facial occlusion, plays an important role in recognizing affect and a shift in location can result in a very different interpretation, e.g., hand over chin can indicate contemplation, while hand over eyes may show frustration or sadness. Finally, we show the importance of considering facial occlusion type and region in affect recognition through achieving promising results in our experiments.

Notes

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Graduation Date

2017

Semester

Fall

Advisor

Hughes, Charles

Degree

Doctor of Philosophy (Ph.D.)

College

College of Engineering and Computer Science

Department

Computer Science

Degree Program

Computer Science

Format

application/pdf

Identifier

CFE0007291

URL

http://purl.fcla.edu/fcla/etd/CFE0007291

Language

English

Release Date

June 2023

Length of Campus-only Access

5 years

Access Status

Doctoral Dissertation (Campus-only Access)

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