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• W3046620880 abstract "Recognition of facial expressions across various actors, contexts, and recording conditions in real-world videos involves identifying local facial movements. Hence, it is important to discover the formation of expressions from local representations captured from different parts of the face. So in this paper, we propose a dynamic kernel-based representation for facial expressions that assimilates facial movements captured using local spatio-temporal representations in a large universal Gaussian mixture model (uGMM). These dynamic kernels are used to preserve local similarities while handling global context changes for the same expression by utilizing the statistics of uGMM. We demonstrate the efficacy of dynamic kernel representation using three different dynamic kernels, namely, explicit mapping based, probability-based, and matching-based, on three standard facial expression datasets, namely, MMI, AFEW, and BP4D. Our evaluations show that probability-based kernels are the most discriminative among the dynamic kernels. However, in terms of computational complexity, intermediate matching kernels are more efficient as compared to the other two representations." @default.
• W3046620880 created "2020-08-07" @default.
• W3046620880 creator A5012566120 @default.
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• W3046620880 date "2020-01-01" @default.
• W3046620880 modified "2023-10-18" @default.
• W3046620880 title "Facial Expression Recognition in Videos Using Dynamic Kernels" @default.
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• W3046620880 doi "https://doi.org/10.1109/tip.2020.3011846" @default.
• W3046620880 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32746249" @default.
• W3046620880 hasPublicationYear "2020" @default.
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