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CFD: a collaborative feature difference method for spontaneous micro-expression spotting

Han, Yiheng, Li, Bingjun, Lai, Yukun ORCID: and Liu, Yong-Jin 2018. CFD: a collaborative feature difference method for spontaneous micro-expression spotting. Presented at: IEEE International Conference on Image Processing, Athens, Greece, 7-10 October 2018. 2018 25th IEEE International Conference on Image Processing (ICIP). IEEE, pp. 1942-1946. 10.1109/ICIP.2018.8451065

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Micro-expression (ME) is a special type of human expression which can reveal the real emotion that people want to conceal. Spontaneous ME (SME) spotting is to identify the subsequences containing SMEs from a long facial video. The study of SME spotting has a significant importance, but is also very challenging due to the fact that in real-world scenarios, SMEs may occur along with normal facial expressions and other prominent motions such as head movements. In this paper, we improve a state-of-the-art SME spotting method called feature difference analysis (FD) in the following two aspects. First, FD relies on a partitioning of facial area into uniform regions of interest (ROIs) and computing features of a selected sequence. We propose a novel evaluation method by utilizing the Fisher linear discriminant to assign a weight for each ROI, leading to more semantically meaningful ROIs. Second, FD only considers two features (LBP and HOOF) independently. We introduce a state-of-the-art MDMO feature into FD and propose a simple yet efficient collaborative strategy to work with two complementary features, i.e., LBP characterizing texture information and MDMO characterizing motion information. We call our improved FD method collaborative feature difference (CFD). Experimental results on two well-established SME datasets SMIC-E and CASME II show that CFD significantly improves the performance of the original FD.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Computer Science & Informatics
Publisher: IEEE
ISBN: 978-1-4799-7062-9
ISSN: 2381-8549
Funders: Royal Society
Date of First Compliant Deposit: 24 May 2018
Date of Acceptance: 4 May 2018
Last Modified: 23 Oct 2022 13:46

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