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Saliency-based framework for facial expression recognition
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DOI：10.1007/s11704-017-6114-9.png)
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摘要
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This article proposes a novel framework for the recognition of six universal facial expressions. The framework is based on three sets of features extracted from a face image: entropy, brightness, and local binary pattern. First, saliency maps are obtained using the state-of-the-art saliency detection algorithm frequency-tuned salient region detection. The idea is to use saliency maps to determine appropriate weights or values for the extracted features (i.e., brightness and entropy). We have performed a visual experiment to validate the performance of the saliency detection algorithm against the human visual system. Eye movements of 15 subjects were recorded using an eye-tracker in free-viewing conditions while they watched a collection of 54 videos selected from the Cohn-Kanade facial expression database. The results of the visual experiment demonstrated that the obtained saliency maps are consistent with the data on human fixations. Finally, the performance of the proposed framework is demonstrated via satisfactory classification results achieved with the Cohn-Kanade database, FG-NET FEED database, and Dartmouth database of children's faces.
Keyword:
facial expression recognition
classification
salient regions
entropy
brightness
local binary pattern
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