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Plapous Cyril Berrani Sid-Ahmed Besset Benoit Rault Jean-Bernard 《Multimedia Tools and Applications》2018,77(5):5929-5948
Multimedia Tools and Applications - This paper proposes a new optimized audio-based fingerprinting technology for embedded applications. The target use case is related to TV content synchronization... 相似文献
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In this paper, the impact of outliers on the performance of high-dimensional data analysis methods is studied in the context
of face recognition. Most of the existing face recognition methods are based on PCA-like methods: faces are projected into
a lower dimensional space in which similarity between faces is supposed to be more easily evaluated. These methods are, however,
very sensitive to the quality of the face images used in the training and in the recognition phases. Their performance significantly
drops when face images are not well centered or taken under variable illumination conditions. In this paper, we study this
phenomenon for two face recognition methods, namely PCA and LDA2D, and we propose a filtering process that allows the automatic
selection of noisy face images which are responsible for the performance degradation. This process uses two techniques. The
first one is based on the recently proposed robust high-dimensional data analysis method called RobPCA. It is specific to
the case of recognition from video sequences. The second technique is based on a novel and effective face classification technique.
It allows isolating still face images that are not very precisely cropped, not well-centered or in a non-frontal pose. Experiments
show that this filtering process significantly improves recognition rates by 10 to 30%.
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Christophe GarciaEmail: |
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Omar Dagdag Avni Berisha Zaki Safi Saïd Dagdag Majda Berrani Shehdeh Jodeh Chandrabhan Verma Eno E. Ebenso Nuha Wazzan Ahmed El Harfi 《应用聚合物科学杂志》2020,137(34):49003
The purpose of present study is in the direction of development of an anticorrosive coating formulation of high durability for carbon steel corrosion in 3 wt% NaCl medium. The formulation comprises of a macromolecular epoxy coating (DGEDDS-MDA) based bisphenol S diglycidyl ether (DGEDDS) cured with a methylene dianiline (MDA). The formulation was characterized by FT-IR spectroscopy method. Performance of the epoxy coating was represented using PDP and EIS approaches. The formulation acts as effective anticorrosive coating for long durability (180 days). Surfaces of the specimens before and after 180 days exposure to UV radiation were examined using SEM. PDP, SEM, and EIS studies showed that DGEDDS-MDA acted as highly durable and effective anticorrosive formulation. Results also showed that the formulation acts as interface type inhibitor and its presence enhances the polarization resistance (Rp) value. DFT study suggests that the formulation DGEDDS-MDA possesses strong ability to interact with metal surface through its several electron rich centers. MD and MC simulations showed that studied formulation effectively adsorb on the substrate (metallic surface). Results of EIS, PDP, and SEM studies (experimental) were well-supported by DFT, MD, and MC (computational) simulations. 相似文献
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