Mai K Nguyen

Work place: Laboratoire Equipes de Traitement de l’Information et Système (ETIS), CY Cergy Paris Université/ENSEA/ CNRS UMR 8051, F-95000 Cergy-Pontoise, France



Research Interests: Image Compression, Image Manipulation, Image Processing


Dr. Mai K. Nguyen received her Ph.D. in signal and image processing from Grenoble National Polytechnic Institute, France, in 1988. She has been a professor in the Department of Computer Science at the University of Cergy-Pontoise since 2005 (becoming CY Paris Cergy Universty since January 1st 2020). Her research interests include inverse problems, generalized Radon transforms and their applications in imaging science, scattered ionizing radiation imaging, biomedical imaging, and non-destructive evaluation. She is an IEEE Senior member.

Author Articles
A Conic Radon-based Convolutional Neural Network for Image Recognition

By Dhekra El Hamdi Ines Elouedi Mai K Nguyen Atef Hamouda

DOI:, Pub. Date: 8 Feb. 2023

This article presents a new approach for image recognition that proposes to combine Conical Radon Transform (CRT) and Convolutional Neural Networks (CNN).
In order to evaluate the performance of this approach for pattern recognition task, we have built a Radon descriptor enhancing features extracted by linear, circular and parabolic RT. The main idea consists in exploring the use of Conic Radon transform to define a robust image descriptor. Specifically, the Radon transformation is initially applied on the image. Afterwards, the extracted features are combined with image and then entered as an input into the convolutional layers. Experimental evaluation demonstrates that our descriptor which joins together extraction of features of different shapes and the convolutional neural networks achieves satisfactory results for describing images on public available datasets such as, ETH80, and FLAVIA. Our proposed approach recognizes objects with an accuracy of 96 % when tested on the ETH80 dataset. It also has yielded competitive accuracy than state-of-the-art methods when tested on the FLAVIA dataset with accuracy of 98 %. We also carried out experiments on traffic signs dataset GTSBR. We investigate in this work the use of simple CNN models to focus on the utility of our descriptor. We propose a new lightweight network for traffic signs that does not require a large number of parameters. The objective of this work is to achieve optimal results in terms of accuracy and to reduce network parameters. This approach could be adopted in real time applications. It classified traffic signs with high accuracy of 99%.

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