1 code implementation • 30 Jun 2024 • Max Muzeau, Joana Frontera-Pons, Chengfang Ren, Jean-Philippe Ovarlez
Comprehensive evaluations on various downstream tasks, including few-shot classification, segmentation, visualization, and pattern detection, demonstrate the effectiveness and versatility of the proposed approach.
2 code implementations • 16 Feb 2023 • Jose Agustin Barrachina, Chengfang Ren, Gilles Vieillard, Christele Morisseau, Jean-Philippe Ovarlez
This work explains in detail the theory behind Complex-Valued Neural Network (CVNN), including Wirtinger calculus, complex backpropagation, and basic modules such as complex layers, complex activation functions, or complex weight initialization.
1 code implementation • 28 Oct 2022 • José Agustin Barrachina, Chengfang Ren, Christèle Morisseau, Gilles Vieillard, Jean-Philippe Ovarlez
In this paper, we investigated the semantic segmentation of Polarimetric Synthetic Aperture Radar (PolSAR) using Complex-Valued Neural Network (CVNN).
no code implementations • 28 Oct 2022 • Max Muzeau, Chengfang Ren, Sébastien Angelliaume, Mihai Datcu, Jean-Philippe Ovarlez
Experiments are performed to show the advantages of our method compared to the conventional Reed-Xiaoli algorithm, highlighting the importance of an efficient despeckling pre-processing step.
1 code implementation • 7 Sep 2022 • Antoine Collas, Arnaud Breloy, Chengfang Ren, Guillaume Ginolhac, Jean-Philippe Ovarlez
The proposed Riemannian gradient descent algorithm is leveraged to solve this second minimization problem.
1 code implementation • 23 Feb 2022 • Antoine Collas, Arnaud Breloy, Guillaume Ginolhac, Chengfang Ren, Jean-Philippe Ovarlez
This paper proposes new algorithms for the metric learning problem.
1 code implementation • 17 Sep 2020 • Jose Agustin Barrachina, Chenfang Ren, Christele Morisseau, Gilles Vieillard, Jean-Philippe Ovarlez
First, we show the potential interest of Complex-Valued Neural Network (CVNN) on classification tasks for complex-valued datasets.
no code implementations • 14 Apr 2019 • Ahmad W. Bitar, Jean-Philippe Ovarlez, Loong-Fah Cheong, Ali Chehab
The sparse component is directly used for the detection, that is, the targets are simply detected at the non-zero entries of the sparse target HSI.
no code implementations • 16 Aug 2018 • Ahmad W. Bitar, Loong-Fah Cheong, Jean-Philippe Ovarlez
In this paper, we propose a method for separating known targets of interests from the background in hyperspectral imagery.
Image and Video Processing Signal Processing
no code implementations • 24 Nov 2017 • Ahmad W. Bitar, Loong-Fah Cheong, Jean-Philippe Ovarlez
Given a target prior information, our goal is to propose a method for automatically separating targets of interests from the background in hyperspectral imagery.