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Alfalou A.,Institute Superieur Of Lelectronique Et Du Numerique | Brosseau C.,University of Western Brittany
Progress in Optics | Year: 2015

Optical processing of images has received much attention recently. Experimental breakthroughs have been achieved mainly by studying correlation applications for identification and tracking, two-dimensional and three-dimensional holography, compression and encryption of images, etc. While images are originally optical, numerical processing is often realized to fully exploit their information content. Within this context, our aim is to review the recent progress made in the field of optical processing of information. We consider techniques allowing us to increase image quality to render them more useful for correlation and reconstruction applications. The chapter is divided in two parts. In the first part, techniques for increasing image quality are described in detail. Interestingly, those dealing with color encoding are addressed. In addition, methods for denoising images are dealt with. The second part considers the polarization encoding methods. Throughout this review chapter, many examples illustrating the performances of these techniques are given. Future prospects for optimizing current techniques of optical processing of images are suggested. © 2015 Elsevier B.V. Source

Robert-Inacio F.,French National Center for Scientific Research | Robert-Inacio F.,Institute Superieur Of Lelectronique Et Du Numerique
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

This paper presents an algorithm enabling to detect disks on color images. The proposed method is based on a basic color segmentation giving a preliminary binary image. Then distance mapping is used to determine possible circles. And finally circle location is combined to color information in order to find the best-fitting disk. Furthermore, disks are, in a wide understanding, sets of points for which the distance to a particular point called center, is lower or equal to a given radius value. That is why the proposed method can also detect squares, octagons and other shapes that occur to be disks for a given distance, such as Euclidean, chessboard, Manhattan or chamfer distances. An application to pattern recognition for road sign interpretation is also presented in order to illustrate how road sign shape is a useful and significant information in the sign interpretation process. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE). Source

Thakkar C.,University of California at Berkeley | Kong L.,University of California at Berkeley | Jung K.,University of California at Berkeley | Frappe A.,Institute Superieur Of Lelectronique Et Du Numerique | Alon E.,University of California at Berkeley
IEEE Symposium on VLSI Circuits, Digest of Technical Papers | Year: 2011

This paper presents a low-power adaptive 60GHz baseband in 65nm CMOS. The design integrates variable gain amplifiers, analog phase rotator, 40-coefficient I/Q decision feedback equalizers (DFEs), clock generation and data recovery circuits, and adaptation hardware. The baseband achieves 10Gb/s while consuming 53mW (DFE adaptation on)/45mW (DFE adaptation off), representing ∼10X improvement in data-rate and power efficiency over prior art [3],[8]. © 2011 JSAP (Japan Society of Applied Physi. Source

Choqueuse V.,CNRS Brest Laboratory of Mechanics and Systems Laboratory | Benbouzid M.E.H.,CNRS Brest Laboratory of Mechanics and Systems Laboratory | Amirat Y.,CNRS Brest Laboratory of Mechanics and Systems Laboratory | Amirat Y.,Institute Superieur Of Lelectronique Et Du Numerique | Turri S.,CNRS Brest Laboratory of Mechanics and Systems Laboratory
IEEE Transactions on Industrial Electronics | Year: 2012

This paper deals with the diagnosis of three-phase electrical machines and focuses on failures that lead to stator-current modulation. To detect a failure, we propose a new method based on stator-current demodulation. By exploiting the configuration of three-phase machines, we demonstrate that the demodulation can be efficiently performed with low-complexity multidimensional transforms such as the Concordia transform (CT) or the principal component analysis (PCA). From a practical point of view, we also prove that PCA-based demodulation is more attractive than CT. After demodulation, we propose two statistical criteria aiming at measuring the failure severity from the demodulated signals. Simulations and experimental results highlight the good performance of the proposed approach for condition monitoring. © 2011 IEEE. Source

Delaleau E.,Institute Superieur Of Lelectronique Et Du Numerique
2014 IEEE Conference on Norbert Wiener in the 21st Century: Driving Technology's Future, 21CW 2014 - Incorporating the Proceedings of the 2014 North American Fuzzy Information Processing Society Conference, NAFIPS 2014, Conference Proceedings | Year: 2014

Cybernetics involves Control Theory and Control Practice. From its roots, Cybernetics has always been intimately to Control. The paper is devoted to the proof of an important theorem for the development of control: the closed loop stability of control laws that are calculated in the framework of model-free control. Everyone knows the importance of control in the field of Cybernetics [1]. © 2014 IEEE. Source

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