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An Efficient HW/SW Design for Text Extraction from Complex Color Image

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Computers, Materials & Continua 2022年第6期71卷 5963-5977页

作者： Mohamed Amin Ben Atitallah Rostom Kachouri Ahmed Ben Atitallah Hassene Mnif LETI(E.N.I.S.) University of SfaxSfaxTunisia Laboratory of informatics Gaspard-MongeA3SIESIEE ParisCNRSGustave Eiffel UniversityFrance National Engineering School of Gabes(ENIG) University of GabesTunisia Department of Electrical Engineering Jouf UniversitySakakaAljoufSaudi Arabia

In the context of constructing an embedded system to help visually impaired people to interpret text,in this paper,an efficient High-level synthesis(HLS)Hardware/Software(HW/SW)design for text extraction using the Gamma Correction Method(GCM)is ***,the GCM is a common method used to extract text from a complex color image and *** purpose of this work is to study the complexity of the GCM method on Xilinx ZCU102 FPGA board and to propose a HW implementation as Intellectual Property(IP)block of the critical blocks in this method using HLS flow with taking account the quality of the text *** IP is integrated and connected to the ARM Cortex-A53 as coprocessor in HW/SW codesign *** experimental results show that theHLS HW/SW implementation of the GCM method on ZCU102 FPGA board allows a reduction in processing time by about 89%compared to the SW *** result is given for the same potency and strength of SW implementation for the text extraction.

关键词： Text extraction GCM HW/SW codesign FPGA HLS flow

Zinc oxide nano-enabled microfluidic reactor for water purification and its applicability to volatile organic compounds

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Microsystems & Nanoengineering 2018年第1期4卷 450-456页

作者： Imadeddine Azzouz Yamina Ghozlane Habba Martine Capochichi-Gnambodoe Frédéric Marty Jérôme Vial Yamin Leprince-Wang Tarik Bourouina Universitéparis-Est ESIEE-ParisESYCOM EA 25522 Boulevard Blaise Pascal93162 Noisy-le-GrandFrance Universitéparis-Est UPEMESYCOM EA 25525 Boulevard Descartes77420 Champs sur MarneFrance LSABM CNRS UMR 8231ESPCI ParisTech-PSL Research University10 Rue Vauquelin75005 ParisFrance

This paper reports fast and efficient chemical decontamination of water within a tree-branched centimeter-scale microfluidic *** microreactor integrates Zinc oxide nanowires(ZnO NWs)in situ grown acting as an efficient photocatalytic nanomaterial *** growth of ZnO NWs within the microfluidic chamber brings this photocatalytic medium at the very close vicinity of the water flow path,hence minimizing the required interaction time to produce efficient purification *** demonstrate a degradation efficiency of 95%in o5 s of residence time in one-pass *** to our estimates,it becomes attainable using microfluidic reactors to produce decontamination of merely 1 l of water per day,typical of the human daily drinking water *** conduct our experiments,we have chosen a laboratory-scale case study as a seed for addressing the health concern of water contamination by volatile organic compounds(VOCs),which remain difficult to remove using alternative decontamination techniques,especially those involving water *** contaminated water sample contains mixture of five pollutants:Benzene;Toluene;Ethylbenzene;m–p Xylenes;and o-Xylene(BTEX)diluted in water at 10 *** of *** was analytically monitored in a selective manner until it falls below 1 *** each of the five pollutants,corresponding to the maximum contaminant level(MCL)established by the US Environmental Protection Agency(EPA).We also report on a preliminary study,investigating the nature of the chemical by-products after the photocatalytic VOCs degradation process.

关键词： microfluidic reactor water purification zinc oxide nanowires volatile organic compounds(VOCs) Benzene,Toluene,Ethylbenzene,m-p Xylenes,o-Xylene(BTEX)

On-chip parallel Fourier transform spectrometer for broadband selective infrared spectral sensing

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Microsystems & Nanoengineering 2020年第1期6卷 1267-1275页

作者： Alaa Fathy Yasser M.Sabry Sebastien Nazeer Tarik Bourouina Diaa A.Khalil Faculty of Engineering Ain-Shams University1 Elsarayat St.AbbassiaCairoEgypt Si-Ware Systems 3 Khalid Ibn Al-Waleed St.HeliopolisCairoEgypt Universitéparis-Est ESYCOM EA 2552ESIEE Paris93162 Noisy-le-GrandFrance

Optical spectrometers enable contactless chemical ***,decreasing both their size and cost appears to be a prerequisite to their widespread ***-scale implementation of optical spectrometers still requires tackling two main ***,operation over a broad spectral range extending to the infrared is required to enable covering the molecular absorption spectrum of a broad variety of *** is addressed in our work with an Micro-Electro Mechanical Systems(MEMS)-based Fourier transform infrared spectrometer with an embedded movable micro-mirror on a silicon ***,fine spectral resolutionΔλis also required to facilitate screening over several chemicals.A fundamental limit states thatΔλis inversely proportional to the mirror motion range,which cannot exceed the chip *** boost the spectral resolution beyond this limit,we propose the concept of parallel(or multi-core)FTIR,where multiple interferometers provide complementary optical paths using the same actuator and within the same *** concept scalability is validated with 4 interferometers,leading to approximately 3 times better spectral *** the atmospheric contents of a greenhouse gas are monitored,the methane absorption bands are successfully measured and discriminated using the presented device.

关键词： interferometer spectral mirror

Silicon micromirrors with three-dimensional curvature enabling lensless efficient coupling of free-space light

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Light(Science & Applications) 2013年第1期2卷 98-106页

作者： Yasser M Sabry Bassam Saadany Diaa Khalil Tarik Bourouina Universite paris-Est ESYCOM(EA 2552)ESIEE ParisF-93162 Noisy-le-GrandFrance Si-Ware Systems 3 Khaled Ibn El-Waleed StreetHeliopolisCairo 11361Egypt Electron.and Comm.Eng.Dept. Faculty of Eng.Ain-Shams UniversityCairoEgypt

Miniaturized optical benches process free-space light propagating in-plane with respect to the substrate and have a large variety of applications,including the coupling of light through an optical *** coupling efficiency is usually obtained using assembled micro-optical parts,which considerably increase the system cost and integration *** this work,we report a high coupling efficiency,monolithically integrated silicon micromirror with controlled three-dimensional(3D)curvature that is capable of manipulating optical beams propagating in the plane of the silicon *** on our theoretical modeling,a spherical micromirror with a microscale radius of curvature as small as twice the Gaussian beam Rayleigh range provides a 100%coupling efficiency over a relatively long optical path *** dimensionless parameters facilitates the elucidation of the role of key design parameters,including the mirror’s radii of curvature,independent of the wavelength.A micromachining method is presented for fabricating the 3D micromirror using fluorinated gas *** measured coupling efficiency was greater than 50%over a 200-mm optical path,compared to less than 10%afforded by a conventional flat micromirror,which was in good agreement with the *** the 3D micromirror,an optical cavity was formed with a round-trip diffraction loss of less than 0.4%,resulting in one order of magnitude enhancement in the measured quality factor.A nearly 100%coupling was also estimated when matching the sagittal and tangential radii of curvature of the presented micromirror’s *** reported class of 3D micromirrors may be an advantageous replacement for the optical lenses usually assembled in silicon photonics and optical benches by transforming them into real 3D monolithic systems while achieving wideband high coupling efficiency over submillimeter distances.

关键词： coupling efficiency Gaussian beam coupling micro-optics monolithic chip optical cavity optical fabrication optical benches silicon photonics

A power supply module for autonomous portable electronics:ultralow-frequency MEMS electrostatic kinetic energy harvester with a comb structure reducing air damping

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Microsystems & Nanoengineering 2018年第1期4卷 128-140页

作者： Yingxian Lu Frédéric Marty Dimitri Galayko Jean-Marc Laheurte Philippe Basset Universitéparis-Est ESYCOM(EA2552)CNAMESIEE Paris and UPEMLVNoisyle-Grand 93162France Sorbonne Université LIP6 labCIAN groupJussieu campusParis 75005France Universitéparis-Est ESYCOM(EA2552)CNAMESIEE Paris and UPEMLVMarne-la-Vallée 77420France

A MEMS electrostatic kinetic energy harvester(e-KEH)of about 1 cm2,working at ultralow frequency(1–20 Hz),without any supported additional mass on its mobile electrode,and working even without a vacuum environment is *** prototype is especially suitable for environments with abundant low frequency motions such as wearable *** proposed e-KEH consists of a capacitor with a finger-teeth interdigited comb *** greatly reduces the air damping effect,and thus the capacitance variation remains important regardless of the presence of *** the new design,the energy transduced per cycle of excitation is no less than 33 times higher than the classic design within 10–40 Hz/2 g_(peak),while is 85 times higher at 15 Hz/2 g_(peak).An enclosed miniature ball combined with non-linear stoppers enables the oscillation of the movable electrode through impact-based frequency up-conversion mechanism,which is also improved by the low air *** to this new design,a higher efficiency than the classic gap-closing comb structure is obtained,as a larger range of working frequency(1–180 Hz)in air.A maximum energy conversion of 450 nJ/cycle is obtained with a bias voltage of 45 V and an acceleration of 11 Hz,3 g_(peak).Working with a diode AC-DC rectifier,the proposed KEH is able to support up to 3 RFID communications within 16 s while operated at 11 Hz,3 g_(peak).

关键词： autonomous kinetic electrostatic

An Efficient Text Recognition System from Complex Color Image for Helping the Visually Impaired Persons

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Computer Systems Science & Engineering 2023年第7期46卷 701-717页

作者： Ahmed Ben Atitallah Mohamed Amin Ben Atitallah Yahia Said Mohammed Albekairi Anis Boudabous Turki MAlanazi Khaled Kaaniche Mohamed Atri Department of Electrical Engineering College of EngineeringJouf UniversitySakakaSaudi Arabia Laboratory of Informatics Gaspard-MongeA3SIESIEE ParisCNRSGustave Eiffel UniversityFrance LETI ENISUniversity of SfaxSfaxTunisia Remote Sensing Unit College of EngineeringNorthern Border UniversityArarSaudi Arabia Laboratory of Electronics and Microelectronics(LR99ES30) University of MonastirTunisia Department of Computer Engineering and Networks College of Computer and Information SciencesJouf UniversitySakakaSaudi Arabia College of Computer Sciences King Khalid UniversityAbhaSaudi Arabia

The challenge faced by the visually impaired persons in their day-today lives is to interpret text from *** this context,to help these people,the objective of this work is to develop an efficient text recognition system that allows the isolation,the extraction,and the recognition of text in the case of documents having a textured background,a degraded aspect of colors,and of poor quality,and to synthesize it into *** system basically consists of three algorithms:a text localization and detection algorithm based on mathematical morphology method(MMM);a text extraction algorithm based on the gamma correction method(GCM);and an optical character recognition(OCR)algorithm for text recognition.A detailed complexity study of the different blocks of this text recognition system has been *** this study,an acceleration of the GCM algorithm(AGCM)is *** AGCM algorithm has reduced the complexity in the text recognition system by 70%and kept the same quality of text recognition as that of the original *** assist visually impaired persons,a graphical interface of the entire text recognition chain has been developed,allowing the capture of images from a camera,rapid and intuitive visualization of the recognized text from this image,and text-to-speech *** text recognition system provides an improvement of 6.8%for the recognition rate and 7.6%for the F-measure relative to GCM and AGCM algorithms.

关键词： Text recognition system GCM AGCM OCR color images graphical interface

Parametric Methods for the Regional Assessment of Cardiac Wall Motion Abnormalities: Comparison Study

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Computers, Materials & Continua 2021年第10期69卷 1233-1252页

作者： Narjes Benameur Mazin Abed Mohammed Ramzi Mahmoudi Younes Arous Begonya Garcia-Zapirain Karrar Hameed Abdulkareem Mohamed Hedi Bedoui University of Tunis El Manar Higher Institute of Medical Technologies of TunisLaboratory of Biophysics and Medical TechnologiesTunisTunisia College of Computer Science and Information Technology University of Anbar31001AnbarIraq Faculty of Medicine of Monastir Medical Imaging Technology Lab-LTIM-LR12ES06University of Monastir5019MonastirTunisia Gaspard-Monge Computer-Science Laboratory Paris-Est UniversityMixed Unit CNRS-UMLV-ESIEE UMR8049BP99ESIEE Paris CitéDescartes93162 Noisy Le GrandFrance Military Hospital of Instruction of Tunis TunisTunisia eVIDA Lab University of DeustoAvda/Universidades 24Bilbao48007Spain College of Agriculture Al-Muthanna UniversitySamawah66001Iraq

Left ventricular(LV)dysfunction is mainly assessed by global contractile indices such as ejection fraction and LV Volumes in cardiac *** these indices give information about the presence or not of LV alteration,they are not able to identify the location and the size of such *** aim of this study is to compare the performance of three parametric imaging techniques used in cardiac MRI for the regional quantification of cardiac *** proposed approaches were evaluated on 20 patients with myocardial infarction and 20 subjects with normal *** parametric images approaches:covariance analysis,parametric images based on Hilbert transform and those based on the monogenic signal were evaluated using cine-MRI frames acquired in three planes of *** results show that parametric images generated from the monogenic signal were superior in term of sensitivity(89.69%),specificity(86.51%)and accuracy(89.06%)to those based on covariance analysis and Hilbert transform in the detection of contractile dysfunction related to myocardial ***,the parametric image based on the monogenic signal is likely to provide additional regional indices about LV dysfunction and it may be used in clinical practice as a tool for the analysis of the myocardial alterations.

关键词： Covariance analysis cardiac MRI monogenic signal assessment Hilbert transform

Discrete Plane Segmentation and Estimation from a Point Cloud Using Local Geometric Patterns

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International Journal of Automation and computing 2008年第3期5卷 246-256页

作者： Yukiko Kenmochi Lilian Buzer Akihiro Sugimoto Ikuko Shimizu Université paris-Est Laboratoire d'Informatique de l'Institut Gaspard-MongeUMR CNRS 8049 A2SI-ESIEECité DescartesBP 9993162 Noisy-le-Grand CedexFrance Department of Computer Information and Communication SciencesTokyo University of Agriculture and Technology

This paper presents a method for segmenting a 3D point cloud into planar surfaces using recently obtained discretegeometry results. In discrete geometry, a discrete plane is defined as a set of grid points lying between two parallel planes with a small distance, called thickness. In contrast to the continuous case, there exist a finite number of local geometric patterns （LGPs） appearing on discrete planes. Moreover, such an LGP does not possess the unique normal vector but a set of normal vectors. By using those LGP properties, we first reject non-linear points from a point cloud, and then classify non-rejected points whose LGPs have common normal vectors into a planar-surface-point set. From each segmented point set, we also estimate the values of parameters of a discrete plane by minimizing its thickness.

关键词： Discrete plane image segmentation parameter estimation discrete geometry local geometric pattern (LGP)

Spatiotemporal dynamics of nanowire growth in a microfluidic reactor

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Microsystems & Nanoengineering 2021年第5期7卷 141-150页

作者： Mazen Erfan Martine Gnambodoe-Capochichi Yasser MSabry Diaa Khalil Yamin Leprince-Wang Tarik Bourouina ESYCOM CNRS UMR 9007Universite Gustave EiffelESIEE ParisNoisy-le-GrandFrance Ain Shams University Faculty of EngineeringECE DepartmentCairoEgypt

Co-integration of nanomaterials into microdevices poses several technological challenges and presents numerous scientific opportunities that have been addressed in this paper by integrating zinc oxide nanowires(ZnO-NWs)into a microfluidic *** addition to the applications of these combined materials,this work focuses on the study of the growth dynamics and uniformity of nanomaterials in a tiny microfluidic reactor environment.A unique experimental platform was built through the integration of a noninvasive optical charaaerization technique with the microfluidic *** platform allowed the unprecedented demonstration of time-resolved and spatially resolved monitoring of the in situ growth of NWs,in which the chemicals were continuously fed into the microfluidic *** platform was also used to assess the uniformity of NWs grown quickly in a 10-mm-wide microchamber,which was intentionally chosen to be 20 times wider than those used in previous attempts because it can accommodate applications requiring a large surface of interaction while still taking advantage of submillimeter *** observations included the effects of varying the flow rate on the NW diameter and length in addition to a synergetic effect of continuous renewal of the growth solution and the confined environment of the chemical reaction.

关键词： nanowires fluid dynamics