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Color Edge Detection Using Multidirectional Sobel Filter and Fuzzy Fusion

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Computers, Materials & Continua 2023年第2期74卷 2839-2852页

作者： slim ben Chaabane Anas Bushnag Computer Engineering Department Faculty of Computers and Information TechnologyUniversity of TabukTabuk 47512Saudi Arabia Electrical Engineering Department University of Tunis CEREPENSIT 5 AvTaha Hussein1008TunisTunisia

A new model is proposed in this paper on color edge detection that uses the second derivative operators and data fusion *** secondorder neighborhood shows the connection between the current pixel and the surroundings of this *** connection is for each RGB component color of the input *** the image edges are detected for the three primary colors:red,green,and blue,these colors are merged using the combination ***,the final decision is applied to obtain the *** process allows different data sources to be combined,which is essential to improve the image information quality and have an optimal image ***,the segmentation results of the proposed model are ***,the classification accuracy of the tested data is assessed,and a comparison with other current models is *** comparison results show that the proposed model outperforms the existing models in image segmentation.

关键词： Segmentation edge detection second derivative operators data fusion technique fuzzy fusion classification

An FPGA Design for Real-Time Image Denoising

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Computer Systems Science & Engineering 2022年第11期43卷 803-816页

作者： ahmed ben Atitallah Department of Electrical Engineering Jouf UniversitySakakaAljoufSaudi Arabia

The increasing use of images in miscellaneous applications such as medical image analysis and visual quality inspection has led to growing interest in image ***,images are often contaminated with noise which may corrupt any of the following image processing ***,noise filtering is often a necessary preprocessing step for the most image processing ***,in this paper an optimized field-programmable gate array(FPGA)design is proposed to implement the adaptive vector directional distance filter(AVDDF)in hardware/software(HW/SW)codesign context for removing noise from the images in *** that,the high-level synthesis(HLS)flow is used through the Xilinx Vivado HLS tool to reduce the design complexity of the HW *** SW part is developed based on C/C++programming language and executed on an advanced reduced instruction set computer(RISC)machines(ARM)Cortex-A53 *** communication between the SW and HW parts is achieved using the advanced extensible Interface stream(AXI-stream)interface to increase the data *** experiment results on the Xilinx ZCU102 FPGA board show an improvement in processing time of the AVDDF filter by 98%for the HW/SW implementation relative to the SW *** result is given for the same quality of image between the HW/SW and SW implementations in terms of the normalized color difference(NCD)and the peak signal to noise ratio(PSNR).

关键词： AVDDF filter image denoising HW/SW codesign high-level synthesis FPGA

Investigation of Extracts from Tunisian Ethnomedicinal Plants as Antioxidants,Cytotoxins,and Antimicrobials

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Biomedical and Environmental Sciences 2017年第11期30卷 811-824页

作者： Guesmi Fatma ben Hadj ahmed Sami Landoulsi ahmed Laboratory of Biochemistry and Molecular Biology Faculty of Sciences of BizerteUniversity of CarthageZarzouna 7021Tunisia Laboratory of Protein Engineering and Bioactive Molecules(LIP-MB) National Institute of Applied Sciences and Technology(INSA T)BP 6761080 Tunis CedexTunisia

Objective To determine the medicinal potential of various plants and their parts extracted with different solvents. Methods The total phenolic content of acetonitrile/water（60%-40%）（ACN/W） and aqueous（W） extract fractions was determined by high-performance liquid chromatography（HPLC）, and terpenic compounds were detected by gas chromatography/mass spectrometry（GC/MS）. Antioxidant activity of the samples was evaluated using 2,2-diphenyl-1-picrylhydrazyl（DPPH） assay and β-carotene bleaching method. Cell viability was investigated by thiazolyl blue tetrazolium bromide [3-（4,5-dimethylthiazol）-2-yl 2,5-diphenyltetrazolium bromide]（MTT） assay. The mechanisms involved in cytotoxic activity were investigated in a murine macrophage cell line（RAW 264.7） and cancer lines. Results Our findings show that 11 plant species exhibited biological activity. In addition, moderate antibacterial activity was reported against one or more of the tested bacterial strains at two concentrations： 300 μg and 3 mg/disc. Furthermore, our data reveal that among all plants investigated, some extract and hydrophobic fractions were potent scavengers of the DPPH radical（6.78 μg/m L 〈 EC50 〈 8.55 μg/mL）. Taken together, our results show that Nerium oleander（NOACN/W） and Pituranthos tortuosus（PTACN/W） were highly cytotoxic against RAW 264.7 cells with IC80 values of 0.36, and 1.55 μg/mL, respectively. In contrast, murine macrophage cell lines had low growth and were significantly sensitive to water extracts of Thymus hirtus sp. algeriensis（THW）, Lavandula multifida（LMW）, and ACN/W extract of Erica multiflora（EMACN/W） at doses 〉 400, 47.20, and 116.74 μg/m L, respectively. The current work demonstrates that RAW 264.7 cell proliferation was inhibited by samples in a dose-dependent manner. Conclusion Our findings, validated through free radical scavenging activity, agar diffusion assay, and cytotoxicity of essential oils towards cancer cells, show that ethnomedicinal plants used in this work have a novel

关键词： Phenolic compounds Cytotoxicity Antioxidant Antibacterial

An Optimized SW/HW AVMF Design Based on High-Level Synthesis Flow for Color Images

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Computers, Materials & Continua 2021年第9期68卷 2925-2943页

作者： Turki MAlanazi ahmed ben Atitallah Imen Abid Department of Electrical Engineering Jouf UniversitySakakaAljoufSaudi Arabia LETI(E.N.I.S.) University of SfaxSfaxTunisia

In this paper,a software/hardware High-level Synthesis(HLS)design is proposed to compute the Adaptive Vector Median Filter(AVMF)in *** fact,this filter is known by its excellent impulsive noise suppression and chromaticity *** software(SW)study of this filter demonstrates that its implementation is too *** purpose of this work is to study the impact of using an HLS tool to design ideal floating-point and optimized fixed-point hardware(HW)architectures for the AVMF filter using square root function(ideal HW)and ROM memory(optimized HW),respectively,to select the best HLS architectures and to design an efficient HLS software/hardware(SW/HW)embedded AVMF design to achieve a trade-off between the processing time,power consumption and hardware *** that purpose,some approximations using ROM memory were proposed to perform the square root and develop a fixed-point AVMF *** that,the best solution generated for each HLS design was integrated in the SW/HW environment and evaluated under ZC702 FPGA *** experimental results showed a reduction of about 65%and 98%in both the power consumption and processing time for the ideal SW/HW implementation relative to the ideal SW implementation for an AVMF filter with the same image quality,***,the power consumption and processing time of the optimized SW/HW are 70%and 97%less than the optimized SW implementation,*** addition,the Look Up Table(LUTs)percentage,power consumption and processing time used by the optimized SW/HW design are improved by nearly 45%,18%and 61%compared the ideal SW/HW design,respectively,with slight decrease in the image quality.

关键词： AVMF filter SW/HW design HLS flow ZC702 FPGA platform

Unified FPGA Design for the HEVC Dequantization and Inverse Transform Modules

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Computers, Materials & Continua 2022年第6期71卷 4319-4335页

作者： Turki M.Alanazi ahmed ben Atitallah Department of Electrical Engineering Jouf UniversitySakakaAljouf2014Saudi Arabia

As the newest standard,the High Efficiency Video Coding(HEVC)is specially designed to minimize the bitrate for video data transfer and to support High Definition(HD)and ULTRA HD video resolutions at the cost of increasing computational complexity relative to earlier standards like the ***,real-time video decoding with HEVC decoder becomes a challenging ***,the Dequantization and Inverse Transform(DE/IT)are one of the computationally intensive modules in the HEVC decoder which are used to reconstruct the residual ***,in this paper,a unified hardware architecture is proposed to implement the HEVC DE/IT module for all Transform Unit(TU)block size,including 4×4,8×8,16×16 and 32×*** architecture is designed using the High-Level Synthesis(HLS)and the Low-Level Synthesis(LLS)methods in order to compare and determine the best method to implement in real-time the DE/IT *** fact,the C/C++programming language is used to generate an optimized hardware design for DE/IT module through the Xilinx Vivado HLS *** the other hand,the LLS hardware architecture is designed by the VHSIC Hardware Description language(VHDL)and using the pipeline technique to decrease the processing *** experimental results on the Xilinx XC7Z020 FPGA show that the LLS design increases the throughput in term of frame rate by 80%relative to HLS design with a 4.4%increase in the number of Look-Up Tables(LUTs).Compared with existing related works in literature,the proposed architectures demonstrate significant advantages in hardware cost and performance improvement.

关键词： HEVC decoder dequantization IDCT/IDST LLS design HLS design FPGA

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

A New Sliding Function for Discrete Predictive Sliding Mode Control of Time Delay Systems

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International Journal of Automation and computing 2013年第4期10卷 288-295页

作者： Abdennebi Nizar ben Mansour Houda Nouri ahmed Said Numerical Control of Industrial Processes National Engineering School of Gabes University of Gabes

The control of time delay systems is still an open area for research. This paper proposes an enhanced model predictive discrete-time sliding mode control with a new sliding function for a linear system with state delay. Firstly, a new sliding function including a present value and a past value of the state, called dynamic surface, is designed by means of linear matrix inequalities （LMIs）. Then, using this dynamic function and the rolling optimization method in the predictive control strategy, a discrete predictive sliding mode controller is synthesized. This new strategy is proposed to eliminate the undesirable effect of the delay term in the closed loop system. Also, the designed control strategy is more robust, and has a chattering reduction property and a faster convergence of the system s state. Finally, a numerical example is given to illustrate the effectiveness of the proposed control.

关键词： State time delay systems discrete sliding mode control model predictive control dynamic sliding function linear matrix inequalities (LMIs) chattering.

Efficacy of Essential Trace Elements Supplementation on Mineral Composition,Sperm Characteristics,Antioxidant Status,and Genotoxicity in Testis of Tebuconazole-treated Rats

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Biomedical and Environmental Sciences 2020年第10期33卷 760-770页

作者： Hajer ben SAAD Fatma ben ABDALLAH Intidhar BKHAIRIA Ons BOUDAWARA Moncef NASRI ahmed HAKIM Ibtissem ben AMARA Laboratory of Enzyme engineering and Microbiology National Engineering School in SfaxUniversity of SfaxB.P.11733038 SfaxTunisia Laboratory of Human Molecular Genetics Faculty of Medicine ofSfaxUniversity of SfaxTunisia Laboratory of Anatomopathology CHU Habib BourguibaUniversity of Sfax3029 SfaxTunisia Laboratory of Pharmacology Faculty of Medicine3029 SfaxUniversity of SfaxTunisia

Objective This research was performed to evaluate the effect of tebuconazole(TBZ)on reproductive organs of male rats and to assess the protective role of combined essential trace elements in alleviating the detrimental effect of TBZ on male reproductive *** For this purpose,48 rats were exposed to 100 mg/kg TBZ,TBZ supplemented with zinc(Zn),selenium(Se),copper(Cu),and iron(Fe),TBZ+(Se+Zn);TBZ+Cu;or TBZ+*** experiment was conducted for 30 consecutive *** TBZ caused a significant perturbation in mineral levels and reduction in reproductive organs weights,plasma testosterone level,and testicular antioxidant enzyme *** TBZ-treated group also showed a significant increase in sperm abnormalities(count,motility,and viability percent),plasma follicle-stimulating hormone and luteinizing hormone concentrations,lipid peroxidation,protein oxidation,and severe DNA degradation in comparison with the ***,TBZ caused testis ***,treatment with trace elements,in combination or alone,improved the reproductive organ weights,sperm characteristics,TBZ-induced toxicity,and histopathological modifications in *** TBZ exerts significant harmful effects on male reproductive *** concurrent administration of trace elements reduces testis dysfunction,fertility,and toxicity induced by TBZ.

关键词： Zinc Selenium Iron Copper Testicular toxicity

Metals and metalloid bioconcentrations in the tissues of Typha latifolia grown in the four interconnected ponds of a domestic landfill site

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Journal of Environmental Sciences 2017年第4期29卷 56-68页

作者： Zohra ben Salem Xavier Laffray ahmed Al-Ashoor Habib Ayadi Lotfi Aleya Bourgogne Franche-Comte University Chrono-Environnement Laboratory UMR CNRS 6249 F-25030 Besancon Cedex France Paris Est-Creteil University IPE team iEES Paris UMR 7618 F-94010 Creteil Cedex Prance Thi Qar University IQ-64001 AI Nasiriyah Iraq Sfax University LR/UR/05ES05 Biodiversity and Aquatic Ecosystem BP 1171 CP 3000 Sfax Tunisia

The uptake of metals in roots and their transfer to rhizomes and above-ground plant parts（stems, leaves） of cattails（Typha latifolia L.） were studied in leachates from a domestic landfill site（Etueffont, France） and treated in a natural lagooning system. Plant parts and corresponding water and sediment samples were taken at the inflow and outflow points of the four ponds at the beginning and at the end of the growing season. Concentrations of As, Cd, Cr, Cu, Fe, Mn, Ni and Zn in the different compartments were estimated and their removal efficiency assessed, reaching more than 90% for Fe, Mn and Ni in spring and fall as well in the water compartment. The above-and below-ground cattail biomass varied from 0.21 to 0.85, and 0.34 to 1.24 kg dry weight/m^2, respectively, the highest values being recorded in the fourth pond in spring 2011. The root system was the first site of accumulation before the rhizome, stem and leaves. The highest metal concentration was observed in roots from cattails growing at the inflow of the system＇s first pond. The trend in the average trace element concentrations in the cattail plant organs can generally be expressed as： Fe 〉 Mn 〉 As 〉 Zn 〉 Cr 〉 Cu 〉 Ni 〉 Cd for both spring and fall. While T. latifolia removes trace elements efficiently from landfill leachates, attention should also be paid to the negative effects of these elements on plant growth.

关键词： Landfill leachate Lagooning Trace elements Typha latifolia Phytoremediation