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arXiv 2020年

作者： Song, Young-Min Yoon, Young-Chul Yoon, Kwangjin Jeon, Moongu Lee, Seong-Whan Pedrycz, Witold The School of Electrical Engineering and Computer Science Gwangju Institute of Technology Gwangju61005 Korea Republic of The Robotics Laboratory Hyundai Motor Company Gyeonggi-do 16082 Korea Republic of SI Analytics Co. Ltd. Daejeon34051 Korea Republic of The Department of Artificial Intelligence Korea University Seoul02841 Korea Republic of The Department of Brain and Cognitive Engineering Korea University Seoul02841 Korea Republic of The Department of Electrical and Computer Engineering University of Alberta EdmontonABT6R 2H5 Canada The Department of Electrical and Computer Engineering Faculty of Engineering King Abdulaziz University Jeddah21589 Saudi Arabia The Systems Research Institute Polish Academy of Sciences Warsaw01-447 Poland

In this paper, we propose a highly practical fully online multi-object tracking and segmentation (MOTS) method that uses instance segmentation results as an input. The proposed method is based on the Gaussian mixture probability hypothesis density (GMPHD) filter, a hierarchical data association (HDA), and a mask-based affinity fusion (MAF) model to achieve high-performance online tracking. The HDA consists of two associations: segment-to-track and track-to-track associations. One affinity, for position and motion, is computed by using the GMPHD filter, and the other affinity, for appearance is computed by using the responses from a single object tracker such as a kernalized correlation filter. These two affinities are simply fused by using a score-level fusion method such as min-max normalization referred to as MAF. In addition, to reduce the number of false positive segments, we adopt mask IoU-based merging (mask merging). The proposed MOTS framework with the key modules: HDA, MAF, and mask merging, is easily extensible to simultaneously track multiple types of objects with CPU-only execution in parallel processing. In addition, the developed framework only requires simple parameter tuning unlike many existing MOTS methods that need intensive hyperparameter optimization. In the experiments on the two popular MOTS datasets, the key modules show some improvements. For instance, ID-switch decreases by more than half compared to a baseline method in the training sets. In conclusion, our tracker achieves state-of-the-art MOTS performance in the test sets. Copyright © 2020, The Authors. All rights reserved.

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Gaussian curvature filter on 3d mesh

arXiv

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arXiv 2020年

作者： Tang, Wenming Gong, Yuanhao Liu, Kanglin Liu, Jun Pan, Wei Liu, Bozhi Qiu, Guoping College of Information Engineering Shenzhen University Guangdong Key Laboratory of Intelligent Information Processing Shenzhen Institute of Artificial Intelligence and Robotics for Society Shenzhen China School of Mechanical & Automotive Engineering South China University of Technology Department of Research and Development OPT Machine Vision Tech Co. Ltd Jinsheng Road Changan Dongguan Guangdong523860 China School of Computer Science University of Nottingham NottinghamNG8 1BB United Kingdom

Minimizing Gaussian curvature of meshes is fundamentally important for obtaining smooth and developable surfaces. However, there is a lack of computationally efficient and robust Gaussian curvature optimization method. In this paper, we present a simple yet effective method that can efficiently reduce Gaussian curvature for 3D meshes. We first present the mathematical foundation of our method, which states that for any point on a developable surface there must be another point that lives on its tangent plane. Then, based on this theoretical insight, we introduce a simple and robust implicit Gaussian curvature optimization method named Gaussian Curvature Filter (GCF). GCF implicitly minimizes Gaussian curvature without the need to explicitly calculate the Gaussian curvature itself. GCF is highly efficient and is 20 times faster than the classical standard Gaussian curvature flow method. We present extensive experiments to demonstrate that GCF significantly outperforms state-of-the-art methods in minimizing Gaussian curvature, geometric feature preserving smoothing and mesh noise removal. This method can be used in a large range of applications that involve Gaussian curvature. Copyright © 2020, The Authors. All rights reserved.

关键词： Mesh generation

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A Hardware Trojan Attack on FPGA-Based Cryptographic Key Generation: Impact and Detection

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Journal of Hardware and systems Security 2018年第3期2卷 225-239页

作者： Vidya Govindan Rajat Subhra Chakraborty Pranesh Santikellur Aditya Kumar Chaudhary Secured Embedded Architecture Laboratory (SEAL) Department of Computer Science and Engineering Indian Institute of Technology Kharagpur Kharagpur India Centre for Artificial Intelligence and Robotics DRDO Complex Bangalore India

True Random Number Generator (TRNG) circuits are important components of cryptographic systems. Lack of statistical randomness in the generated bitstreams from a TRNG can result in compromised keys, leading to serious security breaches. In this paper, we describe a Hardware Trojan Horse (HTH)-based attack on the TRNG of an FPGA-based cryptosystem, that results in reduced entropy and increased predictability of the generated keys. The proposed HTH does not cause any functional failure in the cryptosystem, and its impact is undetectable by analysis of the compromised bitstream using standard statistical randomness testing software suites (NIST, two enhanced versions of NIST Dieharder, and LIL-tests), and by a circuit-level HTH detection technique using Transition Effect Ring Oscillator (TERO). Finally, we show that the impact of the HTH can be detected by applying Wavelet Transform on the compromised bitstream.

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METHODS of EXTRACTING ELECTROCARDIOGRAMS from ELECTRONIC SIGNALS and IMAGES in the PYTHON ENVIRONMENT

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Diagnostyka 2020年第3期21卷 95-101页

作者： Zholmagambetova, Bakhytgul Mazakov, Talgat Jomartova, Sholpan Izat, Adilzhan Bibalayev, Olzhas Department of Information Technology and Security Karaganda State Technical University Shakhtarov Avenue 70-191 Karaganda100000 Kazakhstan Department of Computer Science Al-Farabi Kazakh National University Zhanar st. 37a1 Almaty500045 Kazakhstan Department of Artificial Intelligence and Big Data Al-Farabi Kazakh National University Zhanar st. 37a1 Almaty500045 Kazakhstan Department of Applied Mathematics and Computer Science Karaganda State University named after Academician E. A. Buketov Shakhtarov Avenue 70-191 Karaganda100000 Kazakhstan Department of Robotics and Intelligent Machine Scientific Research Laboratory Karaganda State University named after Academician E. A. Buketov Satybaldina str. 16-53 Karaganda100000 Kazakhstan

High-quality signal processing of an electrocardiogram (ECG) is an urgent problem in present day diagnostics for revealing dangerous signs of cardiovascular diseases and arrhythmias in patients. The used methods and programs of signal analysis and classification work with the arrays of points for mathematical modeling that must be extracted from an image or recording of an electrocardiogram. The aim of this work is developing a method of extracting images of ECG signals into a one-dimensional array. An algorithm is proposed based on sequential color processing operations and improving the image quality, masking and building a one-dimensional array of points using Python tools and libraries with open access. The results of testing samples from the ECG database and comparing images before and after processing show that the signal extraction accuracy is approximately 95 %. In addition, the presented application design is simple and easy to use. The proposed program for analyzing and processing the ECG data has a great potential in the future for the development of more complex software applications for automatic analyzing the data and determining arrhythmias or other pathologies. © 2020 Polish Society of Technical Diagnostics. All rights reserved.

关键词： Electrocardiograms

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Metrics Reloaded: Recommendations for image analysis validation

arXiv

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arXiv 2022年

作者： Maier-Hein, Lena Reinke, Annika Godau, Patrick Tizabi, Minu D. Buettner, Florian Christodoulou, Evangelia Glocker, Ben Isensee, Fabian Kleesiek, Jens Kozubek, Michal Reyes, Mauricio Riegler, Michael A. Wiesenfarth, Manuel Emre Kavur, A. Sudre, Carole H. Baumgartner, Michael Eisenmann, Matthias Heckmann-Nötzel, Doreen Rädsch, Tim Acion, Laura Antonelli, Michela Arbel, Tal Bakas, Spyridon Benis, Arriel Blaschko, Matthew B. Jorge Cardoso, M. Cheplygina, Veronika Cimini, Beth A. Collins, Gary S. Farahani, Keyvan Ferrer, Luciana Galdran, Adrian Ginneken, Bram Van Haase, Robert Hashimoto, Daniel A. Hoffman, Michael M. Huisman, Merel Jannin, Pierre Kahn, Charles E. Kainmueller, Dagmar Kainz, Bernhard Karargyris, Alexandros Karthikesalingam, Alan Kenngott, Hannes Kofler, Florian Kopp-Schneider, Annette Kreshuk, Anna Kurc, Tahsin Landman, Bennett A. Litjens, Geert Madani, Amin Maier-Hein, Klaus Martel, Anne L. Mattson, Peter Meijering, Erik Menze, Bjoern Moons, Karel G.M. Müller, Henning Nichyporuk, Brennan Nickel, Felix Petersen, Jens Rajpoot, Nasir Rieke, Nicola Saez-Rodriguez, Julio Sánchez, Clara I. Shetty, Shravya Smeden, Maarten Van Summers, Ronald M. Taha, Abdel A. Tiulpin, Aleksei Tsaftaris, Sotirios A. Calster, Ben Van Varoquaux, Gaël Jäger, Paul F. Heidelberg Division of Intelligent Medical Systems and HI Helmholtz Imaging Germany Faculty of Mathematics and Computer Science and Medical Faculty Heidelberg University Heidelberg Germany NCT Heidelberg a partnership between DKFZ University Medical Center Heidelberg Germany Faculty of Mathematics and Computer Science Heidelberg University Heidelberg Germany Heidelberg Division of Intelligent Medical Systems Germany partner site Frankfurt/Mainz a partnership between DKFZ and UCT Frankfurt-Marburg Germany Heidelberg Goethe University Frankfurt Germany Department of Medicine Goethe University Frankfurt Germany Department of Informatics Frankfurt Cancer Insititute Germany Department of Computing Imperial College London London United Kingdom Heidelberg Division of Medical Image Computing and HI Applied Computer Vision Lab Germany Institute for AI in Medicine University Medicine Essen Essen Germany Centre for Biomedical Image Analysis Faculty of Informatics Masaryk University Brno Czech Republic ARTORG Center for Biomedical Engineering Research University of Bern Bern Switzerland Department of Radiation Oncology University Hospital Bern University of Bern Bern Switzerland Simula Metropolitan Center for Digital Engineering Oslo Norway UiT The Arctic University of Norway Romsø Norway Heidelberg Division of Biostatistics Germany Heidelberg Division of Intelligent Medical Systems Division of Medical Image Computing HI Applied Computer Vision Lab Germany MRC Unit for Lifelong Health and Ageing UCL Centre for Medical Image Computing Department of Computer Science University College London London United Kingdom School of Biomedical Engineering and Imaging Science King’s College London London United Kingdom Heidelberg Division of Medical Image Computing Germany Instituto de Cálculo CONICET – Universidad de Buenos Aires Buenos Aires Argentina Centre for Medical Image Computing University College London London United Kingdom McGill University Montréal

Increasing evidence shows that flaws in machine learning (ML) algorithm validation are an underestimated global problem. Particularly in automatic biomedical image analysis, chosen performance metrics often do not reflect the domain interest, thus failing to adequately measure scientific progress and hindering translation of ML techniques into practice. To overcome this, we created Metrics Reloaded, a comprehensive framework guiding researchers in the problem-aware selection of metrics. It was developed by a large international consortium in a multi-stage Delphi process and is based on the novel concept of a problem fingerprint – a structured representation of the given problem that captures all aspects that are relevant for metric selection, from the domain interest to the properties of the target structure(s), data set and algorithm output. Based on the problem fingerprint, users are guided through the process of choosing and applying appropriate validation metrics while being made aware of potential pitfalls. Metrics Reloaded targets image analysis problems that can be interpreted as a classification task at image, object or pixel level, namely image-level classification, object detection, semantic segmentation, and instance segmentation tasks. To improve the user experience, we implemented the framework in the Metrics Reloaded online tool. Following the convergence of ML methodology across application domains, Metrics Reloaded fosters the convergence of validation methodology. Its applicability is demonstrated for various biomedical use cases. © 2022, CC BY.

关键词： Semantic Segmentation

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Particle swarm and population structure 18

Particle swarm and population structure

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2018 Genetic and Evolutionary Computation Conference, GECCO 2018

作者： Fernandes, Carlos M. Rosa, Agostinho C. Fachada, Nuno Laredo, J.L.J. Merelo, J.J. LARSyS: Laboratory for Robotics and Systems in Engineering and Science University of Lisbon Portugal HEI-LAB - Digital Human-Environment and Interactions Labs Universidade Lusófona Lisbon Portugal LITIS University of Le Havre Le Havre France Department of Computer Architecture University of Granada Granada Spain

ISBN: (纸本)9781450357647

We investigate the convergence speed, accuracy, robustness and scalability of PSOs structured by regular and random graphs with 3 ≤ k ≤ n. The main conclusion is that regular and random graphs with the same averaged connectivity may result in significantly different performance, namely when is low. © 2018 Copyright is held by the owner/author(s).

关键词： Particle swarm optimization (PSO)

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Associations between Aβ deposition and neurometabolic alterations in Alzheimer's disease: Insights from hybrid 3D MRSI-PET imaging

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Alzheimer's & dementia : the journal of the Alzheimer's Association 2025年第6期21卷 e70332页

作者： Miao Zhang Jialin Hu Yaoyu Zhang Ziyu Meng Yibo Zhao Yudu Li Wen Jin Xiao-Hang Qian Lijun Wang Guanyu Ye Xu-Feng Jiang Ya-Dong Li Jian Ye Huidong Tang Jun Liu Parashkev Nachev Zhi-Pei Liang Biao Li Yao Li Department of Nuclear Medicine Ruijin Hospital School of Biomedical Engineering Shanghai Jiao Tong University Shanghai China. National Engineering Research Center of Advanced Magnetic Resonance Technologies for Diagnosis and Therapy Shanghai Jiao Tong University Shanghai China. Institute of Medical Robotics Shanghai Jiao Tong University Shanghai China. Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana Illinois USA. Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Urbana Illinois USA. National Center for Supercomputing Applications University of Illinois at Urbana-Champaign Urbana Illinois USA. Department of Geriatrics Ruijin Hospital Shanghai Jiao Tong University School of Medicine Shanghai China. Medical Center on Aging of Ruijin Hospital Shanghai Jiao Tong University School of Medicine Shanghai China. Department of Neurology and Institute of Neurology Ruijin Hospital Shanghai Jiao Tong University School of Medicine Shanghai China. Department of Neurovascular Center Changhai Hospital Naval Medical University Shanghai China. Department of Gastroenterology Songjiang Hospital and Songjiang Research Institute Shanghai Key Laboratory of Emotions and Affective Disorders State Key Laboratory of Eye Health Shanghai Jiao Tong University School of Medicine Shanghai China. Shanghai Key Laboratory of Gynecologic Oncology Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai China. High-Dimensional Neurology Group Institute of Neurology University College London London UK.

INTRODUCTION:Understanding the neurometabolic changes associated with amyloid-β (Aβ) deposition is important for early Alzheimer's disease (AD) diagnosis, but their spatial relationships remained unexplored due to technical limitations. METHODS:We investigated the relationship between Aβ deposition and neuronal and glial metabolites using high-resolution 3D magnetic resonance spectroscopic imaging (MRSI) (8-min scan, 2 × 3 × 3 mm resolution) and Aβ-positron emission tomography (Aβ-PET) imaging. N-acetylaspartate, myo-inositol, and creatine maps were obtained from 174 participants: 39 controls, 65 mild cognitive impairment (MCI), and 70 AD patients. RESULTS:N-Acetylaspartate levels were negatively correlated with Aβ, while myo-inositol levels were positively correlated globally. Regional associations with Aβ include N-acetylaspartate reductions in frontal cortex, anterior cingulate cortex, and precuneus, and myo-inositol increases in precuneus, lateral temporal, and lateral parietal cortices. Combined MRSI and PET biomarkers achieved the highest diagnostic accuracy for MCI and AD . DISCUSSION:Hybrid high-resolution 3D MRSI and Aβ-PET imaging provides valuable insights into Aβ's impact on neurometabolic changes, improving early AD diagnosis. HIGHLIGHTS:Hybrid 3D magnetic resonance spectroscopic imaging-positron emission tomography (MRSI-PET) imaging reveals Aβ deposition impact on neurometabolism in Alzheimer's disease (AD). N-acetylaspartate (NAA) as a neuronal metabolic marker is negatively associated with Aβ globally and locally. Myo-inositol (mI) as a glial metabolic marker is positively associated with Aβ globally and locally. Combining 3D magnetic resonance spectroscopic imaging (MRSI) and PET biomarkers improves diagnostic accuracy for mild cognitive impairment (MCI) and AD.

关键词： alzheimer's disease amyloid‐β magnetic resonance spectroscopic imaging myo‐inositol n‐acetylaspartate

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Design optimization of a cable-driven parallel robot in upper arm training-rehabilitation processes 6th

Design optimization of a cable-driven parallel robot in uppe...

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6th International Symposium on Multibody systems and Mechatronics, MuSMe 2017

作者： Hernandez, Eusebio Valdez, S. Ivvan Carbone, Giuseppe Ceccarelli, Marco Secc. de Estudios de Posgrado e Investigacion ESIME UP TICOMAN IPN Mexico City Mexico Department of Computer Science Center for Research in Mathematics Mexico City Mexico Laboratory of Robotics and Mechatronics University of Cassino and Southern Lazio Meridionale Cassino Italy

ISBN: (纸本)9783319675664

This paper presents an optimized design of a cable driven parallel manipulator which is intended in rehabilitation or exercise of patients with shoulder problems like illness, traumatic events or for the elderly who need to exercise their limbs. Cable based parallel manipulators have characteristics that make them suitable for rehabilitation-exercise purposes like large workspace, re-configurable architecture, portability and low cost. From these purposes, upper-limb movements are analyzed and different prescribed workspaces are defined. After kinematic and wrench analysis, the Jacobian matrix of the cable driven manipulator is derived, which is used as a quantitative representation of dexterity along the workspace. An optimization model is presented to simultaneously fulfill the prescribed workspace and to improve dexterity by selecting proper length cables and other structural parameters. Numerical examples delineate effectiveness of an Estimation of Distribution Algorithm (EDA), where correlation among variables are inserted in the optimization process. © 2018, Springer International Publishing AG.

关键词： Cables

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Dynamic Fusion of Electromyographic and Electroencephalographic Data towards Use in Robotic Prosthesis Control

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Journal of Physics: Conference Series 2021年第1期1828卷

作者： Michael Pritchard Abraham Itzhak Weinberg John A R Williams Felipe Campelo Harry Goldingay Diego R Faria Aston Robotics Vision and Intelligent Systems Laboratory (ARVIS Lab) College of Engineering and Physical Sciences Aston University Birmingham B4 7ET UK Department of Computer Science College of Engineering and Physical Sciences Aston University Birmingham B4 7ET UK Aston Institute of Photonic Technologies Aston University Birmingham B4 7ET UK

We demonstrate improved performance in the classification of bioelectric data for use in systems such as robotic prosthesis control, by data fusion using low-cost electromyography (EMG) and electroencephalography (EEG) devices. Prosthetic limbs are typically controlled through EMG, and whilst there is a wealth of research into the use of EEG as part of a brain-computer interface (BCI) the cost of EEG equipment commonly prevents this approach from being adopted outside the lab. This study demonstrates as a proof-of-concept that multimodal classification can be achieved by using low-cost EMG and EEG devices in tandem, with statistical decision-level fusion, to a high degree of accuracy. We present multiple fusion methods, including those based on Jensen-Shannon divergence which had not previously been applied to this problem. We report accuracies of up to 99% when merging both signal modalities, improving on the best-case single-mode classification. We hence demonstrate the strengths of combining EMG and EEG in a multimodal classification system that could in future be leveraged as an alternative control mechanism for robotic prostheses.

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In-transit metastatic lymph nodes in cervical cancer: A new staging and therapeutic concept

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European journal of obstetrics, gynecology, and reproductive biology 2025年 312卷 114523页

作者： Matteo Pavone Nicolò Bizzarri Agnieszka Rychlik Jan Persson Anna Fagotti Francesco Fanfani Giovanni Scambia Denis Querleu UOC Ginecologia Oncologica Dipartimento di Scienze per la salute della Donna e del Bambino e di Sanità Pubblica Fondazione Policlinico Universitario A. Gemelli IRCCS Rome Italy IHU Strasbourg Institute of Image-Guided surgery Strasbourg France ICube Laboratory of Engineering Computer Science and Imaging Department of Robotics Imaging Teledetection and Healthcare Technologies University of Strasbourg CNRS UMR 7357 Strasbourg France Research Institute against Digestive Cancer IRCAD Strasbourg France. UOC Ginecologia Oncologica Dipartimento di Scienze per la salute della Donna e del Bambino e di Sanità Pubblica Fondazione Policlinico Universitario A. Gemelli IRCCS Rome Italy. Electronic address: nicolo.bizzarri@***. Department of Gynecologic Oncology National Research Institute of Oncology Warsaw Poland. Department of Obstetrics and Gynaecology Skåne University Hospital Lund University Faculty of Medicine Clinical Sciencies Obstetrics and Gynecology Lund Sweden. Università Cattolica del Sacro Cuore Rome Italy.

OBJECTIVE:It has been reported that metastatic lymph nodes can be present in the parauterine lymphovascular (PULT) and in lateral paracervical lymphatic tissue as in-transit disease in patients with cervical cancer. This study aimed to clarify the understanding of in-transit positive lymph nodes in PULT and lateral paracervix and its clinical management in patients with cervical cancer, based on insights gathered from an international expert survey. METHODS:A 29-question survey was emailed to experts identified through a systematic literature search related to sentinel lymph nodes in gynecological cancer. The survey was divided into four sections: 1. Resection of parauterine lymphovascular tissue; 2. Discontinuous lymphatic paracervical involvement; 3. Positive para-uterine or paracervical nodes in fertility-sparing surgery; 4. The impact of positive in-transit nodes on the extent of nodal staging. Consensus was defined as an agreement among at least 70% of the respondents. RESULTS:Responders where only corresponding or last authors of articles addressing sentinel lymph nodes procedures. Results show general agreement on referring to the areas as "para-uterine lymphovascular tissue (PULT)" (84.85 %), with lymph nodes in these regions considered sentinel nodes if stained with indocyanine green (80 %). However, there is no consensus on surgical staging for isolated positive lymph nodes. Most respondents favour adjuvant treatment for in-transit macro or micrometastases (>95 %) but acknowledge the lack of conclusive evidence. In fertility-sparing settings, most would remove PULT while preserving uterine arteries (59 %) and would remove lateral paracervical tissue in low-risk cases (66.7 %). For isolated metastasis, most would recommend chemoradiation over fertility-sparing options (81.8 %). Finally, if a positive in-transit node is found, experts would request additional imaging (80.3 %), though there is no consensus on aortic lymphatic dissection or extended-field radi

关键词： Cervical cancer Intransit nodes Lateral paracervical lymphatic tissue Parauterine lymphovascular tissue Sentinel lymph node

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