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arXiv 2021年

作者： Wang, Shoucheng Chen, Bingqiu Ma, Jun Long, Qian Yuan, Haibo Liu, Dezi Zhou, Zhimin Liu, Wei Chen, Jiamin He, Zizhao Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China South-Western Institute for Astronomy Research Yunnan University Yunnan Kunming650091 China School of Astronomy and Space Sciences University of Chinese Academy of Sciences Beijing100049 China Yunnan Observatories Chinese Academy of Sciences Kunming650216 China Department of Astronomy Beijing Normal University Beijing100875 China National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing100190 China School of Computer Science and Engineering Central South University Changsha410083 China Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China

Context. Identification of new star cluster candidates in M31 is fundamental for the study of the M31 stellar cluster system. The machine-learning method convolutional neural network (CNN) is an efficient algorithm for searching for new M31 star cluster candidates from tens of millions of images from wide-field photometric surveys. Aims. We search for new M31 cluster candidates from the high-quality g- and i-band images of 21,245,632 sources obtained from the Pan-Andromeda Archaeological Survey (PAndAS) through a CNN. Methods. We collected confirmed M31 clusters and noncluster objects from the literature as our training sample. Accurate double-channel CNNs were constructed and trained using the training samples. We applied the CNN classification models to the PAndAS g- and i-band images of over 21 million sources to search new M31 cluster candidates. The CNN predictions were finally checked by five experienced human inspectors to obtain high-confidence M31 star cluster candidates. Results. After the inspection, we identified a catalogue of 117 new M31 cluster candidates. Most of the new candidates are young clusters that are located in the M31 disk. Their morphology, colours, and magnitudes are similar to those of the confirmed young disk clusters. We also identified eight globular cluster candidates that are located in the M31 halo and exhibit features similar to those of confirmed halo globular clusters. The projected distances to the M31 centre for three of them are larger than 100 kpc. Copyright © 2021, The Authors. All rights reserved.

关键词： Sampling

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NTIRE 2022 Challenge on Stereo Image Super-Resolution: Methods and Results

arXiv

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arXiv 2022年

作者： Guo, Yulan Wang, Longguang Wang, Yingqian Li, Juncheng Gu, Shuhang Timofte, Radu Chen, Liangyu Chu, Xiaojie Yu, Wenqing Jin, Kai Wei, Zeqiang Guo, Sha Yang, Angulia Zhou, Xiuzhuang Guo, Guodong Xiao, Huaxin Yan, Shen Liu, Yuxiang Cai, Hanxiao Dai, Bin Peng, Feiyue Cao, Pu Nie, Yang Yang, Lu Song, Qing Hu, Xiaotao Xu, Jun Xu, Mai Jing, Junpeng Deng, Xin Xing, Qunliang Qiao, Minglang Guan, Zhenyu Guo, Wenlong Peng, Chenxu Chen, Zan Chen, Junyang Li, Hao Chen, Junbin Li, Weijie Yang, Zhijing Li, Gen Li, Aijin Sun, Lei Zhang, Dafeng Liu, Shizhuo Zhang, Jiangtao Qu, Yanyun Yang, Hao-Hsiang Huang, Zhi-Kai Chen, Wei-Ting Chang, Hua-En Kuo, Sy-Yen Liang, Qiaohui Lin, Jianxin Wang, Yijun Yin, Lianying Zhang, Rongju Zhao, Wei Xiao, Peng Xu, Rongjian Zhang, Zhilu Zuo, Wangmeng Guo, Hansheng Gao, Guangwei Zeng, Tieyong Kim, Joohyeok Kim, HyeonA Park, Eunpil Sim, Jae-Young Pi, Huicheng Zhang, Shunli Zhai, Jucai Zeng, Pengcheng Liu, Yang Ma, Chihao Huang, Yulin Chen, Junying National University of Defense Technology China The Chinese University of Hong Kong Hong Kong The University of Sydney Australia University of Würzburg ETH Zürich Switzerland MEGVII Technology China Peking University China Bigo Technology Pte. Ltd Singapore Smart Healthcare Innovation Lab Beijing University of Posts and Telecommunications China School of Artificial Intelligence Beijing University of Posts and Telecommunications China Head of Institute of Deep Learning Baidu Research College of Systems Engineering National University of Defense Technology China College of Liberal Arts and Sciences National University of Defense Technology China Pattern Recognition and Intelligent Vision Lab Beijing University of Posts and Telecommunications China College of Computer Science Nankai University Tianjin China School of Statistics and Data Science Nankai University Tianjin Singapore Beihang University China Zhejiang University of Technology China Guangdong University of Technology China Tencent OVBU SRC-B Xiamen University China Department of Electrical Engineering National Taiwan University Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taiwan College of Computer Science and Electronic Engineering Hunan University China Harbin Institude of Technology China The Chinese University of Hong Kong Hong Kong Nanjing University of Posts and Telecommunications China Department of Electrical Engineering Ulsan National Institute of Science and Technology Korea Republic of Graduate School of Artificial Intelligence Ulsan National Institute of Science and Technology Korea Republic of Beijing Jiaotong University China City University of Hong Kong Hong Kong South China University of Technology China

In this paper, we summarize the 1st NTIRE challenge on stereo image super-resolution (restoration of rich details in a pair of low-resolution stereo images) with a focus on new solutions and results. This challenge has 1 track aiming at the stereo image super-resolution problem under a standard bicubic degradation. In total, 238 participants were successfully registered, and 21 teams competed in the final testing phase. Among those participants, 20 teams successfully submitted results with PSNR (RGB) scores better than the baseline. This challenge establishes a new benchmark for stereo image SR. Copyright © 2022, The Authors. All rights reserved.

关键词： Stereo image processing

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Independence promoted graph disentangled networks

arXiv

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arXiv 2019年

作者： Liu, Yanbei Wang, Xiao Wu, Shu Xiao, Zhitao School of Life Sciences Tiangong University School of Computer Science Beijing University of Posts and Telecommunications Center for Research on Intelligent Perception and Computing National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences

We address the problem of disentangled representation learning with independent latent factors in graph convolutional networks (GCNs). The current methods usually learn node representation by describing its neighborhood as a perceptual whole in a holistic manner while ignoring the entanglement of the latent factors. However, a real-world graph is formed by the complex interaction of many latent factors (e.g., the same hobby, education or work in social network). While little effort has been made toward exploring the disentangled representation in GCNs. In this paper, we propose a novel Independence Promoted Graph Disentangled Networks (IPGDN) to learn disentangled node representation while enhancing the independence among node representations. In particular, we firstly present disentangled representation learning by neighborhood routing mechanism, and then employ the Hilbert-Schmidt Independence Criterion (HSIC) to enforce independence between the latent representations, which is effectively integrated into a graph convolutional framework as a regularizer at the output layer. Experimental studies on real-world graphs validate our model and demonstrate that our algorithms outperform the state-of-the-arts by a wide margin in different network applications, including semi-supervised graph classification, graph clustering and graph visualization. Copyright © 2019, The Authors. All rights reserved.

关键词： Convolution

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Age Estimation using Disconnectedness Features in Handwriting

Age Estimation using Disconnectedness Features in Handwritin...

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International Conference on Document Analysis and recognition

作者： V. Basavaraja Palaiahnakote Shivakumara D. S. Guru Umapada Pal Tong Lu Michael Blumenstein Department of Studies in Computer Science University of Mysore Mysore Karnataka India Faculty of Computer System and Information Technology University of Malaya Kuala Lumpur Malaysia Computer Vision and Pattern Recognition Unit Indian Statistical Institute Kolkata India National Key Lab for Novel Software Technology Nanjing University Nanjing China University of Technology Sydney Australia

Real-time applications of handwriting analysis have increased drastically in the fields of forensic and information security because of accurate cues. One of such applications is human age estimation based on handwriting for the purpose of immigrant checking. In this paper, we have proposed a new method for age estimation using handwriting analysis using Hu invariant moments and disconnectedness features. To make the proposed method robust to both ruled and un-ruled documents, we propose to explore intersection point detection in Canny edge images of each input document, which results in text components. For each text component pair, we propose Hu invariant moments for extracting disconnectedness features, which in fact measure multi-shape components based on distance, shape and mutual position analysis of components. Furthermore, iterative k-means clustering is proposed for the classification of different age groups. Experimental results on our dataset and some standard datasets, namely, IAM and KHATT, show that the proposed method is effective and outperforms the state-of-the-art methods.

关键词： Image edge detection Estimation Shape Feature extraction Writing Mathematical model Shape measurement

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Frangi-net

Frangi-net

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Workshop on Bildverarbeitung fur die Medizin, 2018

作者： Fu, Weilin Breininger, Katharina Schaffert, Roman Ravikumar, Nishant Würfl, Tobias Fujimoto, Jim Moult, Eric Maier, Andreas Pattern Recognition Lab Department of Computer Science Friedrich-Alexander-University Erlangen-Nuremberg Erlangen Germany Erlangen Germany Department Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge United States

ISBN: (纸本)9783662580950

In this paper, we reformulate the conventional 2-D Frangi vesselness measure into a pre-weighted neural network ("Frangi-Net"), and illustrate that the Frangi-Net is equivalent to the original Frangi filter. Furthermore, we show that, as a neural network, Frangi-Net is trainable. We evaluate the proposed method on a set of 45 high resolution fundus images. After fine-tuning, we observe both qualitative and quantitative improvements in the segmentation quality compared to the original Frangi measure, with an increase up to 17% in F1 score. © Springer-Verlag GmbH Deutschland 2018.

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An improved convex programming model for the inverse problem in intensity-modulated radiation therapy

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International Journal of Performability Engineering 2018年第5期14卷 871-884页

作者： Lan, Yihua Zhang, Xingang Zhang, Jianyang Wang, Yang Hung, Chih-Cheng School of Computer and Information Technology Nanyang Normal University Nanyang473061 China Institute of Image Processing and Pattern Recognition Nanyang Normal University Nanyang473061 China Radiology Department Central Hospital of Nanyang Nanyang473061 China Laboratory for Machine Vision and Security Research College of Computing and Software Engineering Kennesaw State University - Marietta Campus 1100 South Marietta Parkway MariettaGA30067-2896 United States

Intensity modulated radiation therapy technology (IMRT) is one of the main approaches in cancer treatment because it can guarantee the killing of cancer cells while optimally protecting normal tissue from complications. Inverse planning, which is the core component of the entire IMRT system, is mainly based on accurate mathematical modeling and associated fast solving methods. In inverse planning, the fluence map optimization, which considers the multi-leaf collimator (MLC) modulation, is the current research focus. Although the hitting constrain problem with the unidirectional movement of leaf-sweeping has been solved, our goal is to solve the hitting constrain problem with the bidirectional movement of leaf-sweeping. In this study, we propose a non-synchronized type to solve the hitting constrain problem with the bidirectional movement of leaf-sweeping schemes for IMRT. In solving this problem, a new mathematical model is proposed under the framework of convex programming. The advantage of the convex model is to avoid the uncertainty and inaccuracy that occurs in the non-convex programming solving process. Experimental results for two clinical testing cases show that under the same condition of total number of monitoring units, the new proposed model produces better dose distribution than those of the total variance and quadratic models. © 2018 Totem Publisher, Inc. All rights reserved.

关键词： Convex optimization

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QuaSI – Quantile sparse image: A prior for spatio-temporal denoising of retinal OCT data

QuaSI – Quantile sparse image: A prior for spatio-temporal ...

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Workshop on Bildverarbeitung fur die Medizin, 2018

作者： Schirrmacher, Franziska Köhler, Thomas Husvogt, Lennart Fujimoto, James G. Hornegger, Joachim Maier, Andreas K. Pattern Recognition Lab Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Germany Department of Electrical Engineering & Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge United States

Optical Coherence Tomography (OCT) is a standard non-invasive imaging modality widely used in opthalmology. Due to its high spatial resolution OCT has become a standard imaging technique. However, speckle noise caused... 详细信息

ISBN: (纸本)9783662580950

关键词： Optical tomography

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A robust scheme for extraction of text lines from handwritten documents

A robust scheme for extraction of text lines from handwritte...

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International Conference on computer vision and Image Processing, CVIP 2016

作者： Biswas, Barun Bhattacharya, Ujjwal Chaudhuri, Bidyut B. Computer Vision and Pattern Recognition Unit Indian Statistical Institute Kolkata108 India

ISBN: (纸本)9789811021060

Considering the vast collection of handwritten documents in various archives, research studies for their automatic processing have major impact in the society. Line segmentation from images of such documents is a crucial step. The problem is more difficult for documents of major Indian scripts such as Bangla because a large number of its characters have either ascender or descender or both and the majority of its writers are accustomed in extremely cursive handwriting. In this article, we describe a novel strip based text line segmentation method for handwritten documents of ***, the proposed method has been found to perform efficiently on English and Devanagari handwritten *** conducted extensive experimentations and its results show the robustness of the proposed approach on multiple scripts. © Springer Science+Business Media Singapore 2017.

关键词： Image segmentation

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Global, regional, and national burden of asthma and atopic dermatitis, 1990–2021, and projections to 2050: a systematic analysis of the Global Burden of Disease Study 2021

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The Lancet Respiratory Medicine 2025年第5期13卷 425-446页

作者： Oh, Jiyeon Kim, Soeun Kim, Min Seo Abate, Yohannes Habtegiorgis Abd ElHafeez, Samar Abdelkader, Atef Abdi, Parsa Abdulah, Deldar Morad Aboagye, Richard Gyan Abolhassani, Hassan Abtahi, Dariush Abualruz, Hasan Abu-Gharbieh, Eman Aburuz, Salahdein Adane, Mesafint Molla Addo, Isaac Yeboah Adeleke, Olumide Thomas Aden, Bashir Adnani, Qorinah Estiningtyas Sakilah Adra, Saryia Afzal, Muhammad Sohail Ahmad, Sajjad Ahmad, Tauseef Ahmadi, Ali Ahmed, Syed Anees Al Awaidy, Salah Al Bakour, Mohamad Anas Alam, Khurshid Albashtawy, Mohammed Al-Eyadhy, Ayman Al-Gheethi, Adel Ali Saeed Alhalaiqa, Fadwa Naji Ali, Syed Shujait Ali, Waad Alif, Sheikh Mohammad Al-Jabi, Samah W. Alqahtani, Jaber S. AlQudah, Mohammad Alrawashdeh, Ahmad Alshahrani, Najim Z. Altaany, Zaid Altaf, Awais Al-Tammemi, Alaa B. Altirkawi, Khalid A. Alvis-Guzman, Nelson Alwafi, Hassan Al-Wardat, Mohammad Al-Worafi, Yaser Mohammed Aly, Hany Alyahya, Mohammad Sharif Ibrahim Alzoubi, Karem H. Amusa, Ganiyu Adeniyi Ansar, Adnan Anuoluwa, Boluwatife Stephen Anuoluwa, Iyadunni Adesola Anyasodor, Anayochukwu Edward Arabloo, Jalal Aravkin, Aleksandr Y. Areda, Demelash Asghari-Jafarabadi, Mohammad Ashraf, Tahira Athari, Seyyed Shamsadin Aujayeb, Avinash Ayana, Lemessa Assefa A. Aziz, Shahkaar Azzam, Ahmed Y. Barqawi, Hiba Jawdat Barrow, Amadou Bastan, Mohammad-Mahdi Batra, Kavita Behera, Priyamadhaba Behzadi, Payam Bell, Michelle L. Beneke, Alice A. Berhie, Alemshet Yirga Beyene, Kebede A. Bhattacharjee, Priyadarshini Bhatti, Jasvinder Singh Bolarinwa, Obasanjo Afolabi Bouaoud, Souad Bustanji, Yasser Butt, Nadeem Shafique Camargos, Paulo Cámera, Luis Alberto Carugno, Andrea Cenderadewi, Muthia Cerrai, Sonia Chakraborty, Sandip Chan, Jeffrey Shi Kai Chandika, Rama Mohan Chattu, Vijay Kumar Chaudhary, Anis Ahmad Cheng, Esther T. W. Chichagi, Fatemeh Chimoriya, Ritesh Ching, Patrick R. Chirinos-Caceres, Jesus Lorenzo Chong, Yuen Yu Chopra, Hitesh Chu, Dinh-Toi Corlateanu, Alexandru Cruz-Martins, Natalia da Silva, Alanna Gomes Dababo, Nour Dadras, Omid Dai, Xiaochen Damiani Department of Medicine Kyung Hee University College of Medicine Seoul South Korea Center for Digital Health Kyung Hee University College of Medicine Seoul South Korea Broad Institute of MIT and Harvard Cambridge MA United States Massachusetts General Hospital Boston MA United States Department of Clinical Governance and Quality Improvement Aleta Wondo General Hospital Aleta Wondo Ethiopia Department of Epidemiology Alexandria University Alexandria Egypt Department of Mathematics and Sciences Ajman University Ajman United Arab Emirates Department of Medicine Memorial University St John's NL Canada Community and Maternity Nursing Unit University of Duhok Duhok Iraq Department of Family and Community Health University of Health and Allied Sciences Ho Ghana Research Center for Immunodeficiencies Tehran Iran Department of Medical Biochemistry and Biophysics Karolinska Institute Stockholm Sweden Department of Anesthesiology Shahid Beheshti University of Medical Sciences Tehran Iran Department of Nursing Al Zaytoonah University of Jordan Amman Jordan Department of Clinical Sciences Sharjah United Arab Emirates Department of Biopharmaceutics and Clinical Pharmacy University of Jordan Amman Jordan College of Pharmacy University of Jordan Amman Jordan Department of Pharmacology and Therapeutics Al Ain United Arab Emirates College of Medicine and Health Sciences Bahir Dar University Bahir Dar Ethiopia School of Medicine University of Sydney Sydney NSW Australia Centre for Social Research in Health University of New South Wales Sydney NSW Australia Department of Family Medicine Bowen University Iwo Nigeria Bowen University Teaching Hospital Ogbomoso Nigeria United Arab Emirates University Al Ain United Arab Emirates Institute of Public Health Walden University Al Ain United Arab Emirates Department of Public Health Padjadjaran University (Universitas Padjadjaran) Bandung Indonesia Clinical Sciences Department Sharjah United Arab Emirates Department

Background: Asthma and atopic dermatitis are common allergic conditions that contribute to substantial health loss, economic burden, and pain across individuals of all ages worldwide. Therefore, as a component of the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021, we present updated estimates of the prevalence, disability-adjusted life-years (DALYs), incidence, and deaths due to asthma and atopic dermatitis and the burden attributable to modifiable risk factors, with forecasted prevalence up to 2050. Methods: Asthma and atopic dermatitis prevalence, incidence, DALYs, and mortality, with corresponding 95% uncertainty intervals (UIs), were estimated for 204 countries and territories from 1990 to 2021. A systematic review identified data from 389 sources for asthma and 316 for atopic dermatitis, which were further pooled using the Bayesian meta-regression tool. We also described the age-standardised DALY rates of asthma attributable to four modifiable risk factors: high BMI, occupational asthmagens, smoking, and nitrogen dioxide pollution. Furthermore, as a secondary analysis, prevalence was forecasted to 2050 using the Socio-demographic Index (SDI), air pollution, and smoking as predictors for asthma and atopic dermatitis. To assess trends in the burden of asthma and atopic dermatitis before (2010–19) and during (2019–21) the COVID-19 pandemic, we compared their average annual percentage changes (AAPCs). Findings: In 2021, there were an estimated 260 million (95% UI 227–298) individuals with asthma and 129 million (124–134) individuals with atopic dermatitis worldwide. Asthma cases declined from 287 million (250–331) in 1990 to 238 million (209–272) in 2005 but increased to 260 million in 2021. Atopic dermatitis cases consistently rose from 107 million (103–112) in 1990 to 129 million (124–134) in 2021. However, age-standardised prevalence rates decreased—by 40·0% (from 5568·3 per 100 000 to 3340·1 per 100 000) for asthma and 8·3% (from 1885·4

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Efficient Mode Transfer on a Compact Silicon Chip by Encircling Moving Exceptional Points

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Physical Review Letters 2020年第15期124卷 153903-153903页

作者： Qingjie Liu Shuyi Li Bing Wang Shaolin Ke Chengzhi Qin Kai Wang Weiwei Liu Dingshan Gao Pierre Berini Peixiang Lu School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan 430205 China School of Electrical Engineering and Computer Science University of Ottawa Ottawa Ontario K1N 6N5 Canada Department of Physics and Center for Research in Photonics University of Ottawa Ottawa Ontario K1N 6N5 Canada CAS Center for Excellence in Ultra-Intense Laser Science Shanghai 201800 China

Exceptional points (EPs) are branch point singularities of self-intersecting Riemann sheets, and they can be observed in a non-Hermitian system with complex eigenvalues. It has been revealed recently that dynamically encircling EPs by adiabatically changing the parameters of a system composed of lossy optical waveguides could lead to asymmetric (input-output) mode transfer. However, the length of the waveguides had to be considerable to ensure adiabatic evolution. Here we demonstrate that the parameters can change adiabatically along a smaller encircling loop by utilizing moving EPs, leading to significant shortening of the structures compared to fixed EPs. Meanwhile, the mode transmittance is remarkably improved and the transfer efficiency persists at ∼90%. Moving EPs are very promising for applications such as highly integrated broadband optical switches and convertors operating at telecommunication wavelengths.

关键词： Metamaterials Optical materials & elements Photonics Waveguides

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