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IEEE International Conference on Bioinformatics and Biomedicine (BIBM)

作者： Yingtai Li Shuo Yang Xiaoyan Wu Shan He S. Kevin Zhou School of Biomedical Engineering Division of Life Sciences and Medicine USTC Hefei P.R. China Center for Medical Imaging Robotics Analytic Computing & Learning (MIRACLE) Suzhou Institute for Advanced Research USTC P.R. China iFLYTEK Research iFLYTEK Co. Ltd Hefei P.R. China Key Lab of Intelligent Information Processing of Chinese Academy of Sciences (CAS) Institute of Computing Technology CAS Beijing P.R. China

ISBN: (数字)9798350386226

ISBN: (纸本)9798350386233

In this study, we explore using Stable Diffusion (SD) for unsupervised medical image-to-image translation. SD has shown remarkable performances in generating high-quality images and can be easily applied to generate custom contents by injecting standard plug-ins like LoRA, offering a promising solution to tackle the complexity caused by variations in imaging modalities, acquisition parameters, and body parts in medical imaging. However, We empirically find that existing pipelines designed for natural images fail to translate directly to medical images due to weak structural control and inappropriate color preservation. To address these issues, we propose a novel two-branch image translation pipeline. This pipeline decouples the generation of target image along the time axis and employs ControlNet to ensure precise structural preservation. Additionally, we customize SD to generate images of extreme brightness, a common feature in medical imaging. Our results on the BraTS dataset demonstrate that SD with task-specific plug-ins can generate high-quality medical images comparable to those generated by task-specific models. Since the development of these standard plug-ins can be easily done by clinicians without much knowledge of the underlying algorithm, such a mode holds the potential to significantly extend the use of medical image computing algorithms in the clinical environment.

关键词： Translation Image color analysis Computational modeling Biological system modeling Magnetic resonance imaging Pipelines Brightness Complexity theory Standards Biomedical imaging

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Automatic Recognition of Social Engagement for Children with Autism Spectrum Disorder

Automatic Recognition of Social Engagement for Children with...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Xinming Wang Xiangdong Zhang Zhiyong Wang Wei Nie Hanlin Zhang Xiu Xu Honghai Liu State Key Laboratory of Robotics and Systems School of Mechanical and Automation Harbin Institute of Technology (Shenzhen) Shenzhen China Lishui Maternity and Child Health Care Hospital Center of Medical Prenatal Diagnosis Lishui China Department of Child Health Care Children's Hospital of Fudan University Shanghai China School of Computing University of Portsmouth Portsmouth U.K Peng Cheng Laboratory Shenzhen China

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

Estimating children's engagement levels improves their understanding of their social behaviors, since they can reflect their devotion to social interaction with others. This paper proposes an automatic method to recognize children's engagement levels in a triadic social interaction context. First, an overall metric function containing behavior, cognition, and affective dimensions is proposed to estimate children's multidimensional engagement levels. Then, the automatic feature extraction method based on gaze estimation, facial expression recognition, pose estimation, and object recognition models is illustrated to extract features to compute the engagement levels. Videos of 24 children, including 13 children with autism spectrum disorder (ASD), in triadic social interaction were collected for the engagement recognition experiment and cross-group analysis. The experimental results validate the effectiveness of the proposed automatic feature extraction method compared to human observations. Cross-group analyses revealed significant differences in affective engagement between children with ASD and typical developmental (TD) children.

关键词： Measurement Autism Computer vision Computational modeling Face recognition Pose estimation Feature extraction Object recognition Cybernetics Videos

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PhysRFANet: Physics-Guided Neural Network for Real-Time Prediction of Thermal Effect During Radiofrequency Ablation Treatment

arXiv

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arXiv 2023年

作者： Shin, Minwoo Seo, Minjee Cho, Seonaeng Park, Juil Kwon, Joon Ho Lee, Deukhee Yoon, Kyungho School of Mathematics and Computing Yonsei University Seoul Korea Republic of Department of Radiology Yonsei University College of Medicine Seoul Korea Republic of Center for Healthcare Robotics Korea Institute of Science and Technology Seoul Korea Republic of Yonsei-KIST Convergence Research Institute Yonsei University Seoul Korea Republic of

Radiofrequency ablation (RFA) is a widely used minimally invasive technique for ablating solid tumors. Achieving precise personalized treatment necessitates feedback information on in situ thermal effects induced by the RFA procedure. While computer simulation facilitates the prediction of electrical and thermal phenomena associated with RFA, its practical implementation in clinical settings is hindered by high computational demands. In this paper, we propose a physics-guided neural network model, named PhysRFANet, to enable real-time prediction of thermal effect during RFA treatment. The networks, designed for predicting temperature distribution and the corresponding ablation lesion, were trained using biophysical computational models that integrated electrostatics, bio-heat transfer, and cell necrosis, alongside magnetic resonance (MR) images of breast cancer patients. Validation of the computational model was performed through experiments on ex vivo bovine liver tissue. Our model demonstrated a 96% Dice score in predicting the lesion volume and an RMSE of 0.4854 for temperature distribution when tested with foreseen tumor images. Notably, even with unforeseen images, it achieved a 93% Dice score for the ablation lesion and an RMSE of 0.6783 for temperature distribution. All networks were capable of inferring results within 10 ms. The presented technique, applied to optimize the placement of the electrode for a specific target region, holds significant promise in enhancing the safety and efficacy of RFA treatments. Copyright © 2023, The Authors. All rights reserved.

关键词： Magnetic resonance

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MS-Glance: Bio-Inspired Non-Semantic Context Vectors and Their Applications in Supervising Image Reconstruction

MS-Glance: Bio-Inspired Non-Semantic Context Vectors and The...

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IEEE Workshop on Applications of Computer Vision (WACV)

作者： Ziqi Gao Wendi Yang Yujia Li Lei Xing S. Kevin Zhou Division of Life Sciences and Medicine School of Biomedical Engineering University of Science and Technology of China (USTC) Hefei Anhui China Center for Medical Imaging Robotics Analytic Computing & Learning (MIRACLE) Suzhou Institute for Advance Research USTC Suzhou Jiangsu China Key Laboratory of Intelligent Information Processing of Chinese Academy of Sciences (CAS) Institute of Computing Technology China Department of Radiation Oncology Stanford University Stanford CA USA Key Laboratory of Precision and Intelligent Chemistry USTC CAS Hefei Anhui

ISBN: (数字)9798331510831

ISBN: (纸本)9798331510848

Non-semantic context information is crucial for visual recognition, as the human visual perception system first uses global statistics to process scenes rapidly before identifying specific objects. However, while semantic information is increasingly incorporated into computer vision tasks such as image reconstruction, non-semantic information, such as global spatial structures, is often overlooked. To bridge the gap, we propose a biologically informed non-semantic context descriptor, MS-Glance, along with the Glance Index Measure for comparing two images. A Global Glance vector is formulated by randomly retrieving pixels based on a perception-driven rule from an image to form a vector representing non-semantic global context, while a local Glance vector is a flattened local image window, mimicking a zoom in observation. The Glance Index is defined as the inner product of two standardized sets of Glance vectors. We evaluate the effectiveness of incorporating Glance supervision in two reconstruction tasks: image fitting with implicit neural representation (INR) and undersampled MRI reconstruction. Extensive experimental results show that MS-Glance outperforms existing image restoration losses across both natural and medical images. The code is available at https://***/Z7Gao/MSGlance.

关键词： Computer vision Visualization Magnetic resonance imaging Fitting Vectors Image restoration Indexes Image reconstruction Biomedical imaging Visual perception

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4D unsupervised object discovery 22

4D unsupervised object discovery

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Proceedings of the 36th International Conference on Neural Information Processing Systems

作者： Yuqi Wang Yuntao Chen Zhaoxiang Zhang Center for Research on Intelligent Perception and Computing (CRIPAC) National Laboratory of Pattern Recognition (NLPR) Institute of Automation Chinese Academy of Sciences (CASIA) and School of Artificial Intelligence University of Chinese Academy of Sciences Centre for Artificial Intelligence and Robotics HKISI_CAS Center for Research on Intelligent Perception and Computing (CRIPAC) National Laboratory of Pattern Recognition (NLPR) Institute of Automation Chinese Academy of Sciences (CASIA) and School of Artificial Intelligence University of Chinese Academy of Sciences and Centre for Artificial Intelligence and Robotics HKISI_CAS

ISBN: (纸本)9781713871088

Object discovery is a core task in computer vision. While fast progresses have been made in supervised object detection, its unsupervised counterpart remains largely unexplored. With the growth of data volume, the expensive cost of annotations is the major limitation hindering further study. Therefore, discovering objects without annotations has great significance. However, this task seems impractical on still-image or point cloud alone due to the lack of discriminative information. Previous studies underlook the crucial temporal information and constraints naturally behind multi-modal inputs. In this paper, we propose 4D unsupervised object discovery, jointly discovering objects from 4D data - 3D point clouds and 2D RGB images with temporal information. We present the first practical approach for this task by proposing a ClusterNet on 3D point clouds, which is jointly it- eratively optimized with a 2D localization network. Extensive experiments on the large-scale Waymo Open Dataset suggest that the localization network and ClusterNet achieve competitive performance on both class-agnostic 2D object detection and 3D instance segmentation, bridging the gap between unsupervised methods and full supervised ones.

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REAL-TIME RECONSTRUCTION OF GROUND MOTION DURING SMALL MAGNITUDE EARTHQUAKES: A PILOT STUDY

arXiv

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arXiv 2025年

作者： Kim, Youngkyu Kong, Qingkai Choi, Youngsoo Pitarka, Arben Yoo, Byounghyun Intelligence and Interaction Research Center Korea Institute of Science and Technology Seongbuk-gu Seoul02792 Korea Republic of Atmospheric Earth & Energy Division Lawrence Livermore National Laboratory LivermoreCA94550 United States Center for Applied Scientific Computing Lawrence Livermore National Laboratory LivermoreCA94550 United States Intelligence and Interaction Research Center Korea Institute of Science and Technology AI-Robotics KIST School Korea National University of Science and Technology Seongbuk-gu Seoul02792 Korea Republic of

关键词： Seismic response

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Enhancing Socially-Aware Robot Navigation through Bidirectional Natural Language Conversation

arXiv

引用

arXiv 2024年

作者： Wen, Congcong Liu, Yifan Bethala, Geeta Chandra Raju Peng, Zheng Lin, Hui Liu, Yu-Shen Fang, Yi NYUAD Center for Artificial Intelligence and Robotics New York University Abu Dhabi United Arab Emirates NYU Multimedia and Visual Computing Lab New York University United States New York University Abu Dhabi United Arab Emirates Tandon School of Engineering New York University New York United States School of Cyber Science and Technology University of Science and Technology of China Anhui China School of Software Tsinghua University Beijing China

Robot navigation is an important research field with applications in various domains. However, traditional approaches often prioritize efficiency and obstacle avoidance, neglecting a nuanced understanding of human behavior or intent in shared spaces. With the rise of service robots, there's an increasing emphasis on endowing robots with the capability to navigate and interact in complex real-world environments. Socially aware navigation has recently become a key research area. However, existing work either predicts pedestrian movements or simply emits alert signals to pedestrians, falling short of facilitating genuine interactions between humans and robots. In this paper, we introduce the Hybrid Soft Actor-Critic with Large Language Model (HSAC-LLM), an innovative model designed for socially-aware navigation in robots. This model seamlessly integrates deep reinforcement learning with large language models, enabling it to predict both continuous and discrete actions for navigation. Notably, HSACLLM facilitates bidirectional interaction based on natural language with pedestrian models. When a potential collision with pedestrians is detected, the robot can initiate or respond to communications with pedestrians, obtaining and executing subsequent avoidance strategies. Experimental results in 2D simulation, the Gazebo environment, and the real-world environment demonstrate that HSAC-LLM not only efficiently enables interaction with humans but also exhibits superior performance in navigation and obstacle avoidance compared to state-of-the-art DRL algorithms. We believe this innovative paradigm opens up new avenues for effective and socially aware human-robot interactions in dynamic environments. Videos are available at https://***/. Copyright © 2024, The Authors. All rights reserved.

关键词： Deep reinforcement learning

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Synthesis of Decoherence-Free Modes in Linear Quantum Passive Systems via Robust Pole Placement

Synthesis of Decoherence-Free Modes in Linear Quantum Passiv...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Zibo Miao Yu Pan Qing Gao Guangdong Key Laboratory of Intelligent Morphing Mechanisms School of Mechanical Engineering and Automation Adaptive Robotics Harbin Institute of Technology Shenzhen China State Key Laboratory of Industrial Control Technology The Institute of Cyber-Systems and Control College of Control Science and Engineering Zhejiang University Hangzhou China The School of Automation Science and Electrical Engineering Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang University Beijing China

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

In this paper we extend our previous research on coherent observer-based pole placement approach to study the synthesis of robust decoherence-free (DF) modes for linear quantum passive systems, which is aimed at preservation of quantum information. In particular, DF modes can be generated by placing the poles on the imaginary axis via a coherent feedback design scheme, and these modes can further be simultaneously made robust against perturbations to the system parameters by minimizing the condition number associated with imaginary poles. We develop explicit algebraic conditions for the existence of such a coherent quantum controller, with the corresponding deign procedure provided. Examples are given to illustrate the process of tuning the DF modes towards perfect robustness via the proposed pole placement technique.

关键词： Perturbation methods Design methodology Quantum optics Robustness Feedback control Closed loop systems Tuning Cybernetics

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Attentive Contextual Attention for Cloud Removal

arXiv

引用

arXiv 2024年

作者： Huang, Wenli Deng, Ye Wu, Yang Wang, Jinjun The School of Electronic and Information Engineering Ningbo University of Technology No. 201 Fenghua Road Jiangbei District Zhejiang Ningbo China The Engineering Research Center of Intelligent Finance Ministry of Education School of Computing and Artificial Intelligence Southwestern University of Finance and Economics No. 555 Liutai Avenue Wenjiang District Sichuan Chengdu611130 China The Institute of Artificial Intelligence and Robotics Xi’an Jiaotong University Shaanxi Xi’an710049 China

Cloud cover can significantly hinder the use of remote sensing images for Earth observation, prompting urgent advancements in cloud removal technology. Recently, deep learning strategies, especially convolutional neural networks (CNNs) with attention mechanisms, have shown strong potential in restoring cloud-obscured areas. These methods utilize convolution to extract intricate local features and attention mechanisms to gather long-range information, improving the overall comprehension of the scene. However, a common drawback of these approaches is that the resulting images often suffer from blurriness, artifacts, and inconsistencies. This is partly because attention mechanisms apply weights to all features based on generalized similarity scores, which can inadvertently introduce noise and irrelevant details from cloud-covered areas. To overcome this limitation and better capture relevant distant context, we introduce a novel approach named Attentive Contextual Attention (AC-Attention). This method enhances conventional attention mechanisms by dynamically learning data-driven attentive selection scores, enabling it to filter out noise and irrelevant features effectively. By integrating the AC-Attention module into the DSen2-CR cloud removal framework, we significantly improve the model’s ability to capture essential distant information, leading to more effective cloud removal. Our extensive evaluation of various datasets shows that our method outperforms existing ones regarding image reconstruction quality. Additionally, we conducted ablation studies by integrating AC-Attention into multiple existing methods and widely used network architectures. These studies demonstrate the effectiveness and adaptability of AC-Attention and reveal its ability to focus on relevant features, thereby improving the overall performance of the networks. The code is available at https://***/huangwenwenlili/ACA-CRNet. Copyright © 2024, The Authors. All rights reserved.

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Compositional Inversion for Stable Diffusion Models

arXiv

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arXiv 2023年

作者： Zhang, Xulu Wei, Xiao-Yong Wu, Jinlin Zhang, Tianyi Zhang, Zhaoxiang Lei, Zhen Li, Qing Department of Computing the Hong Kong Polytechnic University Hong Kong Center for Artificial Intelligence and Robotics HKISI CAS Hong Kong College of Computer Science Sichuan University Chengdu China School of Artificial Intelligence UCAS Beijing China State Key Laboratory of Multimodal Artificial Intelligence Systems CASIA Beijing China

Inversion methods, such as Textual Inversion, generate personalized images by incorporating concepts of interest provided by user images. However, existing methods often suffer from overfitting issues, where the dominant presence of inverted concepts leads to the absence of other desired concepts. It stems from the fact that during inversion, the irrelevant semantics in the user images are also encoded, forcing the inverted concepts to occupy locations far from the core distribution in the embedding space. To address this issue, we propose a method that guides the inversion process towards the core distribution for compositional embeddings. Additionally, we introduce a spatial regularization approach to balance the attention on the concepts being composed. Our method is designed as a post-training approach and can be seamlessly integrated with other inversion methods. Experimental results demonstrate the effectiveness of our proposed approach in mitigating the overfitting problem and generating more diverse and balanced compositions of concepts in the synthesized images. The source code is available at https://***/zhangxulu1996/Compositional-Inversion. © 2023, CC BY.

关键词： Semantics

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