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Diffusion models have been leveraged to perform adversarial purification and thus provide both empirical and certified robustness for a standard model. On the other hand, different robustly trained smoothed models have been studied to…

Machine Learning · Computer Science 2023-08-29 Jiawei Zhang , Zhongzhu Chen , Huan Zhang , Chaowei Xiao , Bo Li

Recent advances in imaging and high-performance computing have made it possible to image the entire human brain at the cellular level. This is the basis to study the multi-scale architecture of the brain regarding its subdivision into brain…

Image and Video Processing · Electrical Eng. & Systems 2023-11-29 Jan-Oliver Kropp , Christian Schiffer , Katrin Amunts , Timo Dickscheid

Ultrasound images are widespread in medical diagnosis for musculoskeletal, cardiac, and obstetrical imaging due to the efficiency and non-invasiveness of the acquisition methodology. However, the acquired images are degraded by acoustic…

Image and Video Processing · Electrical Eng. & Systems 2023-06-14 Hojat Asgariandehkordi , Sobhan Goudarzi , Adrian Basarab , Hassan Rivaz

Despite the fact that deep neural networks (DNNs) have achieved prominent performance in various applications, it is well known that DNNs are vulnerable to adversarial examples/samples (AEs) with imperceptible perturbations in…

Computer Vision and Pattern Recognition · Computer Science 2021-11-22 Yanni Li , Wenhui Zhang , Jiawei Liu , Xiaoli Kou , Hui Li , Jiangtao Cui

Deep neural networks (DNNs) have achieved tremendous success in many tasks of machine learning, such as the image classification. Unfortunately, researchers have shown that DNNs are easily attacked by adversarial examples, slightly…

Computer Vision and Pattern Recognition · Computer Science 2017-11-17 Yujia Liu , Weiming Zhang , Shaohua Li , Nenghai Yu

Adversarial patch attacks pose a significant threat to the practical deployment of deep learning systems. However, existing research primarily focuses on image pre-processing defenses, which often result in reduced classification accuracy…

Computer Vision and Pattern Recognition · Computer Science 2024-02-12 Nandish Chattopadhyay , Amira Guesmi , Muhammad Shafique

Despite the ever-increasing interest in applying deep learning (DL) models to medical imaging, the typical scarcity and imbalance of medical datasets can severely impact the performance of DL models. The generation of synthetic data that…

Image and Video Processing · Electrical Eng. & Systems 2023-04-03 Pouria Rouzrokh , Bardia Khosravi , Shahriar Faghani , Mana Moassefi , Sanaz Vahdati , Bradley J. Erickson

Adversarial evasion attacks pose significant threats to graph learning, with lines of studies that have improved the robustness of Graph Neural Networks (GNNs). However, existing works rely on priors about clean graphs or attacking…

Machine Learning · Computer Science 2025-02-10 Jiayi Luo , Qingyun Sun , Haonan Yuan , Xingcheng Fu , Jianxin Li

Image denoising can remove natural noise that widely exists in images captured by multimedia devices due to low-quality imaging sensors, unstable image transmission processes, or low light conditions. Recent works also find that image…

Computer Vision and Pattern Recognition · Computer Science 2021-08-25 Yupeng Cheng , Qing Guo , Felix Juefei-Xu , Wei Feng , Shang-Wei Lin , Weisi Lin , Yang Liu

Recently, automatic speaker verification (ASV) based on deep learning is easily contaminated by adversarial attacks, which is a new type of attack that injects imperceptible perturbations to audio signals so as to make ASV produce wrong…

Audio and Speech Processing · Electrical Eng. & Systems 2024-07-10 Yibo Bai , Xiao-Lei Zhang , Xuelong Li

Multimodal Large Language Models (MLLMs) have achieved remarkable success in tasks such as image captioning, visual question answering, and cross-modal reasoning by integrating visual and textual modalities. However, their multimodal nature…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Fengling Zhu , Boshi Liu , Jingyu Hua , Sheng Zhong

Remote sensing change detection is crucial for understanding the dynamics of our planet's surface, facilitating the monitoring of environmental changes, evaluating human impact, predicting future trends, and supporting decision-making. In…

Computer Vision and Pattern Recognition · Computer Science 2024-01-15 Wele Gedara Chaminda Bandara , Nithin Gopalakrishnan Nair , Vishal M. Patel

Nowadays, Deep Learning as a service can be deployed in Internet of Things (IoT) to provide smart services and sensor data processing. However, recent research has revealed that some Deep Neural Networks (DNN) can be easily misled by adding…

Cryptography and Security · Computer Science 2020-10-22 Ling Wang , Cheng Zhang , Zejian Luo , Chenguang Liu , Jie Liu , Xi Zheng , Athanasios Vasilakos

Malware detectors based on deep learning (DL) have been shown to be susceptible to malware examples that have been deliberately manipulated in order to evade detection, a.k.a. adversarial malware examples. More specifically, it has been…

Cryptography and Security · Computer Science 2024-03-14 Daniel Gibert , Giulio Zizzo , Quan Le

The introduction of diffusion models in anomaly detection has paved the way for more effective and accurate image reconstruction in pathologies. However, the current limitations in controlling noise granularity hinder diffusion models'…

Computer Vision and Pattern Recognition · Computer Science 2023-06-01 Cosmin I. Bercea , Michael Neumayr , Daniel Rueckert , Julia A. Schnabel

Adversarial attacks to image classification systems present challenges to convolutional networks and opportunities for understanding them. This study suggests that adversarial perturbations on images lead to noise in the features…

Computer Vision and Pattern Recognition · Computer Science 2019-03-26 Cihang Xie , Yuxin Wu , Laurens van der Maaten , Alan Yuille , Kaiming He

Due to various physical degradation factors and limited counts received, PET image quality needs further improvements. The denoising diffusion probabilistic models (DDPM) are distribution learning-based models, which try to transform a…

Image and Video Processing · Electrical Eng. & Systems 2022-09-15 Kuang Gong , Keith A. Johnson , Georges El Fakhri , Quanzheng Li , Tinsu Pan

Limited by the encoder-decoder architecture, learning-based edge detectors usually have difficulty predicting edge maps that satisfy both correctness and crispness. With the recent success of the diffusion probabilistic model (DPM), we…

Computer Vision and Pattern Recognition · Computer Science 2024-01-10 Yunfan Ye , Kai Xu , Yuhang Huang , Renjiao Yi , Zhiping Cai

Diffusion models have emerged as a promising class of generative models that map noisy inputs to realistic images. More recently, they have been employed to generate solutions to partial differential equations (PDEs). However, they still…

Machine Learning · Computer Science 2024-02-16 Amartya Mukherjee , Melissa M. Stadt , Lena Podina , Mohammad Kohandel , Jun Liu

Diffusion models have recently exhibited remarkable abilities to synthesize striking image samples since the introduction of denoising diffusion probabilistic models (DDPMs). Their key idea is to disrupt images into noise through a fixed…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Zijian Zhang , Zhou Zhao , Jun Yu , Qi Tian