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Diffusion models are state-of-the-art deep learning empowered generative models that are trained based on the principle of learning forward and reverse diffusion processes via progressive noise-addition and denoising. To gain a better…

Computer Vision and Pattern Recognition · Computer Science 2023-06-12 Sheng-Yen Chou , Pin-Yu Chen , Tsung-Yi Ho

Image restoration aims to enhance low quality images, producing high quality images that exhibit natural visual characteristics and fine semantic attributes. Recently, the diffusion model has emerged as a powerful technique for image…

Computer Vision and Pattern Recognition · Computer Science 2024-07-23 Jiangtong Tan , Feng Zhao

Due to the high complexity and technical requirements of industrial production processes, surface defects will inevitably appear, which seriously affects the quality of products. Although existing lightweight detection networks are highly…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Xuyi Yu

In recent years, as various realistic face forgery techniques known as DeepFake improves by leaps and bounds,more and more DeepFake detection techniques have been proposed. These methods typically rely on detecting statistical differences…

Computer Vision and Pattern Recognition · Computer Science 2023-04-25 Yang Hou , Qing Guo , Yihao Huang , Xiaofei Xie , Lei Ma , Jianjun Zhao

Diffusion models have demonstrated remarkable efficacy in generating high-quality samples. Existing diffusion-based image restoration algorithms exploit pre-trained diffusion models to leverage data priors, yet they still preserve elements…

Image and Video Processing · Electrical Eng. & Systems 2024-08-07 Hongjie Wu , Linchao He , Mingqin Zhang , Dongdong Chen , Kunming Luo , Mengting Luo , Ji-Zhe Zhou , Hu Chen , Jiancheng Lv

Imperceptible adversarial attacks aim to fool DNNs by adding imperceptible perturbation to the input data. Previous methods typically improve the imperceptibility of attacks by integrating common attack paradigms with specifically designed…

Machine Learning · Computer Science 2025-03-13 Jin Li , Ziqiang He , Anwei Luo , Jian-Fang Hu , Z. Jane Wang , Xiangui Kang

Diffusion-based face swapping achieves state-of-the-art performance, yet it also exacerbates the potential harm of malicious face swapping to violate portraiture right or undermine personal reputation. This has spurred the development of…

Computer Vision and Pattern Recognition · Computer Science 2026-02-02 Yilong Huang , Songze Li

The increasingly pervasive facial recognition (FR) systems raise serious concerns about personal privacy, especially for billions of users who have publicly shared their photos on social media. Several attempts have been made to protect…

Computer Vision and Pattern Recognition · Computer Science 2025-12-02 Jiang Liu , Chun Pong Lau , Zhongliang Guo , Yuxiang Guo , Zhaoyang Wang , Rama Chellappa

Adversarial purification is a successful defense mechanism against adversarial attacks without requiring knowledge of the form of the incoming attack. Generally, adversarial purification aims to remove the adversarial perturbations…

Computation and Language · Computer Science 2023-05-04 Linyang Li , Demin Song , Xipeng Qiu

Restoring images afflicted by complex real-world degradations remains challenging, as conventional methods often fail to adapt to the unique mixture and severity of artifacts present. This stems from a reliance on indirect cues which poorly…

Computer Vision and Pattern Recognition · Computer Science 2025-04-18 Xin Su , Chen Wu , Yu Zhang , Chen Lyu , Zhuoran Zheng

Backpropagation-based approaches aim to align diffusion models with reward functions through end-to-end backpropagation of the reward gradient within the denoising chain, offering a promising perspective. However, due to the computational…

Computer Vision and Pattern Recognition · Computer Science 2025-07-31 Xiefan Guo , Miaomiao Cui , Liefeng Bo , Di Huang

Diffusion Purification, purifying noised images with diffusion models, has been widely used for enhancing certified robustness via randomized smoothing. However, existing frameworks often grapple with the balance between efficiency and…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Yiquan Li , Zhongzhu Chen , Kun Jin , Jiongxiao Wang , Bo Li , Chaowei Xiao

Existing fusion methods are tailored for high-quality images but struggle with degraded images captured under harsh circumstances, thus limiting the practical potential of image fusion. This work presents a \textbf{D}egradation and…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Linfeng Tang , Chunyu Li , Guoqing Wang , Yixuan Yuan , Jiayi Ma

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

Adversarial purification with diffusion models seeks to project adversarial examples back toward the data manifold, but balancing semantic preservation and robustness against adaptive attacks remains challenging. Recent work shows that…

Machine Learning · Computer Science 2026-05-12 Daniel Wesego , Pedram Rooshenas

The rapid growth of social media has led to the widespread sharing of individual portrait images, which pose serious privacy risks due to the capabilities of automatic face recognition (AFR) systems for mass surveillance. Hence, protecting…

Computer Vision and Pattern Recognition · Computer Science 2025-03-14 Ali Salar , Qing Liu , Yingli Tian , Guoying Zhao

Diffusion models have achieved impressive performance on multi-focus image fusion (MFIF). However, a key challenge in applying diffusion models to the ill-posed MFIF problem is that defocus blur can make common symmetric geometric…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Bo Li , Tingting Bao , Lingling Zhang , Weiping Fu , Yaxian Wang , Jun Liu

Diffusion models have recently shown remarkable generation ability, achieving state-of-the-art performance in many tasks. However, the high computational cost is still a troubling problem for diffusion models. To tackle this problem, we…

Computer Vision and Pattern Recognition · Computer Science 2023-11-17 Siao Tang , Xin Wang , Hong Chen , Chaoyu Guan , Yansong Tang , Wenwu zhu

In Virtual Reality (VR), adversarial attack remains a significant security threat. Most deep learning-based methods for physical and digital adversarial attacks focus on enhancing attack performance by crafting adversarial examples that…

Computer Vision and Pattern Recognition · Computer Science 2024-03-25 Qianyu Guo , Jiaming Fu , Yawen Lu , Dongming Gan

Diffusion models (DMs) have demonstrated great potential in the field of adversarial robustness, where DM-based defense methods can achieve superior defense capability without adversarial training. However, they all require huge…

Computer Vision and Pattern Recognition · Computer Science 2025-02-12 Hefei Mei , Minjing Dong , Chang Xu