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Contrastive Learning (CL) is a recent representation learning approach, which encourages inter-class separability and intra-class compactness in learned image representations. Since medical images often contain multiple semantic classes in…

Computer Vision and Pattern Recognition · Computer Science 2021-08-09 Prashant Pandey , Ajey Pai , Nisarg Bhatt , Prasenjit Das , Govind Makharia , Prathosh AP , Mausam

The rapid growth of unlabeled time series data, driven by the Internet of Things (IoT), poses significant challenges in uncovering underlying patterns. Traditional unsupervised clustering methods often fail to capture the complex nature of…

Machine Learning · Computer Science 2025-03-31 Congyu Wang , Mingjing Du , Xiang Jiang , Yongquan Dong

Previous deepfake detection methods mostly depend on low-level textural features vulnerable to perturbations and fall short of detecting unseen forgery methods. In contrast, high-level semantic features are less susceptible to perturbations…

Computer Vision and Pattern Recognition · Computer Science 2024-07-30 Ziyuan Fang , Hanqing Zhao , Tianyi Wei , Wenbo Zhou , Ming Wan , Zhanyi Wang , Weiming Zhang , Nenghai Yu

We address the problem of few-shot semantic segmentation (FSS), which aims to segment novel class objects in a target image with a few annotated samples. Though recent advances have been made by incorporating prototype-based metric…

Computer Vision and Pattern Recognition · Computer Science 2021-11-10 Hyeongjun Kwon , Somi Jeong , Sunok Kim , Kwanghoon Sohn

Image colorization achieves more and more realistic results with the increasing computation power of recent deep learning techniques. It becomes more difficult to identify the fake colorized images by human eyes. In this work, we propose a…

Computer Vision and Pattern Recognition · Computer Science 2019-02-19 Weize Quan , Dong-Ming Yan , Kai Wang , Xiaopeng Zhang , Denis Pellerin

Parameter-efficient fine-tuning (PEFT) has emerged as a popular strategy for adapting large vision foundation models, such as the Segment Anything Model (SAM) and LLaVA, to downstream tasks like image forgery detection and localization…

Computer Vision and Pattern Recognition · Computer Science 2025-08-19 Rongxuan Peng , Shunquan Tan , Chenqi Kong , Anwei Luo , Alex C. Kot , Jiwu Huang

In this paper we present TruFor, a forensic framework that can be applied to a large variety of image manipulation methods, from classic cheapfakes to more recent manipulations based on deep learning. We rely on the extraction of both…

Computer Vision and Pattern Recognition · Computer Science 2023-05-29 Fabrizio Guillaro , Davide Cozzolino , Avneesh Sud , Nicholas Dufour , Luisa Verdoliva

The self-supervised contrastive learning strategy has attracted considerable attention due to its exceptional ability in representation learning. However, current contrastive learning tends to learn global coarse-grained representations of…

Computer Vision and Pattern Recognition · Computer Science 2025-10-09 Jialu Shi , Zhiqiang Wei , Jie Nie , Lei Huang

Recently, self-supervised methods show remarkable achievements in image-level representation learning. Nevertheless, their image-level self-supervisions lead the learned representation to sub-optimal for dense prediction tasks, such as…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Yunsung Lee , Teakgyu Hong , Han-Cheol Cho , Junbum Cha , Seungryong Kim

Manipulation tools that realistically edit images are widely available, making it easy for anyone to create and spread misinformation. In an attempt to fight fake news, forgery detection and localization methods were designed. However,…

Computer Vision and Pattern Recognition · Computer Science 2022-10-06 Hannes Mareen , Dante Vanden Bussche , Fabrizio Guillaro , Davide Cozzolino , Glenn Van Wallendael , Peter Lambert , Luisa Verdoliva

Fine-grained recognition involves the classification of images from subordinate macro-categories, and it is challenging due to small inter-class differences. To overcome this, most methods perform discriminative feature selection enabled by…

Computer Vision and Pattern Recognition · Computer Science 2024-07-19 Edwin Arkel Rios , Min-Chun Hu , Bo-Cheng Lai

This paper tackles the challenge of detecting partially manipulated facial deepfakes, which involve subtle alterations to specific facial features while retaining the overall context, posing a greater detection difficulty than fully…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Andrii Yermakov , Jan Cech , Jiri Matas

Graph Contrastive Learning (GCL) relies on semantically consistent graph augmentations, but common local perturbations provide limited control over global structural consistency, motivating a more principled global augmentation strategy. We…

Machine Learning · Computer Science 2026-05-13 Nero Z. Li , Xuehao Zhai , Zhichao Shi , Boshen Shi , Xuhui Jiang

Modern image retrieval methods typically rely on fine-tuning pre-trained encoders to extract image-level descriptors. However, the most widely used models are pre-trained on ImageNet-1K with limited classes. The pre-trained feature…

Computer Vision and Pattern Recognition · Computer Science 2023-04-13 Xiang An , Jiankang Deng , Kaicheng Yang , Jaiwei Li , Ziyong Feng , Jia Guo , Jing Yang , Tongliang Liu

As a fundamental visual attribute, image complexity significantly influences both human perception and the performance of computer vision models. However, accurately assessing and quantifying image complexity remains a challenging task. (1)…

Computer Vision and Pattern Recognition · Computer Science 2025-04-28 Shipeng Liu , Liang Zhao , Dengfeng Chen

In the last decade, computer vision has witnessed the establishment of various training and learning approaches. Techniques like adversarial learning, contrastive learning, diffusion denoising learning, and ordinary reconstruction learning…

Image fusion is a crucial technique in the field of computer vision, and its goal is to generate high-quality fused images and improve the performance of downstream tasks. However, existing fusion methods struggle to balance these two…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Hui Li , Congcong Bian , Zeyang Zhang , Xiaoning Song , Xi Li , Xiao-Jun Wu

Dense local descriptors and machine learning have been used with success in several applications, like classification of textures, steganalysis, and forgery detection. We develop a new image forgery detector building upon some descriptors…

Computer Vision and Pattern Recognition · Computer Science 2013-11-28 Davide Cozzolino , Diego Gragnaniello , Luisa Verdoliva

Learning discriminative image representations plays a vital role in long-tailed image classification because it can ease the classifier learning in imbalanced cases. Given the promising performance contrastive learning has shown recently in…

Computer Vision and Pattern Recognition · Computer Science 2021-03-29 Peng Wang , Kai Han , Xiu-Shen Wei , Lei Zhang , Lei Wang

Clustering is the task of gathering similar data samples into clusters without using any predefined labels. It has been widely studied in machine learning literature, and recent advancements in deep learning have revived interest in this…

Machine Learning · Computer Science 2023-09-04 Mohammadreza Sadeghi , Hadi Hojjati , Narges Armanfard