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The rapid advancement of generative artificial intelligence has enabled the creation of synthetic images that are increasingly indistinguishable from authentic content, posing significant challenges for digital media integrity. This problem…

计算机视觉与模式识别 · 计算机科学 2025-11-24 Jaime Álvarez Urueña , David Camacho , Javier Huertas Tato

We introduce a simple neural encoder architecture that can be trained using an unsupervised contrastive learning objective which gets its positive samples from data-augmented k-Nearest Neighbors search. We show that when built on top of…

人工智能 · 计算机科学 2023-10-24 Robin Algayres , Adel Nabli , Benoit Sagot , Emmanuel Dupoux

Attributed network embedding (ANE) is to learn low-dimensional vectors so that not only the network structure but also node attributes can be preserved in the embedding space. Existing ANE models do not consider the specific combination…

社会与信息网络 · 计算机科学 2021-06-18 I-Chung Hsieh , Cheng-Te Li

Contrastive learning has proven to be highly efficient and adaptable in shaping representation spaces across diverse modalities by pulling similar samples together and pushing dissimilar ones apart. However, two key limitations persist: (1)…

机器学习 · 计算机科学 2025-12-08 Ziwen Wang , Jiajun Fan , Thao Nguyen , Heng Ji , Ge Liu

Semi-Supervised image classification is one of the most fundamental problem in computer vision, which significantly reduces the need for human labor. In this paper, we introduce a new semi-supervised learning algorithm - SimMatchV2, which…

计算机视觉与模式识别 · 计算机科学 2023-08-15 Mingkai Zheng , Shan You , Lang Huang , Chen Luo , Fei Wang , Chen Qian , Chang Xu

Many problems in computer vision require dealing with sparse, unordered data in the form of point clouds. Permutation-equivariant networks have become a popular solution-they operate on individual data points with simple perceptrons and…

计算机视觉与模式识别 · 计算机科学 2021-02-02 Weiwei Sun , Wei Jiang , Eduard Trulls , Andrea Tagliasacchi , Kwang Moo Yi

While effective in recommendation tasks, collaborative filtering (CF) techniques face the challenge of data sparsity. Researchers have begun leveraging contrastive learning to introduce additional self-supervised signals to address this.…

信息检索 · 计算机科学 2024-02-20 Peijie Sun , Le Wu , Kun Zhang , Xiangzhi Chen , Meng Wang

Nearest neighbor (NN) sampling provides more semantic variations than pre-defined transformations for self-supervised learning (SSL) based image recognition problems. However, its performance is restricted by the quality of the support set,…

计算机视觉与模式识别 · 计算机科学 2023-08-15 Momojit Biswas , Himanshu Buckchash , Dilip K. Prasad

Object pose estimation is important for object manipulation and scene understanding. In order to improve the general applicability of pose estimators, recent research focuses on providing estimates for novel objects, that is objects unseen…

计算机视觉与模式识别 · 计算机科学 2023-06-02 Stefan Thalhammer , Jean-Baptiste Weibel , Markus Vincze , Jose Garcia-Rodriguez

The goal of this work is to efficiently identify visually similar patterns in images, e.g. identifying an artwork detail copied between an engraving and an oil painting, or recognizing parts of a night-time photograph visible in its daytime…

计算机视觉与模式识别 · 计算机科学 2022-03-29 Xi Shen , Alexei A. Efros , Armand Joulin , Mathieu Aubry

Unsupervised contrastive learning achieves great success in learning image representations with CNN. Unlike most recent methods that focused on improving accuracy of image classification, we present a novel contrastive learning approach,…

计算机视觉与模式识别 · 计算机科学 2021-07-26 Enze Xie , Jian Ding , Wenhai Wang , Xiaohang Zhan , Hang Xu , Peize Sun , Zhenguo Li , Ping Luo

We present Contrastive Neighborhood Alignment (CNA), a manifold learning approach to maintain the topology of learned features whereby data points that are mapped to nearby representations by the source (teacher) model are also mapped to…

机器学习 · 计算机科学 2022-01-07 Pengkai Zhu , Zhaowei Cai , Yuanjun Xiong , Zhuowen Tu , Luis Goncalves , Vijay Mahadevan , Stefano Soatto

Most Neural Networks (NNs) for classification are trained using Cross-Entropy as a loss function. This approach requires the model to have an explicit classification layer. However, there exist alternative approaches, such as Contrastive…

机器学习 · 计算机科学 2026-04-27 Leonardo Arrighi , Julia Eva Belloni , Aurélie Gallet , Ivan Gentile , Matteo Lippi , Marco Zullich

Our work tackles the fundamental challenge of image segmentation in computer vision, which is crucial for diverse applications. While supervised methods demonstrate proficiency, their reliance on extensive pixel-level annotations limits…

计算机视觉与模式识别 · 计算机科学 2024-11-11 Boujemaa Guermazi , Naimul Khan

Image clustering is a classic problem in computer vision, which categorizes images into different groups. Recent studies utilize nouns as external semantic knowledge to improve clustering performance. However, these methods often overlook…

计算机视觉与模式识别 · 计算机科学 2025-12-19 Xingyu Zhu , Beier Zhu , Yunfan Li , Junfeng Fang , Shuo Wang , Kesen Zhao , Hanwang Zhang

Recent successes in self-supervised learning (SSL) model spatial co-occurrences of visual features either by masking portions of an image or by aggressively cropping it. Here, we propose a new way to model spatial co-occurrences by aligning…

机器学习 · 计算机科学 2025-01-07 Arthur Aubret , Céline Teulière , Jochen Triesch

Prior research on self-supervised learning has led to considerable progress on image classification, but often with degraded transfer performance on object detection. The objective of this paper is to advance self-supervised pretrained…

计算机视觉与模式识别 · 计算机科学 2021-04-07 Ceyuan Yang , Zhirong Wu , Bolei Zhou , Stephen Lin

To create state-of-the-art models for many downstream tasks, it has become common practice to fine-tune a pre-trained large vision model. However, it remains an open question of how to best determine which of the many possible model…

机器学习 · 计算机科学 2025-12-08 Simon Guiroy , Mats Richter , Sarath Chandar , Christopher Pal

The aim of surface defect detection is to identify and localise abnormal regions on the surfaces of captured objects, a task that's increasingly demanded across various industries. Current approaches frequently fail to fulfil the extensive…

计算机视觉与模式识别 · 计算机科学 2024-08-23 Blaž Rolih , Matic Fučka , Danijel Skočaj

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…

计算机视觉与模式识别 · 计算机科学 2024-07-19 Edwin Arkel Rios , Min-Chun Hu , Bo-Cheng Lai