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Contrastive, self-supervised learning of object representations recently emerged as an attractive alternative to reconstruction-based training. Prior approaches focus on contrasting individual object representations (slots) against one…

Computer Vision and Pattern Recognition · Computer Science 2020-11-23 Sindy Löwe , Klaus Greff , Rico Jonschkowski , Alexey Dosovitskiy , Thomas Kipf

Representation learning is a fundamental aspect of modern artificial intelligence, driving substantial improvements across diverse applications. While selfsupervised contrastive learning has led to significant advancements in fields like…

Machine Learning · Computer Science 2024-11-19 Suiyao Chen , Jing Wu , Yunxiao Wang , Cheng Ji , Tianpei Xie , Daniel Cociorva , Michael Sharps , Cecile Levasseur , Hakan Brunzell

Face deepfake detection has seen impressive results recently. Nearly all existing deep learning techniques for face deepfake detection are fully supervised and require labels during training. In this paper, we design a novel deepfake…

Computer Vision and Pattern Recognition · Computer Science 2021-04-26 Sheldon Fung , Xuequan Lu , Chao Zhang , Chang-Tsun Li

We introduce NeCo: Patch Neighbor Consistency, a novel self-supervised training loss that enforces patch-level nearest neighbor consistency across a student and teacher model. Compared to contrastive approaches that only yield binary…

Computer Vision and Pattern Recognition · Computer Science 2025-04-18 Valentinos Pariza , Mohammadreza Salehi , Gertjan Burghouts , Francesco Locatello , Yuki M. Asano

We show that bringing intermediate layers' representations of two augmented versions of an image closer together in self-supervised learning helps to improve the momentum contrastive (MoCo) method. To this end, in addition to the…

Computer Vision and Pattern Recognition · Computer Science 2021-10-29 Aakash Kaku , Sahana Upadhya , Narges Razavian

We present ReCo, a contrastive learning framework designed at a regional level to assist learning in semantic segmentation. ReCo performs semi-supervised or supervised pixel-level contrastive learning on a sparse set of hard negative…

Computer Vision and Pattern Recognition · Computer Science 2022-02-01 Shikun Liu , Shuaifeng Zhi , Edward Johns , Andrew J. Davison

Convolutional Neural networks (CNN) have been the first choice of paradigm in many computer vision applications. The convolution operation however has a significant weakness which is it only operates on a local neighborhood of pixels, thus…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Michael Yang

Contrastive instance discrimination methods outperform supervised learning in downstream tasks such as image classification and object detection. However, these methods rely heavily on data augmentation during representation learning, which…

Computer Vision and Pattern Recognition · Computer Science 2025-04-21 Mohammad Alkhalefi , Georgios Leontidis , Mingjun Zhong

Recent progress in contrastive learning has revolutionized unsupervised representation learning. Concretely, multiple views (augmentations) from the same image are encouraged to map to the similar embeddings, while views from different…

Computer Vision and Pattern Recognition · Computer Science 2021-01-20 Nanxuan Zhao , Zhirong Wu , Rynson W. H. Lau , Stephen Lin

Deep learning has achieved great success in recent years with the aid of advanced neural network structures and large-scale human-annotated datasets. However, it is often costly and difficult to accurately and efficiently annotate…

Computer Vision and Pattern Recognition · Computer Science 2023-03-23 Chen Feng , Ioannis Patras

Recent development in vision-language approaches has instigated a paradigm shift in learning visual recognition models from language supervision. These approaches align objects with language queries (e.g. "a photo of a cat") and improve the…

Computer Vision and Pattern Recognition · Computer Science 2023-06-27 Liunian Harold Li , Zi-Yi Dou , Nanyun Peng , Kai-Wei Chang

Reliable detection of anomalies is crucial when deploying machine learning models in practice, but remains challenging due to the lack of labeled data. To tackle this challenge, contrastive learning approaches are becoming increasingly…

Computer Vision and Pattern Recognition · Computer Science 2021-07-19 Puck de Haan , Sindy Löwe

We present a new self-supervised pre-training of Vision Transformers for dense prediction tasks. It is based on a contrastive loss across views that compares pixel-level representations to global image representations. This strategy…

Computer Vision and Pattern Recognition · Computer Science 2022-06-08 Jaonary Rabarisoa , Valentin Belissen , Florian Chabot , Quoc-Cuong Pham

Partially-supervised instance segmentation is a task which requests segmenting objects from novel unseen categories via learning on limited seen categories with annotated masks thus eliminating demands of heavy annotation burden. The key to…

Computer Vision and Pattern Recognition · Computer Science 2022-03-25 Xuehui Wang , Kai Zhao , Ruixin Zhang , Shouhong Ding , Yan Wang , Wei Shen

Image representation and classification are two fundamental tasks towards multimedia content retrieval and understanding. The idea that shape and texture information (e.g. edge or orientation) are the key features for visual representation…

Computer Vision and Pattern Recognition · Computer Science 2015-08-04 Sheng Guo , Weilin Huang , Yu Qiao

Learning discriminative representations of unlabelled data is a challenging task. Contrastive self-supervised learning provides a framework to learn meaningful representations using learned notions of similarity measures from simple pretext…

Computer Vision and Pattern Recognition · Computer Science 2023-01-04 Nicklas Boserup , Raghavendra Selvan

Recently, significant advancements in artificial intelligence have been attributed to the integration of self-supervised learning (SSL) scheme. While SSL has shown impressive achievements in natural language processing (NLP), its progress…

Computer Vision and Pattern Recognition · Computer Science 2024-11-05 Shervin Halat , Mohammad Rahmati , Ehsan Nazerfard

Deep learning-based dense object detectors have achieved great success in the past few years and have been applied to numerous multimedia applications such as video understanding. However, the current training pipeline for dense detectors…

Computer Vision and Pattern Recognition · Computer Science 2021-07-28 Zehui Chen , Chenhongyi Yang , Qiaofei Li , Feng Zhao , Zheng-Jun Zha , Feng Wu

The existing contrastive learning methods widely adopt one-hot instance discrimination as pretext task for self-supervised learning, which inevitably neglects rich inter-instance similarities among natural images, then leading to potential…

Computer Vision and Pattern Recognition · Computer Science 2023-06-30 Chengchao Shen , Dawei Liu , Hao Tang , Zhe Qu , Jianxin Wang

Dense retrieval (DR) has shown promising results in information retrieval. In essence, DR requires high-quality text representations to support effective search in the representation space. Recent studies have shown that pre-trained…

Information Retrieval · Computer Science 2022-08-23 Xinyu Ma , Ruqing Zhang , Jiafeng Guo , Yixing Fan , Xueqi Cheng