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Unsupervised anomaly detection (AD) in medical images aims to identify abnormal regions without relying on pixel-level annotations, which is crucial for scalable and label-efficient diagnostic systems. In this paper, we propose a novel…

Image and Video Processing · Electrical Eng. & Systems 2026-02-05 Jiayu Huo , Jingyuan Hong , Liyun Chen

Most state-of-the-art instance segmentation methods have to be trained on densely annotated images. While difficult in general, this requirement is especially daunting for biomedical images, where domain expertise is often required for…

Computer Vision and Pattern Recognition · Computer Science 2022-04-05 Adrian Wolny , Qin Yu , Constantin Pape , Anna Kreshuk

The Segment Anything Model (SAM) was originally designed for label-agnostic mask generation. Does this model also possess inherent semantic understanding, of value to broader visual tasks? In this work we follow a multi-staged approach…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Miguel Espinosa , Chenhongyi Yang , Linus Ericsson , Steven McDonagh , Elliot J. Crowley

DINO models provide rich patch-level representations that have recently enabled strong performance in unsupervised anomaly detection (UAD). Most existing methods extract patch embeddings from ``normal'' images and model them independently,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Ertunc Erdil , Nico Schulthess , Guney Tombak , Ender Konukoglu

DINO and DINOv2 are two model families being widely used to learn representations from unlabeled imagery data at large scales. Their learned representations often enable state-of-the-art performance for downstream tasks, such as image…

Computer Vision and Pattern Recognition · Computer Science 2025-02-17 Ziyang Wu , Jingyuan Zhang , Druv Pai , XuDong Wang , Chandan Singh , Jianwei Yang , Jianfeng Gao , Yi Ma

Unsupervised representation learning seeks to recover latent generative factors, yet standard methods relying on statistical independence often fail to capture causal dependencies. A central challenge is identifiability: as established in…

Machine Learning · Computer Science 2025-12-30 Hans Jarett J. Ong , Brian Godwin S. Lim , Dominic Dayta , Renzo Roel P. Tan , Kazushi Ikeda

Large-scale Pre-Training Vision-Language Model such as CLIP has demonstrated outstanding performance in zero-shot classification, e.g. achieving 76.3% top-1 accuracy on ImageNet without seeing any example, which leads to potential benefits…

Computer Vision and Pattern Recognition · Computer Science 2023-12-15 Xuefeng Hu , Ke Zhang , Lu Xia , Albert Chen , Jiajia Luo , Yuyin Sun , Ken Wang , Nan Qiao , Xiao Zeng , Min Sun , Cheng-Hao Kuo , Ram Nevatia

Deep neural networks usually benefit from unsupervised pre-training, e.g. auto-encoders. However, the classifier further needs supervised fine-tuning methods for good discrimination. Besides, due to the limits of full-connection, the…

Computer Vision and Pattern Recognition · Computer Science 2016-05-10 Hailin Shi , Xiangyu Zhu , Zhen Lei , Shengcai Liao , Stan Z. Li

Exemplar-Free Counting aims to count objects of interest without intensive annotations of objects or exemplars. To achieve this, we propose a Gated Context-Aware Swin-UNet (GCA-SUNet) to directly map an input image to the density map of…

Computer Vision and Pattern Recognition · Computer Science 2025-03-28 Yuzhe Wu , Yipeng Xu , Tianyu Xu , Jialu Zhang , Jianfeng Ren , Xudong Jiang

Contrastive Language-Image Pre-training (CLIP) has made a remarkable breakthrough in open-vocabulary zero-shot image recognition. Many recent studies leverage the pre-trained CLIP models for image-level classification and manipulation. In…

Computer Vision and Pattern Recognition · Computer Science 2022-07-28 Chong Zhou , Chen Change Loy , Bo Dai

This paper tackles the problem of object counting in images. Existing approaches rely on extensive training data with point annotations for each object, making data collection labor-intensive and time-consuming. To overcome this, we propose…

Computer Vision and Pattern Recognition · Computer Science 2023-09-01 Zenglin Shi , Ying Sun , Mengmi Zhang

Nearly all existing counting methods are designed for a specific object class. Our work, however, aims to create a counting model able to count any class of object. To achieve this goal, we formulate counting as a matching problem, enabling…

Computer Vision and Pattern Recognition · Computer Science 2018-11-02 Erika Lu , Weidi Xie , Andrew Zisserman

We propose a novel scalable end-to-end pipeline that uses symbolic domain knowledge as constraints for learning a neural network for classifying unlabeled data in a weak-supervised manner. Our approach is particularly well-suited for…

Machine Learning · Computer Science 2023-10-23 Sudhir Agarwal , Anu Sreepathy , Lalla Mouatadid

Class-agnostic image segmentation is a crucial component in automating image editing workflows, especially in contexts where object selection traditionally involves interactive tools. Existing methods in the literature often adhere to…

Computer Vision and Pattern Recognition · Computer Science 2024-09-23 Sebastian Dille , Ari Blondal , Sylvain Paris , Yağız Aksoy

The CYGNO experiment employs an optical-readout Time Projection Chamber (TPC) to search for rare low-energy interactions using finely resolved scintillation images. While the optical readout provides rich topological information, it…

Contrastive image-text models such as CLIP form the building blocks of many state-of-the-art systems. While they excel at recognizing common generic concepts, they still struggle on fine-grained entities which are rare, or even absent from…

Computer Vision and Pattern Recognition · Computer Science 2024-02-22 Ahmet Iscen , Mathilde Caron , Alireza Fathi , Cordelia Schmid

Instance contrast for unsupervised representation learning has achieved great success in recent years. In this work, we explore the idea of instance contrastive learning in unsupervised domain adaptation (UDA) and propose a novel Category…

Computer Vision and Pattern Recognition · Computer Science 2022-03-18 Jiaxing Huang , Dayan Guan , Aoran Xiao , Shijian Lu , Ling Shao

Self-supervised learning (SSL) models have recently demonstrated remarkable performance across various tasks, including image segmentation. This study delves into the emergent characteristics of the Self-Distillation with No Labels (DINO)…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Joseph A. Gallego-Mejia , Anna Jungbluth , Laura Martínez-Ferrer , Matt Allen , Francisco Dorr , Freddie Kalaitzis , Raúl Ramos-Pollán

Machine unlearning aims to remove information derived from forgotten data while preserving that of the remaining dataset in a well-trained model. With the increasing emphasis on data privacy, several approaches to machine unlearning have…

Machine Learning · Computer Science 2024-05-08 Shaofei Shen , Chenhao Zhang , Yawen Zhao , Alina Bialkowski , Weitong Tony Chen , Miao Xu

Object detectors are typically learned on fully-annotated training data with fixed predefined categories. However, categories are often required to be increased progressively. Usually, only the original training set annotated with old…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Bowen Zhao , Chen Chen , Xi Xiao , Shutao Xia