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Tremendous efforts have been made on instance segmentation but the mask quality is still not satisfactory. The boundaries of predicted instance masks are usually imprecise due to the low spatial resolution of feature maps and the imbalance…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Chufeng Tang , Hang Chen , Xiao Li , Jianmin Li , Zhaoxiang Zhang , Xiaolin Hu

The Visual Inductive Priors(VIPriors) for Data-Efficient Computer Vision challenges ask competitors to train models from scratch in a data-deficient setting. In this paper, we introduce the technical details of our submission to the…

Computer Vision and Pattern Recognition · Computer Science 2021-12-03 Bo Yan , Fengliang Qi , Leilei Cao , Hongbin Wang

The long-tailed distribution is a common phenomenon in the real world. Extracted large scale image datasets inevitably demonstrate the long-tailed property and models trained with imbalanced data can obtain high performance for the…

Computer Vision and Pattern Recognition · Computer Science 2023-10-18 Konstantinos Panagiotis Alexandridis , Shan Luo , Anh Nguyen , Jiankang Deng , Stefanos Zafeiriou

This paper introduces a two-stage framework designed to enhance long-tail class incremental learning, enabling the model to progressively learn new classes, while mitigating catastrophic forgetting in the context of long-tailed data…

Computer Vision and Pattern Recognition · Computer Science 2023-11-03 Jayateja Kalla , Soma Biswas

In this technical report, we present key details of our winning panoptic segmentation architecture EffPS_b1bs4_RVC. Our network is a lightweight version of our state-of-the-art EfficientPS architecture that consists of our proposed shared…

Computer Vision and Pattern Recognition · Computer Science 2020-08-25 Rohit Mohan , Abhinav Valada

Imbalanced classification datasets pose significant challenges in machine learning, often leading to biased models that perform poorly on underrepresented classes. With the rise of foundation models, recent research has focused on the full,…

Machine Learning · Computer Science 2025-09-22 Nakul Sharma

This report describes the winning solution to the Robust Vision Challenge (RVC) semantic segmentation track at ECCV 2022. Our method adopts the FAN-B-Hybrid model as the encoder and uses SegFormer as the segmentation framework. The model is…

Computer Vision and Pattern Recognition · Computer Science 2022-11-08 Junfei Xiao , Zhichao Xu , Shiyi Lan , Zhiding Yu , Alan Yuille , Anima Anandkumar

The long-tail distribution of the visual world poses great challenges for deep learning based classification models on how to handle the class imbalance problem. Existing solutions usually involve class-balancing strategies, e.g., by loss…

Computer Vision and Pattern Recognition · Computer Science 2020-02-20 Bingyi Kang , Saining Xie , Marcus Rohrbach , Zhicheng Yan , Albert Gordo , Jiashi Feng , Yannis Kalantidis

Deploying deep models in real-world scenarios entails a number of challenges, including computational efficiency and real-world (e.g., long-tailed) data distributions. We address the combined challenge of learning long-tailed distributions…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Jihun Kim , Dahyun Kim , Hyungrok Jung , Taeil Oh , Jonghyun Choi

Several approaches have been proposed in recent literature to alleviate the long-tail problem, mainly in object classification tasks. In this paper, we make the first large-scale study concerning the task of Long-Tail Visual Relationship…

Computer Vision and Pattern Recognition · Computer Science 2021-09-28 Sherif Abdelkarim , Aniket Agarwal , Panos Achlioptas , Jun Chen , Jiaji Huang , Boyang Li , Kenneth Church , Mohamed Elhoseiny

The task of referring video object segmentation aims to segment the object in the frames of a given video to which the referring expressions refer. Previous methods adopt multi-stage approach and design complex pipelines to obtain promising…

Computer Vision and Pattern Recognition · Computer Science 2023-01-02 Zhiwei Hu , Bo Chen , Yuan Gao , Zhilong Ji , Jinfeng Bai

The problem of video object segmentation can become extremely challenging when multiple instances co-exist. While each instance may exhibit large scale and pose variations, the problem is compounded when instances occlude each other causing…

Computer Vision and Pattern Recognition · Computer Science 2018-03-15 Xiaoxiao Li , Chen Change Loy

Real-world datasets follow an imbalanced distribution, which poses significant challenges in rare-category object detection. Recent studies tackle this problem by developing re-weighting and re-sampling methods, that utilise the class…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Konstantinos Panagiotis Alexandridis , Ismail Elezi , Jiankang Deng , Anh Nguyen , Shan Luo

Training on datasets with long-tailed distributions has been challenging for major recognition tasks such as classification and detection. To deal with this challenge, image resampling is typically introduced as a simple but effective…

Computer Vision and Pattern Recognition · Computer Science 2021-10-20 Nadine Chang , Zhiding Yu , Yu-Xiong Wang , Anima Anandkumar , Sanja Fidler , Jose M. Alvarez

Large-scale Video Object Segmentation (LSVOS) addresses the challenge of accurately tracking and segmenting objects in long video sequences, where difficulties stem from object reappearance, small-scale targets, heavy occlusions, and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Yujie Xie , Hongyang Zhang , Zhihui Liu , Shihai Ruan

This report presents our winning solution to the 5th PVUW MeViS-Text Challenge. The track studies referring video object segmentation under motion-centric language expressions, where the model must jointly understand appearance, temporal…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Xusheng He , Canyang Wu , Jinrong Zhang , Weili Guan , Jianlong Wu , Liqiang Nie

Long-tailed imbalance distribution is a common issue in practical computer vision applications. Previous works proposed methods to address this problem, which can be categorized into several classes: re-sampling, re-weighting, transfer…

Computer Vision and Pattern Recognition · Computer Science 2024-04-24 Pengxiao Han , Changkun Ye , Jieming Zhou , Jing Zhang , Jie Hong , Xuesong Li

Clinical classification of chest radiography is particularly challenging for standard machine learning algorithms due to its inherent long-tailed and multi-label nature. However, few attempts take into account the coupled challenges posed…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Feng Hong , Tianjie Dai , Jiangchao Yao , Ya Zhang , Yanfeng Wang

Data in the real world tends to exhibit a long-tailed label distribution, which poses great challenges for the training of neural networks in visual recognition. Existing methods tackle this problem mainly from the perspective of data…

Computer Vision and Pattern Recognition · Computer Science 2021-09-24 Yan Zhao , Weicong Chen , Xu Tan , Kai Huang , Jihong Zhu

Long-tail class incremental learning (LT CIL) remains highly challenging because the scarcity of samples in tail classes not only hampers their learning but also exacerbates catastrophic forgetting under continuously evolving and imbalanced…

Artificial Intelligence · Computer Science 2026-03-24 Xi Wang , Xu Yang , Donghao Sun , Cheng Deng