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We propose an embarrassingly simple point annotation scheme to collect weak supervision for instance segmentation. In addition to bounding boxes, we collect binary labels for a set of points uniformly sampled inside each bounding box. We…

Computer Vision and Pattern Recognition · Computer Science 2022-06-17 Bowen Cheng , Omkar Parkhi , Alexander Kirillov

We study the problem of weakly semi-supervised object detection with points (WSSOD-P), where the training data is combined by a small set of fully annotated images with bounding boxes and a large set of weakly-labeled images with only a…

Computer Vision and Pattern Recognition · Computer Science 2022-05-13 Shilong Zhang , Zhuoran Yu , Liyang Liu , Xinjiang Wang , Aojun Zhou , Kai Chen

Long short-term memory (LSTM) recurrent neural networks (RNNs) have been shown to give state-of-the-art performance on many speech recognition tasks, as they are able to provide the learned dynamically changing contextual window of all…

Computation and Language · Computer Science 2016-10-12 Xiangang Li , Xihong Wu

The long-tailed distribution datasets poses great challenges for deep learning based classification models on how to handle the class imbalance problem. Existing solutions usually involve class-balacing strategies or transfer learing from…

Computer Vision and Pattern Recognition · Computer Science 2022-04-21 Gongzhe Li , Zhiwen Tan , Linpeng Pan

Instance segmentation is a promising yet challenging topic in computer vision. Recent approaches such as Mask R-CNN typically divide this problem into two parts -- a detection component and a mask generation branch, and mostly focus on the…

Computer Vision and Pattern Recognition · Computer Science 2019-09-30 Shichao Xu , Shuyue Lan , Qi Zhu

Long-tailed classification is challenging due to its heavy imbalance in class probabilities. While existing methods often focus on overall accuracy or accuracy for tail classes, they overlook a critical aspect: certain types of errors can…

Machine Learning · Computer Science 2025-01-27 Bolian Li , Ruqi Zhang

The world is long-tailed. What does this mean for computer vision and visual recognition? The main two implications are (1) the number of categories we need to consider in applications can be very large, and (2) the number of training…

Computer Vision and Pattern Recognition · Computer Science 2017-09-06 Grant Van Horn , Pietro Perona

Real-world data is extremely imbalanced and presents a long-tailed distribution, resulting in models that are biased towards classes with sufficient samples and perform poorly on rare classes. Recent methods propose to rebalance classes but…

Computer Vision and Pattern Recognition · Computer Science 2023-11-02 Weiqi Li , Fan Lyu , Fanhua Shang , Liang Wan , Wei Feng

Small object detection in intricate environments has consistently represented a major challenge in the field of object detection. In this paper, we identify that this difficulty stems from the detectors' inability to effectively learn…

Computer Vision and Pattern Recognition · Computer Science 2025-05-23 Yichen Li , Qiankun Liu , Zhenchao Jin , Jiuzhe Wei , Jing Nie , Ying Fu

To protect tropical forest biodiversity, we need to be able to detect it reliably, cheaply, and at scale. Automated species detection from passively recorded soundscapes via machine-learning approaches is a promising technique towards this…

Machine Learning · Computer Science 2022-10-18 Yuren Sun , Tatiana Midori Maeda , Claudia Solis-Lemus , Daniel Pimentel-Alarcon , Zuzana Burivalova

Long-tailed distributions in class-imbalanced data present a fundamental challenge for deep learning models, which tend to be biased toward majority classes. While recent methods for long-tailed recognition have mitigated this issue, they…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Heegeon Yoon , Heeyoung Kim

We propose Cos R-CNN, a simple exemplar-based R-CNN formulation that is designed for online few-shot object detection. That is, it is able to localise and classify novel object categories in images with few examples without fine-tuning. Cos…

Computer Vision and Pattern Recognition · Computer Science 2023-07-26 Gratianus Wesley Putra Data , Henry Howard-Jenkins , David Murray , Victor Prisacariu

We present a new, embarrassingly simple approach to instance segmentation in images. Compared to many other dense prediction tasks, e.g., semantic segmentation, it is the arbitrary number of instances that have made instance segmentation…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Xinlong Wang , Tao Kong , Chunhua Shen , Yuning Jiang , Lei Li

The labeling cost of large number of bounding boxes is one of the main challenges for training modern object detectors. To reduce the dependence on expensive bounding box annotations, we propose a new semi-supervised object detection…

Computer Vision and Pattern Recognition · Computer Science 2018-12-04 JIyang Gao , Jiang Wang , Shengyang Dai , Li-Jia Li , Ram Nevatia

Many objects do not appear frequently enough in complex scenes (e.g., certain handbags in living rooms) for training an accurate object detector, but are often found frequently by themselves (e.g., in product images). Yet, these…

Computer Vision and Pattern Recognition · Computer Science 2021-09-14 Cheng Zhang , Tai-Yu Pan , Yandong Li , Hexiang Hu , Dong Xuan , Soravit Changpinyo , Boqing Gong , Wei-Lun Chao

The long-tailed image classification task remains important in the development of deep neural networks as it explicitly deals with large imbalances in the class frequencies of the training data. While uncommon in engineered datasets, this…

Computer Vision and Pattern Recognition · Computer Science 2023-07-12 Marc-Antoine Lavoie , Steven Waslander

Instance segmentation is a core computer vision task with great practical significance. Recent advances, driven by large-scale benchmark datasets, have yielded good general-purpose Convolutional Neural Network (CNN)-based methods. Natural…

Computer Vision and Pattern Recognition · Computer Science 2024-10-11 Przemyslaw Polewski , Jacquelyn Shelton , Wei Yao , Marco Heurich

Imbalanced music genre classification is a crucial task in the Music Information Retrieval (MIR) field for identifying the long-tail, data-poor genre based on the related music audio segments, which is very prevalent in real-world…

Sound · Computer Science 2022-09-12 Xiaokai Liu , Menghua Zhang

High-density object counting in surveillance scenes is challenging mainly due to the drastic variation of object scales. The prevalence of deep learning has largely boosted the object counting accuracy on several benchmark datasets.…

Computer Vision and Pattern Recognition · Computer Science 2019-04-09 Muming Zhao , Jian Zhang , Chongyang Zhang , Wenjun Zhang

Despite recent advancements in out-of-distribution (OOD) detection, most current studies assume a class-balanced in-distribution training dataset, which is rarely the case in real-world scenarios. This paper addresses the challenging task…

Machine Learning · Computer Science 2023-12-15 Tong Wei , Bo-Lin Wang , Min-Ling Zhang