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Medical image segmentation, or computing voxelwise semantic masks, is a fundamental yet challenging task to compute a voxel-level semantic mask. To increase the ability of encoder-decoder neural networks to perform this task across large…

Computer Vision and Pattern Recognition · Computer Science 2021-11-10 Ho Hin Lee , Yucheng Tang , Qi Yang , Xin Yu , Shunxing Bao , Leon Y. Cai , Lucas W. Remedios , Bennett A. Landman , Yuankai Huo

Weakly supervised temporal action localization (WSTAL) aims to localize actions in untrimmed videos using video-level labels. Despite recent advances, existing approaches mainly follow a localization-by-classification pipeline, generally…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Songchun Zhang , Chunhui Zhao

We study weakly-supervised video object grounding: given a video segment and a corresponding descriptive sentence, the goal is to localize objects that are mentioned from the sentence in the video. During training, no object bounding boxes…

Computer Vision and Pattern Recognition · Computer Science 2018-07-23 Luowei Zhou , Nathan Louis , Jason J. Corso

One-stage object detectors such as the YOLO family achieve state-of-the-art performance in real-time vision applications but remain heavily reliant on large-scale labeled datasets for training. In this work, we present a systematic study of…

Computer Vision and Pattern Recognition · Computer Science 2025-08-05 Manikanta Kotthapalli , Reshma Bhatia , Nainsi Jain

Existing Camouflaged Object Detection (COD) methods rely heavily on large-scale pixel-annotated training sets, which are both time-consuming and labor-intensive. Although weakly supervised methods offer higher annotation efficiency, their…

Computer Vision and Pattern Recognition · Computer Science 2024-07-19 Jin Zhang , Ruiheng Zhang , Yanjiao Shi , Zhe Cao , Nian Liu , Fahad Shahbaz Khan

Weakly supervised object detection (WSOD) is a challenging task that requires simultaneously learn object classifiers and estimate object locations under the supervision of image category labels. A major line of WSOD methods roots in…

Computer Vision and Pattern Recognition · Computer Science 2022-05-06 Shiwei Zhang , Wei Ke , Lin Yang

Weakly supervised person search aims to perform joint pedestrian detection and re-identification (re-id) with only person bounding-box annotations. Recently, the idea of contrastive learning is initially applied to weakly supervised person…

Computer Vision and Pattern Recognition · Computer Science 2024-01-09 Jiabei Wang , Yanwei Pang , Jiale Cao , Hanqing Sun , Zhuang Shao , Xuelong Li

Semi-supervised learning methods have shown promising results in solving many practical problems when only a few labels are available. The existing methods assume that the class distributions of labeled and unlabeled data are equal;…

Machine Learning · Computer Science 2024-08-06 Min Gu Kwak , Hyungu Kahng , Seoung Bum Kim

Weakly-Supervised Object Detection (WSOD) and Localization (WSOL), i.e., detecting multiple and single instances with bounding boxes in an image using image-level labels, are long-standing and challenging tasks in the CV community. With the…

Computer Vision and Pattern Recognition · Computer Science 2021-05-27 Feifei Shao , Long Chen , Jian Shao , Wei Ji , Shaoning Xiao , Lu Ye , Yueting Zhuang , Jun Xiao

Most existing crowd counting methods require object location-level annotation, i.e., placing a dot at the center of an object. While being simpler than the bounding-box or pixel-level annotation, obtaining this annotation is still…

Computer Vision and Pattern Recognition · Computer Science 2020-03-03 Yinjie Lei , Yan Liu , Pingping Zhang , Lingqiao Liu

Emerging interests have been brought to recognize previously unseen objects given very few training examples, known as few-shot object detection (FSOD). Recent researches demonstrate that good feature embedding is the key to reach favorable…

Computer Vision and Pattern Recognition · Computer Science 2021-03-16 Bo Sun , Banghuai Li , Shengcai Cai , Ye Yuan , Chi Zhang

Annotation of large-scale 3D data is notoriously cumbersome and costly. As an alternative, weakly-supervised learning alleviates such a need by reducing the annotation by several order of magnitudes. We propose COARSE3D, a novel…

Computer Vision and Pattern Recognition · Computer Science 2022-10-11 Rong Li , Anh-Quan Cao , Raoul de Charette

Visual domain gaps often impact object detection performance. Image-to-image translation can mitigate this effect, where contrastive approaches enable learning of the image-to-image mapping under unsupervised regimes. However, existing…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Danai Triantafyllidou , Sarah Parisot , Ales Leonardis , Steven McDonagh

Contrastive learning is a discriminative approach that aims at grouping similar samples closer and diverse samples far from each other. It it an efficient technique to train an encoder generating distinguishable and informative…

Computer Vision and Pattern Recognition · Computer Science 2021-07-19 Qing Chen , Jian Zhang

Self-supervised learning is a machine learning approach that generates implicit labels by learning underlined patterns and extracting discriminative features from unlabeled data without manual labelling. Contrastive learning introduces the…

Computer Vision and Pattern Recognition · Computer Science 2025-10-13 Asifullah Khan , Laiba Asmatullah , Anza Malik , Shahzaib Khan , Hamna Asif

Contrastive learning is commonly used as a method of self-supervised learning with the "anchor" and "positive" being two random augmentations of a given input image, and the "negative" is the set of all other images. However, the…

Computer Vision and Pattern Recognition · Computer Science 2022-08-16 Rishab Balasubramanian , Kunal Rathore

Infrared small object detection urgently requires semi-supervised paradigms due to the high cost of annotation. However, existing methods like SAM face significant challenges of domain gaps, inability of encoding physical priors, and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Zihan Liu , Xiangning Ren , Dezhang Kong , Yipeng Zhang , Meng Han

We present Momentum Contrast (MoCo) for unsupervised visual representation learning. From a perspective on contrastive learning as dictionary look-up, we build a dynamic dictionary with a queue and a moving-averaged encoder. This enables…

Computer Vision and Pattern Recognition · Computer Science 2020-03-25 Kaiming He , Haoqi Fan , Yuxin Wu , Saining Xie , Ross Girshick

In this paper, we explore contrastive learning for few-shot classification, in which we propose to use it as an additional auxiliary training objective acting as a data-dependent regularizer to promote more general and transferable…

Computer Vision and Pattern Recognition · Computer Science 2021-06-22 Yassine Ouali , Céline Hudelot , Myriam Tami

Appearance-based gaze estimation always suffers from poor generalization due to limited annotated samples and insufficient dataset diversity. Leading approaches adopt weakly supervised learning to generate large-scale pseudo-labeled data…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Qida Tan , Hongyu Yang , Wenchao Du