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We address the problem of unsupervised semantic segmentation of outdoor LiDAR point clouds in diverse traffic scenarios. The key idea is to leverage the spatiotemporal nature of a dynamic point cloud sequence and introduce drastically…

计算机视觉与模式识别 · 计算机科学 2023-08-25 Xiao Li , Pan He , Aotian Wu , Sanjay Ranka , Anand Rangarajan

Data sparsity is an inherent challenge in the recommender systems, where most of the data is collected from the implicit feedbacks of users. This causes two difficulties in designing effective algorithms: first, the majority of users only…

信息检索 · 计算机科学 2020-07-15 Wenhui Yu , Xiao Lin , Junfeng Ge , Wenwu Ou , Zheng Qin

Distantly-Supervised Named Entity Recognition (DS-NER) is widely used in real-world scenarios. It can effectively alleviate the burden of annotation by matching entities in existing knowledge bases with snippets in the text but suffer from…

计算与语言 · 计算机科学 2025-07-04 Shuzheng Si , Helan Hu , Haozhe Zhao , Shuang Zeng , Kaikai An , Zefan Cai , Baobao Chang

Recent semi-supervised learning (SSL) methods are commonly based on pseudo labeling. Since the SSL performance is greatly influenced by the quality of pseudo labels, mutual learning has been proposed to effectively suppress the noises in…

计算机视觉与模式识别 · 计算机科学 2021-12-28 Pan Zhang , Bo Zhang , Ting Zhang , Dong Chen , Fang Wen

Distant supervision for relation extraction enables one to effectively acquire structured relations out of very large text corpora with less human efforts. Nevertheless, most of the prior-art models for such tasks assume that the given text…

计算与语言 · 计算机科学 2019-09-13 Junfan Chen , Richong Zhang , Yongyi Mao , Hongyu Guo , Jie Xu

To alleviate human efforts from obtaining large-scale annotations, Semi-Supervised Relation Extraction methods aim to leverage unlabeled data in addition to learning from limited samples. Existing self-training methods suffer from the…

计算与语言 · 计算机科学 2021-09-13 Xuming Hu , Chenwei Zhang , Fukun Ma , Chenyao Liu , Lijie Wen , Philip S. Yu

Sparse coding approximates the data sample as a sparse linear combination of some basic codewords and uses the sparse codes as new presentations. In this paper, we investigate learning discriminative sparse codes by sparse coding in a…

机器学习 · 统计学 2015-01-19 Jim Jing-Yan Wang , Xin Gao

Semantic correspondence aims to identify semantically meaningful relationships between different images and is a fundamental challenge in computer vision. It forms the foundation for numerous tasks such as 3D reconstruction, object…

计算机视觉与模式识别 · 计算机科学 2025-08-04 Wenyue Chong

A common challenge posed to robust semantic segmentation is the expensive data annotation cost. Existing semi-supervised solutions show great potential for solving this problem. Their key idea is constructing consistency regularization with…

计算机视觉与模式识别 · 计算机科学 2022-09-28 Cong Cao , Tianwei Lin , Dongliang He , Fu Li , Huanjing Yue , Jingyu Yang , Errui Ding

We motivate weakly supervised learning as an effective learning paradigm for problems where curating perfectly annotated datasets is expensive and may require domain expertise such as fine-grained classification. We focus on Partial Label…

计算机视觉与模式识别 · 计算机科学 2025-06-09 Darshana Saravanan , Naresh Manwani , Vineet Gandhi

The recent success of deep learning is mostly due to the availability of big datasets with clean annotations. However, gathering a cleanly annotated dataset is not always feasible due to practical challenges. As a result, label noise is a…

计算机视觉与模式识别 · 计算机科学 2020-03-25 Görkem Algan , İlkay Ulusoy

Pseudo-labelling is a popular technique in unsuper-vised domain adaptation for semantic segmentation. However, pseudo labels are noisy and inevitably have confirmation bias due to the discrepancy between source and target domains and…

计算机视觉与模式识别 · 计算机科学 2022-04-15 Wanyu Xu , Zengmao Wang , Wei Bian

We study the problem of learning neural text classifiers without using any labeled data, but only easy-to-provide rules as multiple weak supervision sources. This problem is challenging because rule-induced weak labels are often noisy and…

计算与语言 · 计算机科学 2021-03-12 Wendi Ren , Yinghao Li , Hanting Su , David Kartchner , Cassie Mitchell , Chao Zhang

Since the preparation of labeled data for training semantic segmentation networks of point clouds is a time-consuming process, weakly supervised approaches have been introduced to learn from only a small fraction of data. These methods are…

计算机视觉与模式识别 · 计算机科学 2022-09-16 Gengxin Liu , Oliver van Kaick , Hui Huang , Ruizhen Hu

Deep supervised hashing has emerged as an influential solution to large-scale semantic image retrieval problems in computer vision. In the light of recent progress, convolutional neural network based hashing methods typically seek pair-wise…

计算机视觉与模式识别 · 计算机科学 2018-03-13 Xuefei Zhe , Shifeng Chen , Hong Yan

Annotation burden has become one of the biggest barriers to semantic segmentation. Approaches based on click-level annotations have therefore attracted increasing attention due to their superior trade-off between supervision and annotation…

计算机视觉与模式识别 · 计算机科学 2021-08-31 Hongjun Chen , Jinbao Wang , Hong Cai Chen , Xiantong Zhen , Feng Zheng , Rongrong Ji , Ling Shao

3D semantic scene understanding tasks have achieved great success with the emergence of deep learning, but often require a huge amount of manually annotated training data. To alleviate the annotation cost, we propose the first…

计算机视觉与模式识别 · 计算机科学 2023-08-04 Shichao Dong , Guosheng Lin

In this paper, we investigate the problem of learning with noisy labels in real-world annotation scenarios, where noise can be categorized into two types: factual noise and ambiguity noise. To better distinguish these noise types and…

机器学习 · 计算机科学 2023-08-23 Renyu Zhu , Haoyu Liu , Runze Wu , Minmin Lin , Tangjie Lv , Changjie Fan , Haobo Wang

Medical image segmentation typically necessitates a large and precisely annotated dataset. However, obtaining pixel-wise annotation is a labor-intensive task that requires significant effort from domain experts, making it challenging to…

计算机视觉与模式识别 · 计算机科学 2023-08-01 Heng Cai , Lei Qi , Qian Yu , Yinghuan Shi , Yang Gao

High-quality pixel-level annotations are essential for the semantic segmentation of remote sensing imagery. However, such labels are expensive to obtain and often affected by noise due to the labor-intensive and time-consuming nature of…