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In contextual anomaly detection, an object is only considered anomalous within a specific context. Most existing methods for CAD use a single context based on a set of user-specified contextual features. However, identifying the right…

Machine Learning · Computer Science 2022-10-05 Ece Calikus , Slawomir Nowaczyk , Mohamed-Rafik Bouguelia , Onur Dikmen

Objects, in the real world, rarely occur in isolation and exhibit typical arrangements governed by their independent utility, and their expected interaction with humans and other objects in the context. For example, a chair is expected near…

Computer Vision and Pattern Recognition · Computer Science 2024-11-21 Sharat Agarwal

Noisy pairwise comparison feedback has been incorporated to improve the overall query complexity of interactively learning binary classifiers. The \textit{positivity comparison oracle} is used to provide feedback on which is more likely to…

Machine Learning · Computer Science 2020-10-29 Zhenghang Cui , Issei Sato

It is well-known that visual attention can be tuned in a context-dependent manner to elementary features, such as searching for all redder items or the reddest item, supporting a relational theory of visual attention. However, in previous…

Neurons and Cognition · Quantitative Biology 2023-01-10 Zachary Hamblin-Frohman , Koralalage Don Raveen Amarasekera , Stefanie I. Becker

Neural coreference resolution models trained on one dataset may not transfer to new, low-resource domains. Active learning mitigates this problem by sampling a small subset of data for annotators to label. While active learning is…

Computation and Language · Computer Science 2022-03-30 Michelle Yuan , Patrick Xia , Chandler May , Benjamin Van Durme , Jordan Boyd-Graber

We consider two active binary-classification problems with atypical objectives. In the first, active search, our goal is to actively uncover as many members of a given class as possible. In the second, active surveying, our goal is to…

Machine Learning · Computer Science 2016-11-11 Roman Garnett , Yamuna Krishnamurthy , Xuehan Xiong , Jeff Schneider , Richard Mann

Visual Question Answering (VQA) is a challenging multimodal task to answer questions about an image. Many works concentrate on how to reduce language bias which makes models answer questions ignoring visual content and language context.…

Computer Vision and Pattern Recognition · Computer Science 2020-12-22 Chao Yang , Su Feng , Dongsheng Li , Huawei Shen , Guoqing Wang , Bin Jiang

Active learning approaches in computer vision generally involve querying strong labels for data. However, previous works have shown that weak supervision can be effective in training models for vision tasks while greatly reducing annotation…

Computer Vision and Pattern Recognition · Computer Science 2019-10-16 Sai Vikas Desai , Akshay L Chandra , Wei Guo , Seishi Ninomiya , Vineeth N Balasubramanian

Conversational retrieval refers to an information retrieval system that operates in an iterative and interactive manner, requiring the retrieval of various external resources, such as persona, knowledge, and even response, to effectively…

Computation and Language · Computer Science 2024-02-29 Hongru Wang , Boyang Xue , Baohang Zhou , Rui Wang , Fei Mi , Weichao Wang , Yasheng Wang , Kam-Fai Wong

The best algorithm for a computational problem generally depends on the "relevant inputs," a concept that depends on the application domain and often defies formal articulation. While there is a large literature on empirical approaches to…

Machine Learning · Computer Science 2016-09-06 Rishi Gupta , Tim Roughgarden

Learning to rank has been intensively studied and widely applied in information retrieval. Typically, a global ranking function is learned from a set of labeled data, which can achieve good performance on average but may be suboptimal for…

Information Retrieval · Computer Science 2018-04-25 Qingyao Ai , Keping Bi , Jiafeng Guo , W. Bruce Croft

We address challenges of active learning under scarce informational resources in non-stationary environments. In real-world settings, data labeled and integrated into a predictive model may become invalid over time. However, the data can…

Machine Learning · Computer Science 2012-06-26 Ashish Kapoor , Eric J. Horvitz

We propose a learning setting in which unlabeled data is free, and the cost of a label depends on its value, which is not known in advance. We study binary classification in an extreme case, where the algorithm only pays for negative…

Machine Learning · Computer Science 2015-07-14 Sivan Sabato , Anand D. Sarwate , Nathan Srebro

We present a new algorithm for the contextual bandit learning problem, where the learner repeatedly takes one of $K$ actions in response to the observed context, and observes the reward only for that chosen action. Our method assumes access…

Machine Learning · Computer Science 2014-10-15 Alekh Agarwal , Daniel Hsu , Satyen Kale , John Langford , Lihong Li , Robert E. Schapire

The goal of meta-learning is to learn to adapt to a new task with only a few labeled examples. To tackle this problem in NLP, we propose $\textit{in-context tuning}$, which recasts adaptation and prediction as a simple sequence prediction…

Computation and Language · Computer Science 2022-04-13 Yanda Chen , Ruiqi Zhong , Sheng Zha , George Karypis , He He

An important problem for HCI researchers is to estimate the parameter values of a cognitive model from behavioral data. This is a difficult problem, because of the substantial complexity and variety in human behavioral strategies. We report…

Human-Computer Interaction · Computer Science 2017-01-16 Antti Kangasrääsiö , Kumaripaba Athukorala , Andrew Howes , Jukka Corander , Samuel Kaski , Antti Oulasvirta

Preference-based feedback is important for many applications where direct evaluation of a reward function is not feasible. A notable recent example arises in reinforcement learning from human feedback on large language models. For many of…

Machine Learning · Computer Science 2023-07-24 Viraj Mehta , Ojash Neopane , Vikramjeet Das , Sen Lin , Jeff Schneider , Willie Neiswanger

Recently, knowledge-grounded conversations in the open domain gain great attention from researchers. Existing works on retrieval-based dialogue systems have paid tremendous efforts to utilize neural networks to build a matching model, where…

Computation and Language · Computer Science 2025-09-30 Kai Hua , Zhiyuan Feng , Chongyang Tao , Rui Yan , Lu Zhang

In this work, we introduce and study contextual search in general principal-agent games, where a principal repeatedly interacts with agents by offering contracts based on contextual information and historical feedback, without knowing the…

Computer Science and Game Theory · Computer Science 2025-10-22 Yiding Feng , Mengfan Ma , Bo Peng , Zongqi Wan

Reliance on vast annotations to achieve leading performance severely restricts the practicality of large-scale point cloud semantic segmentation. For the purpose of reducing data annotation costs, effective labeling schemes are developed…

Computer Vision and Pattern Recognition · Computer Science 2022-11-24 Puzuo Wang , Wei Yao , Jie Shao