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Retrieval-Augmented Generation (RAG) systems lose retrieval accuracy when similar documents coexist in the vector database, causing unnecessary information, hallucinations, and factual errors. To alleviate this issue, we propose CHOP, a…

Computation and Language · Computer Science 2026-04-20 Hyunseok Park , Jihyeon Kim , Jongeun Kim , Dongsik Yoon

As the Internet grows in size, so does the amount of text based information that exists. For many application spaces it is paramount to isolate and identify texts that relate to a particular topic. While one-class classification would be…

Artificial Intelligence · Computer Science 2021-11-02 Sameer Khanna

Hierarchical neural architectures are often used to capture long-distance dependencies and have been applied to many document-level tasks such as summarization, document segmentation, and sentiment analysis. However, effective usage of such…

Computation and Language · Computer Science 2019-01-29 Ming-Wei Chang , Kristina Toutanova , Kenton Lee , Jacob Devlin

We present an end-to-end trainable deep convolutional neural network (DCNN) for semantic segmentation with built-in awareness of semantically meaningful boundaries. Semantic segmentation is a fundamental remote sensing task, and most…

Computer Vision and Pattern Recognition · Computer Science 2017-12-25 Dimitrios Marmanis , Konrad Schindler , Jan Dirk Wegner , Silvano Galliani , Mihai Datcu , Uwe Stilla

Extracting top-k keywords and documents using weighting schemes are popular techniques employed in text mining and machine learning for different analysis and retrieval tasks. The weights are usually computed in the data preprocessing step,…

Databases · Computer Science 2021-08-23 Ciprian-Octavian Truica , Elena Apostol , Jérôme Darmont , Ira Assent

Retrieval augmented generation (RAG) has been widely adopted to help Large Language Models (LLMs) to process tasks involving long documents. However, existing retrieval models are not designed for long document retrieval and fail to address…

Information Retrieval · Computer Science 2026-02-13 David Jiahao Fu , Lam Thanh Do , Jiayu Li , Kevin Chen-Chuan Chang

Search engine has become a fundamental component in various web and mobile applications. Retrieving relevant documents from the massive datasets is challenging for a search engine system, especially when faced with verbose or tail queries.…

Information Retrieval · Computer Science 2020-08-11 Kuan Fang , Long Zhao , Zhan Shen , RuiXing Wang , RiKang Zhour , LiWen Fan

With the explosive development of mobile Internet, short text has been applied extensively. The difference between classifying short text and long documents is that short text is of shortness and sparsity. Thus, it is challenging to deal…

Computation and Language · Computer Science 2020-01-08 Yanxuan Li

Distributed dense word vectors have been shown to be effective at capturing token-level semantic and syntactic regularities in language, while topic models can form interpretable representations over documents. In this work, we describe…

Computation and Language · Computer Science 2016-05-09 Christopher E Moody

Hierarchical topic models such as the gamma belief network (GBN) have delivered promising results in mining multi-layer document representations and discovering interpretable topic taxonomies. However, they often assume in the prior that…

Information Retrieval · Computer Science 2021-07-07 Zhibin Duan , Dongsheng Wang , Bo Chen , Chaojie Wang , Wenchao Chen , Yewen Li , Jie Ren , Mingyuan Zhou

As the number of documents on the web is growing exponentially, multi-document summarization is becoming more and more important since it can provide the main ideas in a document set in short time. In this paper, we present an unsupervised…

Computation and Language · Computer Science 2018-06-12 Kaustubh Mani , Ishan Verma , Hardik Meisheri , Lipika Dey

Document image classification is different from plain-text document classification and consists of classifying a document by understanding the content and structure of documents such as forms, emails, and other such documents. We show that…

Computation and Language · Computer Science 2023-10-26 Yoshinari Fujinuma , Siddharth Varia , Nishant Sankaran , Srikar Appalaraju , Bonan Min , Yogarshi Vyas

Topic modeling is a widely used technique for revealing underlying thematic structures within textual data. However, existing models have certain limitations, particularly when dealing with short text datasets that lack co-occurring words.…

Artificial Intelligence · Computer Science 2023-12-18 Han Wang , Nirmalendu Prakash , Nguyen Khoi Hoang , Ming Shan Hee , Usman Naseem , Roy Ka-Wei Lee

Multimodal document understanding is a challenging task to process and comprehend large amounts of textual and visual information. Recent advances in Large Language Models (LLMs) have significantly improved the performance of this task.…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Xudong Xie , Hao Yan , Liang Yin , Yang Liu , Jing Ding , Minghui Liao , Yuliang Liu , Wei Chen , Xiang Bai

Document and discourse segmentation are two fundamental NLP tasks pertaining to breaking up text into constituents, which are commonly used to help downstream tasks such as information retrieval or text summarization. In this work, we…

Computation and Language · Computer Science 2020-12-08 Michal Lukasik , Boris Dadachev , Gonçalo Simões , Kishore Papineni

Recent advancements in autoregressive and diffusion models have led to strong performance in image generation with short scene text words. However, generating coherent, long-form text in images, such as paragraphs in slides or documents,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Alex Jinpeng Wang , Linjie Li , Zhengyuan Yang , Lijuan Wang , Min Li

Semantic annotations have to satisfy quality constraints to be useful for digital libraries, which is particularly challenging on large and diverse datasets. Confidence scores of multi-label classification methods typically refer only to…

Information Retrieval · Computer Science 2018-06-08 Martin Toepfer , Christin Seifert

Lengthy documents pose a unique challenge to neural language models due to substantial memory consumption. While existing state-of-the-art (SOTA) models segment long texts into equal-length snippets (e.g., 128 tokens per snippet) or deploy…

Computation and Language · Computer Science 2024-05-14 Guangzeng Han , Jack Tsao , Xiaolei Huang

Neural document retrieval often treats a corpus as a flat cloud of vectors scored at a single granularity, leaving corpus structure underused and explanations opaque. We use Cobweb--a hierarchy-aware framework--to organize sentence…

Computation and Language · Computer Science 2026-04-17 Anant Gupta , Karthik Singaravadivelan , Zekun Wang

Document AI is a growing research field that focuses on the comprehension and extraction of information from scanned and digital documents to make everyday business operations more efficient. Numerous downstream tasks and datasets have been…

Computation and Language · Computer Science 2024-01-29 Ahmed Masry , Amir Hajian
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