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Structure information extraction refers to the task of extracting structured text fields from web pages, such as extracting a product offer from a shopping page including product title, description, brand and price. It is an important…

Computation and Language · Computer Science 2022-02-02 Qifan Wang , Yi Fang , Anirudh Ravula , Fuli Feng , Xiaojun Quan , Dongfang Liu

We present a novel method for hierarchical topic detection where topics are obtained by clustering documents in multiple ways. Specifically, we model document collections using a class of graphical models called hierarchical latent tree…

Computation and Language · Computer Science 2016-12-22 Peixian Chen , Nevin L. Zhang , Tengfei Liu , Leonard K. M. Poon , Zhourong Chen , Farhan Khawar

Feature weighting is a technique used to approximate the optimal degree of influence of individual features. This paper presents a feature weighting method for Document Image Retrieval System (DIRS) based on keyword spotting. In this…

Artificial Intelligence · Computer Science 2012-06-11 Mohammadreza Keyvanpour , Reza Tavoli

Content-based image retrieval (CBIR) is one of the most active research areas in multimedia information retrieval. Given a query image, the task is to search relevant images in a repository. Low level features like color, texture, and shape…

Computer Vision and Pattern Recognition · Computer Science 2018-12-12 Asheet Kumar , Shivam Choudhary , Vaibhav Singh Khokhar , Vikas Meena , Chiranjoy Chattopadhyay

Ever growing number of image documents available on the Internet continuously motivates research in better annotation models and more efficient retrieval methods. Formal knowledge representation of objects and events in pictures, their…

Information Retrieval · Computer Science 2017-12-06 Marko Horvat , Anton Grbin , Gordan Gledec

Document retrieval enables users to find their required documents accurately and quickly. To satisfy the requirement of retrieval efficiency, prevalent deep neural methods adopt a representation-based matching paradigm, which saves online…

Information Retrieval · Computer Science 2022-07-12 Mengxue Du , Shasha Li , Jie Yu , Jun Ma , Bin Ji , Huijun Liu , Wuhang Lin , Zibo Yi

Information Retrieval (IR) is an important application area of Natural Language Processing (NLP) where one encounters the genuine challenge of processing large quantities of unrestricted natural language text. While much effort has been…

cmp-lg · Computer Science 2008-02-03 Chengxiang Zhai

AI systems have achieved remarkable success in processing text and relational data, yet visual document processing remains relatively underexplored. Whereas traditional systems require OCR transcriptions to convert these visual documents…

In Information Retrieval (IR), whether implicitly or explicitly, queries and documents are often represented as vectors. However, it may be more beneficial to consider documents and/or queries as multidimensional objects. Our belief is this…

Information Retrieval · Computer Science 2010-02-18 Benjamin Piwowarski , Ingo Frommholz , Mounia Lalmas , Keith van Rijsbergen

Information extraction (IE) for visually-rich documents (VRDs) has achieved SOTA performance recently thanks to the adaptation of Transformer-based language models, which shows the great potential of pre-training methods. In this paper, we…

Artificial Intelligence · Computer Science 2021-07-07 Tuan-Anh D. Nguyen , Hieu M. Vu , Nguyen Hong Son , Minh-Tien Nguyen

This paper introduces and analyzes a search and retrieval model for RAG-like systems under {token} erasures. We provide an information-theoretic analysis of remote document retrieval when query representations are only partially preserved.…

Information Retrieval · Computer Science 2026-04-21 Sara Ghasvarianjahromi , Joshua Barr , Yauhen Yakimenka , Jörg Kliewer

Large Language Models (LLMs) are a class of generative AI models built using the Transformer network, capable of leveraging vast datasets to identify, summarize, translate, predict, and generate language. LLMs promise to revolutionize…

Information Retrieval · Computer Science 2024-03-05 Chunhe Ni , Jiang Wu , Hongbo Wang , Wenran Lu , Chenwei Zhang

Efficient document retrieval heavily relies on the technique of semantic hashing, which learns a binary code for every document and employs Hamming distance to evaluate document distances. However, existing semantic hashing methods are…

Information Retrieval · Computer Science 2022-11-01 Zexuan Qiu , Qinliang Su , Jianxing Yu , Shijing Si

Text documents can be described by a number of abstract concepts such as semantic category, writing style, or sentiment. Machine learning (ML) models have been trained to automatically map documents to these abstract concepts, allowing to…

Computation and Language · Computer Science 2017-11-01 Leila Arras , Franziska Horn , Grégoire Montavon , Klaus-Robert Müller , Wojciech Samek

Semantic text matching is a critical problem in information retrieval. Recently, deep learning techniques have been widely used in this area and obtained significant performance improvements. However, most models are black boxes and it is…

Information Retrieval · Computer Science 2021-08-17 Lijuan Chen , Yanyan Lan , Liang Pang , Jiafeng Guo , Xueqi Cheng

Interactive and non-interactive model are the two de-facto standard frameworks in vector-based cross-lingual information retrieval (V-CLIR), which embed queries and documents in synchronous and asynchronous fashions, respectively. From the…

Computation and Language · Computer Science 2021-11-04 Linlong Xu , Baosong Yang , Xiaoyu Lv , Tianchi Bi , Dayiheng Liu , Haibo Zhang

Text retrieval is a long-standing research topic on information seeking, where a system is required to return relevant information resources to user's queries in natural language. From classic retrieval methods to learning-based ranking…

Information Retrieval · Computer Science 2022-11-29 Wayne Xin Zhao , Jing Liu , Ruiyang Ren , Ji-Rong Wen

A common approach for knowledge-base entity search is to consider an entity as a document with multiple fields. Models that focus on matching query terms in different fields are popular choices for searching such entity representations. An…

Information Retrieval · Computer Science 2019-07-03 Shahrzad Naseri , Sheikh Muhammad Sarwar , James Allan

Retrieving pertinent documents from various data sources with diverse characteristics poses a significant challenge for Document Retrieval Systems. The complexity of this challenge is further compounded when accounting for the semantic…

Information Retrieval · Computer Science 2025-08-29 Apurva Kulkarni , Chandrashekar Ramanathan , Vinu E Venugopal

With the growing popularity of LLM agents and RAG, it has become increasingly important to retrieve documents that are essential for solving a task, even when their connection to the task is indirect or implicit. Addressing this problem…

Information Retrieval · Computer Science 2025-10-14 Junwei Lan , Jianlyu Chen , Zheng Liu , Chaofan Li , Siqi Bao , Defu Lian