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Diverse Natural Language Processing tasks employ constituency parsing to understand the syntactic structure of a sentence according to a phrase structure grammar. Many state-of-the-art constituency parsers are proposed, but they may provide…

Computation and Language · Computer Science 2023-07-04 Adithya Kulkarni , Nasim Sabetpour , Alexey Markin , Oliver Eulenstein , Qi Li

We focus on the construction of a loss function for the bounding box regression. The Intersection over Union (IoU) metric is improved to converge faster, to make the surface of the loss function smooth and continuous over the whole searched…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Petra Števuliáková , Petr Hurtik

In this article, we explore the potential of using sentence-level discourse structure for machine translation evaluation. We first design discourse-aware similarity measures, which use all-subtree kernels to compare discourse parse trees in…

Computation and Language · Computer Science 2017-10-05 Shafiq Joty , Francisco Guzmán , Lluís Màrquez , Preslav Nakov

Dialogue discourse parsing aims to uncover the internal structure of a multi-participant conversation by finding all the discourse~\emph{links} and corresponding~\emph{relations}. Previous work either treats this task as a series of…

Computation and Language · Computer Science 2023-06-28 Ta-Chung Chi , Alexander I. Rudnicky

We address unsupervised discontinuous constituency parsing, where we observe a high variance in the performance of the only previous model in the literature. We propose to build an ensemble of different runs of the existing discontinuous…

Computation and Language · Computer Science 2024-11-07 Behzad Shayegh , Yuqiao Wen , Lili Mou

Intersection over Union (IoU) is the most popular evaluation metric used in the object detection benchmarks. However, there is a gap between optimizing the commonly used distance losses for regressing the parameters of a bounding box and…

Computer Vision and Pattern Recognition · Computer Science 2019-04-16 Hamid Rezatofighi , Nathan Tsoi , JunYoung Gwak , Amir Sadeghian , Ian Reid , Silvio Savarese

We consider the constituent parsing problem which states: given a final state normalized constituent tree automaton (CTA) and a string, compute the set of all constituent trees that are inductively recognized by the CTA and yield the…

Formal Languages and Automata Theory · Computer Science 2023-09-19 Richard Mörbitz

The accuracy of object detectors and trackers is most commonly evaluated by the Intersection over Union (IoU) criterion. To date, most approaches are restricted to axis-aligned or oriented boxes and, as a consequence, many datasets are only…

Computer Vision and Pattern Recognition · Computer Science 2018-07-27 Tobias Bottger , Patrick Follmann , Michael Fauser

Evaluation protocols play key role in the developmental progress of text detection methods. There are strict requirements to ensure that the evaluation methods are fair, objective and reasonable. However, existing metrics exhibit some…

Computer Vision and Pattern Recognition · Computer Science 2019-04-02 Yuliang Liu , Lianwen Jin , Zecheng Xie , Canjie Luo , Shuaitao Zhang , Lele Xie

We present Boundary IoU (Intersection-over-Union), a new segmentation evaluation measure focused on boundary quality. We perform an extensive analysis across different error types and object sizes and show that Boundary IoU is significantly…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 Bowen Cheng , Ross Girshick , Piotr Dollár , Alexander C. Berg , Alexander Kirillov

Segmentation has emerged as a fundamental field of computer vision and natural language processing, which assigns a label to every pixel/feature to extract regions of interest from an image/text. To evaluate the performance of segmentation,…

Machine Learning · Statistics 2023-11-14 Ben Dai , Chunlin Li

We propose a method for unsupervised parsing based on the linguistic notion of a constituency test. One type of constituency test involves modifying the sentence via some transformation (e.g. replacing the span with a pronoun) and then…

Computation and Language · Computer Science 2020-10-08 Steven Cao , Nikita Kitaev , Dan Klein

Existing metrics used to evaluate table structure recognition algorithms have shortcomings with regard to capturing text and empty cells alignment. In this paper, we build on prior work and propose a new metric - TEDS based IOU similarity…

Computer Vision and Pattern Recognition · Computer Science 2022-08-02 Tarun Kumar , Himanshu Sharad Bhatt

Linguists have long held that a key aspect of natural language syntax is the recursive organization of language units into constituent structures, and research has suggested that current state-of-the-art language models lack an inherent…

Computation and Language · Computer Science 2024-11-27 Michael Ginn

Past work on unsupervised parsing is constrained to written form. In this paper, we present the first study on unsupervised spoken constituency parsing given unlabeled spoken sentences and unpaired textual data. The goal is to determine the…

Computation and Language · Computer Science 2023-05-10 Yuan Tseng , Cheng-I Lai , Hung-yi Lee

We propose an efficient neural framework for sentence-level discourse analysis in accordance with Rhetorical Structure Theory (RST). Our framework comprises a discourse segmenter to identify the elementary discourse units (EDU) in a text,…

Computation and Language · Computer Science 2019-06-13 Xiang Lin , Shafiq Joty , Prathyusha Jwalapuram , M Saiful Bari

In recent years, many semantic segmentation methods have been proposed to predict label of pixels in the scene. In general, we measure area prediction errors or boundary prediction errors for comparing methods. However, there is no…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Yeong-Jun Cho

Constituency parsing is a fundamental yet unsolved challenge in natural language processing. In this paper, we examine the potential of recent large language models (LLMs) to address this challenge. We reformat constituency parsing as a…

Computation and Language · Computer Science 2025-09-29 Xuefeng Bai , Jialong Wu , Yulong Chen , Zhongqing Wang , Kehai Chen , Min Zhang , Yue Zhang

We propose a novel constituency parsing model that casts the parsing problem into a series of pointing tasks. Specifically, our model estimates the likelihood of a span being a legitimate tree constituent via the pointing score…

Computation and Language · Computer Science 2020-06-25 Thanh-Tung Nguyen , Xuan-Phi Nguyen , Shafiq Joty , Xiaoli Li

In this work, we propose a novel constituency parsing scheme. The model predicts a vector of real-valued scalars, named syntactic distances, for each split position in the input sentence. The syntactic distances specify the order in which…

Computation and Language · Computer Science 2018-06-13 Yikang Shen , Zhouhan Lin , Athul Paul Jacob , Alessandro Sordoni , Aaron Courville , Yoshua Bengio
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