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Document representation is the core of many NLP tasks on machine understanding. A general representation learned in an unsupervised manner reserves generality and can be used for various applications. In practice, sentiment analysis (SA)…

Machine Learning · Computer Science 2024-01-15 Hao-Ming Fu , Pu-Jen Cheng

This work addresses image restoration tasks through the lens of inverse problems using unpaired datasets. In contrast to traditional approaches -- which typically assume full knowledge of the forward model or access to paired degraded and…

Computer Vision and Pattern Recognition · Computer Science 2025-06-18 Giacomo Meanti , Thomas Ryckeboer , Michael Arbel , Julien Mairal

Unsupervised learning of cross-lingual word embedding offers elegant matching of words across languages, but has fundamental limitations in translating sentences. In this paper, we propose simple yet effective methods to improve…

Computation and Language · Computer Science 2019-01-08 Yunsu Kim , Jiahui Geng , Hermann Ney

We present a novel unsupervised learning approach to image landmark discovery by incorporating the inter-subject landmark consistencies on facial images. This is achieved via an inter-subject mapping module that transforms original subject…

Computer Vision and Pattern Recognition · Computer Science 2020-07-09 Weijian Li , Haofu Liao , Shun Miao , Le Lu , Jiebo Luo

Semantic segmentation is a critical step in automated image interpretation and analysis where pixels are classified into one or more predefined semantically meaningful classes. Deep learning approaches for semantic segmentation rely on…

Computer Vision and Pattern Recognition · Computer Science 2023-07-10 Tushar Kataria , Beatrice Knudsen , Shireen Elhabian

Matching two texts is a fundamental problem in many natural language processing tasks. An effective way is to extract meaningful matching patterns from words, phrases, and sentences to produce the matching score. Inspired by the success of…

Computation and Language · Computer Science 2016-02-23 Liang Pang , Yanyan Lan , Jiafeng Guo , Jun Xu , Shengxian Wan , Xueqi Cheng

We present a contrasting learning approach with data augmentation techniques to learn document representations in an unsupervised manner. Inspired by recent contrastive self-supervised learning algorithms used for image and NLP pretraining,…

Computation and Language · Computer Science 2021-03-29 Dongsheng Luo , Wei Cheng , Jingchao Ni , Wenchao Yu , Xuchao Zhang , Bo Zong , Yanchi Liu , Zhengzhang Chen , Dongjin Song , Haifeng Chen , Xiang Zhang

We introduce DocSCAN, a completely unsupervised text classification approach using Semantic Clustering by Adopting Nearest-Neighbors (SCAN). For each document, we obtain semantically informative vectors from a large pre-trained language…

Computation and Language · Computer Science 2022-10-05 Dominik Stammbach , Elliott Ash

Graph-based semi-supervised learning has proven to be an effective approach for query-focused multi-document summarization. The problem of previous semi-supervised learning is that sentences are ranked without considering the higher level…

Computation and Language · Computer Science 2014-01-03 Jiwei Li , Sujian Li

Domain adaptation is one of the prominent strategies for handling both domain shift, that is widely encountered in large-scale land use/land cover map calculation, and the scarcity of pixel-level ground truth that is crucial for supervised…

Computer Vision and Pattern Recognition · Computer Science 2023-08-09 Sarmad F. Ismael , Koray Kayabol , Erchan Aptoula

Most of current image captioning models heavily rely on paired image-caption datasets. However, getting large scale image-caption paired data is labor-intensive and time-consuming. In this paper, we present a scene graph-based approach for…

Computer Vision and Pattern Recognition · Computer Science 2019-08-20 Jiuxiang Gu , Shafiq Joty , Jianfei Cai , Handong Zhao , Xu Yang , Gang Wang

In this paper, we focus on a new practical task, document-scale text content manipulation, which is the opposite of text style transfer and aims to preserve text styles while altering the content. In detail, the input is a set of structured…

Computation and Language · Computer Science 2020-02-25 Xiaocheng Feng , Yawei Sun , Bing Qin , Heng Gong , Yibo Sun , Wei Bi , Xiaojiang Liu , Ting Liu

Abstractive text summarization aims at compressing the information of a long source document into a rephrased, condensed summary. Despite advances in modeling techniques, abstractive summarization models still suffer from several key…

Computation and Language · Computer Science 2021-02-17 Vidhisha Balachandran , Artidoro Pagnoni , Jay Yoon Lee , Dheeraj Rajagopal , Jaime Carbonell , Yulia Tsvetkov

Unsupervised sentence representation learning is one of the fundamental problems in natural language processing with various downstream applications. Recently, contrastive learning has been widely adopted which derives high-quality sentence…

Computation and Language · Computer Science 2023-05-29 Jiduan Liu , Jiahao Liu , Qifan Wang , Jingang Wang , Wei Wu , Yunsen Xian , Dongyan Zhao , Kai Chen , Rui Yan

Recent literature shows that large-scale language modeling provides excellent reusable sentence representations with both recurrent and self-attentive architectures. However, there has been less clarity on the commonalities and differences…

Computation and Language · Computer Science 2019-08-30 Jindřich Libovický , Pranava Madhyastha

Self-supervised learning is a machine learning approach that generates implicit labels by learning underlined patterns and extracting discriminative features from unlabeled data without manual labelling. Contrastive learning introduces the…

Computer Vision and Pattern Recognition · Computer Science 2025-10-13 Asifullah Khan , Laiba Asmatullah , Anza Malik , Shahzaib Khan , Hamna Asif

Contrastive learning has been attracting much attention for learning unsupervised sentence embeddings. The current state-of-the-art unsupervised method is the unsupervised SimCSE (unsup-SimCSE). Unsup-SimCSE takes dropout as a minimal data…

Computation and Language · Computer Science 2022-09-13 Xing Wu , Chaochen Gao , Liangjun Zang , Jizhong Han , Zhongyuan Wang , Songlin Hu

Unsupervised image-to-image translation methods aim to map images from one domain into plausible examples from another domain while preserving structures shared across two domains. In the many-to-many setting, an additional guidance example…

Computer Vision and Pattern Recognition · Computer Science 2021-11-29 Ben Usman , Dina Bashkirova , Kate Saenko

Text-image cross-modal retrieval is a challenging task in the field of language and vision. Most previous approaches independently embed images and sentences into a joint embedding space and compare their similarities. However, previous…

Computer Vision and Pattern Recognition · Computer Science 2019-09-13 Zihao Wang , Xihui Liu , Hongsheng Li , Lu Sheng , Junjie Yan , Xiaogang Wang , Jing Shao

A variety of contextualised language models have been proposed in the NLP community, which are trained on diverse corpora to produce numerous Neural Language Models (NLMs). However, different NLMs have reported different levels of…

Computation and Language · Computer Science 2022-04-19 Keigo Takahashi , Danushka Bollegala