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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

Accurate semantic segmentation models typically require significant computational resources, inhibiting their use in practical applications. Recent works rely on well-crafted lightweight models to achieve fast inference. However, these…

Computer Vision and Pattern Recognition · Computer Science 2023-02-20 Danna Xue , Fei Yang , Pei Wang , Luis Herranz , Jinqiu Sun , Yu Zhu , Yanning Zhang

Subspace clustering refers to the problem of segmenting high dimensional data drawn from a union of subspaces into the respective subspaces. In some applications, partial side-information to indicate "must-link" or "cannot-link" in…

Computer Vision and Pattern Recognition · Computer Science 2018-05-23 Chun-Guang Li , Junjian Zhang , Jun Guo

3D weakly supervised semantic segmentation (3D WSSS) aims to achieve semantic segmentation by leveraging sparse or low-cost annotated data, significantly reducing reliance on dense point-wise annotations. Previous works mainly employ class…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Xiaoxu Xu , Xuexun Liu , Jinlong Li , Yitian Yuan , Qiudan Zhang , Lin Ma , Nicu Sebe , Xu Wang

While supervised deep learning has achieved great success in a range of applications, relatively little work has studied the discovery of knowledge from unlabeled data. In this paper, we propose an unsupervised deep learning framework to…

Computer Vision and Pattern Recognition · Computer Science 2020-09-14 Jinghua Wang , Jianmin Jiang

For unsupervised data-dependent hashing, the two most important requirements are to preserve similarity in the low-dimensional feature space and to minimize the binary quantization loss. A well-established hashing approach is Iterative…

Computer Vision and Pattern Recognition · Computer Science 2019-11-14 Tuan Hoang , Thanh-Toan Do , Huu Le , Dang-Khoa Le-Tan , Ngai-Man Cheung

Semi-supervised learning (SSL) has emerged as a promising paradigm for breast ultrasound (BUS) image segmentation, but it often suffers from unstable pseudo labels under extremely limited annotations, leading to inaccurate supervision and…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Ruili Li , Jiayi Ding , Ruiyu Li , Yilun Jin , Shiwen Ge , Yuwen Zeng , Xiaoyong Zhang , Eichi Takaya , Jan Vrba , Noriyasu Homma

Product Quantization, a dictionary based hashing method, is one of the leading unsupervised hashing techniques. While it ignores the labels, it harnesses the features to construct look up tables that can approximate the feature space. In…

Computer Vision and Pattern Recognition · Computer Science 2020-01-22 Benjamin Klein , Lior Wolf

Dictionary learning and sparse coding have been widely studied as mechanisms for unsupervised feature learning. Unsupervised learning could bring enormous benefit to the processing of hyperspectral images and to other remote sensing data…

Image and Video Processing · Electrical Eng. & Systems 2022-02-03 Joshua Bruton , Hairong Wang

Despite the remarkable performance of supervised medical image segmentation models, relying on a large amount of labeled data is impractical in real-world situations. Semi-supervised learning approaches aim to alleviate this challenge using…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Yunyao Lu , Yihang Wu , Ahmad Chaddad , Tareef Daqqaq , Reem Kateb

We employ unsupervised machine learning to enhance the accuracy of our recently presented scaling method for wave confinement analysis [1]. We employ the standard k-means++ algorithm as well as our own model-based algorithm. We investigate…

Semantic segmentation and instance level segmentation made substantial progress in recent years due to the emergence of deep neural networks (DNNs). A number of deep architectures with Convolution Neural Networks (CNNs) were proposed that…

Computer Vision and Pattern Recognition · Computer Science 2019-09-18 Pulak Purkait , Christopher Zach , Ian Reid

Leveraging quantum properties to enhance complex learning tasks has been proven feasible, with excellent recent achievements in the field of unsupervised learning. However, current quantum schemes neglect adaptive adjustments for…

Quantum Physics · Physics 2024-08-23 Lian-Hui Yu , Xiao-Yu Li , Geng Chen , Qin-Sheng Zhu , Hui Li , Guo-Wu Yang

In this paper, we conduct a holistic exploration of the Universal Decompositional Semantic (UDS) Parsing. We first introduce a cascade model for UDS parsing that decomposes the complex parsing task into semantically appropriate subtasks.…

Computation and Language · Computer Science 2023-07-26 Hexuan Deng , Xin Zhang , Meishan Zhang , Xuebo Liu , Min Zhang

Semantic segmentation requires dense pixel-level annotations, which are costly and time-consuming to acquire. To address this, we present SeSAM, a framework that uses a foundational segmentation model, i.e. Segment Anything Model (SAM),…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Anurag Das , Anna Kukleva , Xinting Hu , Yuki M. Asano , Bernt Schiele

In this paper, we investigated a speech augmentation based unsupervised learning approach for keyword spotting (KWS) task. KWS is a useful speech application, yet also heavily depends on the labeled data. We designed a CNN-Attention…

Sound · Computer Science 2022-05-31 Jian Luo , Jianzong Wang , Ning Cheng , Haobin Tang , Jing Xiao

Supervised deep learning-based hash and vector quantization are enabling fast and large-scale image retrieval systems. By fully exploiting label annotations, they are achieving outstanding retrieval performances compared to the conventional…

Computer Vision and Pattern Recognition · Computer Science 2022-01-13 Young Kyun Jang , Nam Ik Cho

The Segment Anything Model (SAM) exhibits a capability to segment a wide array of objects in natural images, serving as a versatile perceptual tool for various downstream image segmentation tasks. In contrast, medical image segmentation…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 Yizhe Zhang , Tao Zhou , Shuo Wang , Ye Wu , Pengfei Gu , Danny Z. Chen

Unsupervised image segmentation is a critical task in computer vision. It enables dense scene understanding without human annotations, which is especially valuable in domains where labelled data is scarce. However, existing methods often…

Computer Vision and Pattern Recognition · Computer Science 2026-02-16 Boujemaa Guermazi , Riadh Ksantini , Naimul Khan

Clustering is an unsupervised machine learning methodology where unlabeled elements/objects are grouped together aiming to the construction of well-established clusters that their elements are classified according to their similarity. The…

Machine Learning · Statistics 2023-10-20 Dimitrios Saligkaras , Vasileios E. Papageorgiou
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