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The substantial modality-induced variations in radiometric, texture, and structural characteristics pose significant challenges for the accurate registration of multimodal images. While supervised deep learning methods have demonstrated…

Image and Video Processing · Electrical Eng. & Systems 2025-05-29 Xiaochen Wei , Weiwei Guo , Wenxian Yu

Recently there is a line of research work proposing to employ Spectral Clustering (SC) to segment (group){Throughout the paper, we use segmentation, clustering, and grouping, and their verb forms, interchangeably.} high-dimensional…

Computer Vision and Pattern Recognition · Computer Science 2010-10-11 Yuzhao Ni , Ju Sun , Xiaotong Yuan , Shuicheng Yan , Loong-Fah Cheong

Recent vision-language models (VLMs) face significant challenges in test-time adaptation to novel domains. While cache-based methods show promise by leveraging historical information, they struggle with both caching unreliable feature-label…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Fanding Huang , Jingyan Jiang , Qinting Jiang , Hebei Li , Faisal Nadeem Khan , Zhi Wang

We introduce SPARse Fine-grained Contrastive Alignment (SPARC), a simple method for pretraining more fine-grained multimodal representations from image-text pairs. Given that multiple image patches often correspond to single words, we…

Accurate click-through rate (CTR) prediction is vital for online advertising and recommendation systems. Recent deep learning advancements have improved the ability to capture feature interactions and understand user interests. However,…

Information Retrieval · Computer Science 2025-02-24 Kefan Wang , Hao Wang , Kenan Song , Wei Guo , Kai Cheng , Zhi Li , Yong Liu , Defu Lian , Enhong Chen

Subspace clustering refers to the problem of clustering high-dimensional data into a union of low-dimensional subspaces. Current subspace clustering approaches are usually based on a two-stage framework. In the first stage, an affinity…

Machine Learning · Computer Science 2019-10-22 Shuai Yang , Wenqi Zhu , Yuesheng Zhu

This paper introduces a reconfigurable intelligent surface (RIS) to support parameter estimation in machine-type communications (MTC). We focus on a network where single-antenna sensors transmit spatially correlated measurements to a…

Signal Processing · Electrical Eng. & Systems 2026-01-28 Sergi Liesegang , Antonio Pascual-Iserte , Olga Muñoz

Subspace clustering (SC) is a popular method for dimensionality reduction of high-dimensional data, where it generalizes Principal Component Analysis (PCA). Recently, several methods have been proposed to enhance the robustness of PCA and…

Data Structures and Algorithms · Computer Science 2015-06-09 Sanghyuk Chun , Yung-Kyun Noh , Jinwoo Shin

The latent representation in learned image compression encompasses channel-wise, local spatial, and global spatial correlations, which are essential for the entropy model to capture for conditional entropy minimization. Efficiently…

Image and Video Processing · Electrical Eng. & Systems 2025-10-29 Wei Jiang , Jiayu Yang , Yongqi Zhai , Feng Gao , Ronggang Wang

The ongoing convergence of spectrum and hardware requirements for wireless sensing and communication applications has fueled the integrated sensing and communication (ISAC) paradigm in next-generation networks. Neural-network-based ISAC…

Signal Processing · Electrical Eng. & Systems 2025-09-26 Ziyi Wang , Frederik Zumegen , Christoph Studer

Learning generalizable self-supervised graph representations for downstream tasks is challenging. To this end, Contrastive Learning (CL) has emerged as a leading approach. The embeddings of CL are arranged on a hypersphere where similarity…

Machine Learning · Computer Science 2025-02-25 Yifei Zhang , Hao Zhu , Menglin Yang , Jiahong Liu , Rex Ying , Irwin King , Piotr Koniusz

A fundamental challenge in artificial intelligence is learning useful representations of data that yield good performance on a downstream task, without overfitting to spurious input features. Extracting such task-relevant predictive…

Machine Learning · Computer Science 2021-06-15 Saeid Asgari Taghanaki , Kristy Choi , Amir Khasahmadi , Anirudh Goyal

Promising results have been achieved in image classification problems by exploiting the discriminative power of sparse representations for classification (SRC). Recently, it has been shown that the use of \emph{class-specific}…

Computer Vision and Pattern Recognition · Computer Science 2015-02-02 Hojjat Seyed Mousavi , Umamahesh Srinivas , Vishal Monga , Yuanming Suo , Minh Dao , Trac. D. Tran

Spatial multiplexing plays a significant role in improving the capacity of multiple-input multiple-output (MIMO) communication systems. To improve the spectral efficiency (SE) of a point-to-point MIMO system, we exploit the channel…

Information Theory · Computer Science 2024-10-08 Yuxuan Chen , Qingqing Wu , Guangji Chen , Wen Chen

In unsupervised domain adaptation (UDA), a model trained on source data (e.g. synthetic) is adapted to target data (e.g. real-world) without access to target annotation. Most previous UDA methods struggle with classes that have a similar…

Computer Vision and Pattern Recognition · Computer Science 2023-03-27 Lukas Hoyer , Dengxin Dai , Haoran Wang , Luc Van Gool

Reconfigurable Intelligent Surfaces (RIS) are an emerging technology that can be used to reconfigure the propagation environment to improve cellular communication link rates. RIS, which are thin metasurfaces composed of discrete elements,…

Signal Processing · Electrical Eng. & Systems 2020-11-11 Pooja Nuti , Brian L. Evans

Noise robustness in keyword spotting remains a challenge as many models fail to overcome the heavy influence of noises, causing the deterioration of the quality of feature embeddings. We proposed a contrastive regularization method called…

Sound · Computer Science 2022-09-15 Dianwen Ng , Jia Qi Yip , Tanmay Surana , Zhao Yang , Chong Zhang , Yukun Ma , Chongjia Ni , Eng Siong Chng , Bin Ma

Subspace clustering is a powerful unsupervised approach for hyperspectral image (HSI) analysis, but its high computational and memory costs limit scalability. Superpixel segmentation can improve efficiency by reducing the number of data…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Xianlu Li , Nicolas Nadisic , Shaoguang Huang , Aleksandra Pizurica

Multi-label classification (MLC) studies the problem where each instance is associated with multiple relevant labels, which leads to the exponential growth of output space. MLC encourages a popular framework named label compression (LC) for…

Machine Learning · Computer Science 2020-09-21 Jiaqi Lv , Tianran Wu , Chenglun Peng , Yunpeng Liu , Ning Xu , Xin Geng

Graph convolutional networks (GCNs) allow us to learn topologically-aware node embeddings, which can be useful for classification or link prediction. However, they are unable to capture long-range dependencies between nodes without adding…

Machine Learning · Computer Science 2023-08-17 Reza Namazi , Elahe Ghalebi , Sinead Williamson , Hamidreza Mahyar