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We attack the problem of learning concepts automatically from noisy web image search results. Going beyond low level attributes, such as colour and texture, we explore weakly-labelled datasets for the learning of higher level concepts, such…

计算机视觉与模式识别 · 计算机科学 2013-12-17 Eren Golge , Pinar Duygulu

In ultra-fast astronomical observations featuring fast transients on sub-$\mu$s time scales, the conventional Signal-to-Noise Ratio (SNR) threshold, often fixed at $5\sigma$, becomes inadequate as observational window timescales shorten,…

天体物理仪器与方法 · 物理学 2025-06-24 Albert Wai Kit Lau , Leo W. H. Fung , George F. Smoot

Fourier ptychographic microscopy (FPM) is a recently proposed computational imaging technique with both high resolution and wide field-of-view. In current FP experimental setup, the dark-field images with high-angle illuminations are easily…

计算机视觉与模式识别 · 计算机科学 2017-12-19 Yan Zhang , An Pan , Ming Lei , Baoli Yao

We present an approach to depth estimation that fuses information from a stereo pair with sparse range measurements derived from a LIDAR sensor or a range camera. The goal of this work is to exploit the complementary strengths of the two…

计算机视觉与模式识别 · 计算机科学 2018-09-21 Shreyas S. Shivakumar , Kartik Mohta , Bernd Pfrommer , Vijay Kumar , Camillo J. Taylor

We propose a non-intrusive Deep Learning-based Reduced Order Model (DL-ROM) capable of capturing the complex dynamics of mechanical systems showing inertia and geometric nonlinearities. In the first phase, a limited number of high fidelity…

数值分析 · 数学 2021-11-25 Stefania Fresca , Giorgio Gobat , Patrick Fedeli , Attilio Frangi , Andrea Manzoni

Sonar-based indoor mapping systems have been widely employed in robotics for several decades. While such systems are still the mainstream in underwater and pipe inspection settings, the vulnerability to noise reduced, over time, their…

机器人学 · 计算机科学 2024-09-19 Usama Saqib , Letizia Marchegiani , Jesper Rindom Jensen

It has been shown that the majority of existing adversarial defense methods achieve robustness at the cost of sacrificing prediction accuracy. The undesirable severe drop in accuracy adversely affects the reliability of machine learning…

密码学与安全 · 计算机科学 2020-11-05 Jiawei Du , Hanshu Yan , Vincent Y. F. Tan , Joey Tianyi Zhou , Rick Siow Mong Goh , Jiashi Feng

This work investigates projection-based Reduced-Order Models (ROMs) formulated in the frequency domain, employing a space-time basis constructed with Spectral Proper Orthogonal Decomposition to efficiently represent dominant spatio-temporal…

流体动力学 · 物理学 2026-01-12 Xiaodong Li , Davide Lasagna

Differential privacy is a promising privacy-preserving paradigm for statistical query processing over sensitive data. It works by injecting random noise into each query result, such that it is provably hard for the adversary to infer the…

数据库 · 计算机科学 2012-12-12 Ganzhao Yuan , Zhenjie Zhang , Marianne Winslett , Xiaokui Xiao , Yin Yang , Zhifeng Hao

We consider the problem of dense depth prediction from a sparse set of depth measurements and a single RGB image. Since depth estimation from monocular images alone is inherently ambiguous and unreliable, to attain a higher level of…

机器人学 · 计算机科学 2018-02-27 Fangchang Ma , Sertac Karaman

The incorporation of LiDAR technology into some high-end smartphones has unlocked numerous possibilities across various applications, including photography, image restoration, augmented reality, and more. In this paper, we introduce a novel…

图像与视频处理 · 电气工程与系统科学 2024-06-28 Alessandro Gnutti , Stefano Della Fiore , Mattia Savardi , Yi-Hsin Chen , Riccardo Leonardi , Wen-Hsiao Peng

Simultaneously odometry and mapping using LiDAR data is an important task for mobile systems to achieve full autonomy in large-scale environments. However, most existing LiDAR-based methods prioritize tracking quality over reconstruction…

计算机视觉与模式识别 · 计算机科学 2023-03-21 Junyuan Deng , Xieyuanli Chen , Songpengcheng Xia , Zhen Sun , Guoqing Liu , Wenxian Yu , Ling Pei

Model order reduction (MOR) methods that are designed to preserve structural features of a given full order model (FOM) often suffer from a lower accuracy when compared to their non-structure-preserving counterparts. In this paper, we…

系统与控制 · 电气工程与系统科学 2022-05-17 Paul Schwerdtner , Matthias Voigt

LiDAR odometry can achieve accurate vehicle pose estimation for short driving range or in small-scale environments, but for long driving range or in large-scale environments, the accuracy deteriorates as a result of cumulative estimation…

机器人学 · 计算机科学 2023-03-16 Lizhou Liao , Chunyun Fu , Binbin Feng , Tian Su

3D Lidar imaging can be a challenging modality when using multiple wavelengths, or when imaging in high noise environments (e.g., imaging through obscurants). This paper presents a hierarchical Bayesian algorithm for the robust…

图像与视频处理 · 电气工程与系统科学 2021-03-19 Abderrahim Halimi , Aurora Maccarone , Robert Lamb , Gerald S. Buller , Stephen McLaughlin

For effective autonomous navigation,estimation of the pose of the robot is essential at every sampling time. For computing an accurate estimation,odometric error needs to be reduced with the help of data from external sensor. In this work,…

计算机视觉与模式识别 · 计算机科学 2012-12-07 Debajyoti Banerji , Ranjit Ray , Jhankar Basu , Indrajit Basak

The Lippmann--Schwinger--Lanczos (LSL) algorithm has recently been shown to provide an efficient tool for imaging and direct inversion of synthetic aperture radar data in multi-scattering environments [17], where the data set is limited to…

数值分析 · 数学 2024-07-10 V. Druskin , S. Moskow , M. Zaslavsky

Traditional reduced order modeling techniques such as the reduced basis (RB) method (relying, e.g., on proper orthogonal decomposition (POD)) suffer from severe limitations when dealing with nonlinear time-dependent parametrized PDEs,…

数值分析 · 数学 2020-01-14 Stefania Fresca , Luca Dede , Andrea Manzoni

We propose an adaptive approach for non local means (NLM) image filtering termed as non local adaptive clipped means (NLACM), which reduces the effect of outliers and improves the denoising quality as compared to traditional NLM. Common…

计算机视觉与模式识别 · 计算机科学 2014-12-10 Raka Kundu , Amlan Chakrabarti , Prasanna Lenka

In this paper, an experimental analysis of the phase noise in an OFDM ARoF setup at 25 GHzfor beyond 5G is presented. The configuration of the setup allows to gradually scale the final phase noise level of the system. Moreover, an OFDM…

信号处理 · 电气工程与系统科学 2021-09-16 Javier Pérez Santacruz , Simon Rommel , Antonio Jurado Navas , Ulf Johannsen , Idelfonso Tafur Monroy