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In this paper, we address the limitations of traditional constant false alarm rate (CFAR) target detectors in automotive radars, particularly in complex urban environments with multiple objects that appear as extended targets. We propose a…

信号处理 · 电气工程与系统科学 2024-06-18 Ignacio Roldan , Andras Palffy , Julian F. P. Kooij , Dariu M. Gavrila , Francesco Fioranelli , Alexander Yarovoy

Change detection from synthetic aperture radar (SAR) imagery is a critical yet challenging task. Existing methods mainly focus on feature extraction in spatial domain, and little attention has been paid to frequency domain. Furthermore, in…

计算机视觉与模式识别 · 计算机科学 2022-02-16 Xiaofan Qu , Feng Gao , Junyu Dong , Qian Du , Heng-Chao Li

We consider the problem of synthetic aperture radar (SAR) imaging and motion estimation of complex scenes. By complex we mean scenes with multiple targets, stationary and in motion. We use the usual setup with one moving antenna emitting…

信息论 · 计算机科学 2015-03-20 Liliana Borcea , Thomas Callaghan , George Papanicolaou

Matting with a static background, often referred to as ``Background Matting" (BGM), has garnered significant attention within the computer vision community due to its pivotal role in various practical applications like webcasting and photo…

计算机视觉与模式识别 · 计算机科学 2024-02-27 Hanxi Li , Guofeng Li , Bo Li , Lin Wu , Yan Cheng

Scene background initialization allows the recovery of a clear image without foreground objects from a video sequence, which is generally the first step in many computer vision and video processing applications. The process may be strongly…

计算机视觉与模式识别 · 计算机科学 2018-05-18 Zhe Xu , Biao Min , Ray C. C. Cheung

A user-centric method for fast, interactive, robust and high-quality shadow removal is presented. Our algorithm can perform detection and removal in a range of difficult cases: such as highly textured and colored shadows. To perform…

计算机视觉与模式识别 · 计算机科学 2016-09-21 Han Gong , Darren P. Cosker

Infrared dim and small target detection presents a significant challenge due to dynamic multi-frame scenarios and weak target signatures in the infrared modality. Traditional low-rank plus sparse models often fail to capture dynamic…

计算机视觉与模式识别 · 计算机科学 2025-10-14 Pei Liu , Yisi Luo , Wenzhen Wang , Xiangyong Cao

Hashing has been widely used in approximate nearest search for large-scale database retrieval for its computation and storage efficiency. Deep hashing, which devises convolutional neural network architecture to exploit and extract the…

计算机视觉与模式识别 · 计算机科学 2020-06-11 Xiaopeng Zhang

Deep learning approaches require enough training samples to perform well, but it is a challenge to collect enough real training data and label them manually. In this letter, we propose the use of realistic synthetic data with a wide…

计算机视觉与模式识别 · 计算机科学 2020-06-11 Weixing Liu , Jun Liu , Bin Luo

Change detection is one of the fundamental applications of synthetic aperture radar (SAR) images. However, speckle noise presented in SAR images has a much negative effect on change detection. In this research, a novel two-phase…

计算机视觉与模式识别 · 计算机科学 2020-01-20 Xinzheng Zhang , Guo Liu , Ce Zhang , Peter M Atkinson , Xiaoheng Tan , Xin Jian , Xichuan Zhou , Yongming Li

One of the primary challenges in Synthetic Aperture Radar (SAR) object detection lies in the pervasive influence of coherent noise. As a common practice, most existing methods, whether handcrafted approaches or deep learning-based methods,…

计算机视觉与模式识别 · 计算机科学 2025-08-14 Kang Ni , Minrui Zou , Yuxuan Li , Xiang Li , Kehua Guo , Ming-Ming Cheng , Yimian Dai

Interferometric Synthetic Aperture Radar (InSAR) Imaging methods are usually based on algorithms of match-filtering type, without considering the scene's characteristic, which causes limited imaging quality. Besides, post-processing steps…

信号处理 · 电气工程与系统科学 2022-10-07 Xu Zhan , Xiaoling Zhang , Shunjun Wei , Jun Shi

This paper introduces a single-channel SAR algorithm designed to detect and produce high-fidelity images of moving targets in spotlight mode. The proposed fast backprojection algorithm utilizes multi-level interpolations and aggregation of…

信号处理 · 电气工程与系统科学 2025-01-31 Raz Rajwan , Amir Boag

Radar (SAR) images often exhibit profound appearance variations due to a variety of factors including clutter noise produced by the coherent nature of the illumination. Ultrasound images and infrared images have similar cluttered…

计算机视觉与模式识别 · 计算机科学 2013-04-30 Ana Georgina Flesia , Javier Gimenez , Elena Rufeil Fiori

Detecting humans from airborne visual and thermal imagery is a fundamental challenge for Wilderness Search-and-Rescue (WiSAR) teams, who must perform this function accurately in the face of immense pressure. The ability to fuse these two…

计算机视觉与模式识别 · 计算机科学 2023-09-26 Aadhar Chauhan , Isaac Remy , Danny Broyles , Karen Leung

Object detection in aerial images is an important task in environmental, economic, and infrastructure-related tasks. One of the most prominent applications is the detection of vehicles, for which deep learning approaches are increasingly…

计算机视觉与模式识别 · 计算机科学 2021-04-08 Immanuel Weber , Jens Bongartz , Ribana Roscher

DeepFake is becoming a real risk to society and brings potential threats to both individual privacy and political security due to the DeepFaked multimedia are realistic and convincing. However, the popular DeepFake passive detection is an…

密码学与安全 · 计算机科学 2022-06-02 Run Wang , Ziheng Huang , Zhikai Chen , Li Liu , Jing Chen , Lina Wang

Obstacle Detection is a central problem for any robotic system, and critical for autonomous systems that travel at high speeds in unpredictable environment. This is often achieved through scene depth estimation, by various means. When fast…

机器人学 · 计算机科学 2016-07-22 Michele Mancini , Gabriele Costante , Paolo Valigi , Thomas A. Ciarfuglia

Modern radar systems are designed to have high Doppler tolerance to detect fast-moving targets. This means range and Doppler estimations are inevitably coupled, opening pathways to concealing objects by imprinting artificial Doppler…

信号处理 · 电气工程与系统科学 2023-05-17 V. Kozlov , D. Vovchuk , P. Ginzburg

Estimating the depth of objects from a single image is a valuable task for many vision, robotics, and graphics applications. However, current methods often fail to produce accurate depth for objects in diverse scenes. In this work, we…

计算机视觉与模式识别 · 计算机科学 2023-06-09 Manel Baradad , Yuanzhen Li , Forrester Cole , Michael Rubinstein , Antonio Torralba , William T. Freeman , Varun Jampani