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Conventional imaging requires a line of sight to create accurate visual representations of a scene. In certain circumstances, however, obtaining a suitable line of sight may be impractical, dangerous, or even impossible. Non-line-of-sight…

计算机视觉与模式识别 · 计算机科学 2026-01-21 Fadlullah Raji , John Murray-Bruce

We describe a method for 3D human pose estimation from transient images (i.e., a 3D spatio-temporal histogram of photons) acquired by an optical non-line-of-sight (NLOS) imaging system. Our method can perceive 3D human pose by `looking…

计算机视觉与模式识别 · 计算机科学 2020-04-02 Mariko Isogawa , Ye Yuan , Matthew O'Toole , Kris Kitani

There has been an increasing interest in deploying non-line-of-sight (NLOS) imaging systems for recovering objects behind an obstacle. Existing solutions generally pre-calibrate the system before scanning the hidden objects. Onsite…

图像与视频处理 · 电气工程与系统科学 2021-12-30 Zhengqing Pan , Ruiqian Li , Tian Gao , Zi Wang , Ping Liu , Siyuan Shen , Tao Wu , Jingyi Yu , Shiying Li

Non-line-of-sight (NLOS) imaging allows for the imaging of objects around a corner, which enables potential applications in various fields such as autonomous driving, robotic vision, medical imaging, security monitoring, etc. However, the…

图像与视频处理 · 电气工程与系统科学 2023-09-21 Duolan Huang , Quan Chen , Zhun Wei , Rui Chen

Recent works have demonstrated non-line of sight (NLOS) reconstruction by using the time-resolved signal frommultiply scattered light. These works combine ultrafast imaging systems with computation, which back-projects the recorded…

计算机视觉与模式识别 · 计算机科学 2017-06-21 Victor Arellano , Diego Gutierrez , Adrian Jarabo

Reconstructing object geometry from radio frequency (RF) signals is fundamentally challenging due to the lensless imaging nature of RF sensing, which leads to low spatial resolution and high noise. Unlike light signals, RF signals can…

计算机视觉与模式识别 · 计算机科学 2026-05-29 Jiachen Lu , Hailan Shanbhag , Haitham Al Hassanieh

Passive Non-Line-of-Sight (NLOS) imaging requires to reconstruct objects which cannot be seen in line without using external controllable light sources. It can be widely applied in areas like counter-terrorism, urban-Warfare,…

光学 · 物理学 2024-09-02 Yunting Gui , Yuegang Fu , Xueming Xiao , Meibao Yao

Non-line-of-sight (NLOS) imaging with intelligent sensors emerges as a novel technique in imaging and sensing occluded objects around corners. With the innovation of bio-inspired neuromorphic sensors, the applications of novel sensors in…

光学 · 物理学 2024-11-15 Conghe Wang , Xia Wang , Yujie Fang , Changda Yan , Xin Zhang , Yifan Zuo

Sensing in non-line-of-sight (NLOS) is one of the major challenges for integrated sensing and communication systems. Existing countermeasures for NLOS either use prior knowledge on the environment to characterize all the multiple bounces or…

信号处理 · 电气工程与系统科学 2025-11-20 Davide Tornielli Bellini , Dario Tagliaferri , Pietro Grassi , Davide Scazzoli , Stefano Tebaldini , Umberto Spagnolini

Non-line-of-Sight (NLOS) imaging systems collect light at a diffuse relay surface and input this measurement into computational algorithms that output a 3D volumetric reconstruction. These algorithms utilize the Fast Fourier Transform (FFT)…

图像与视频处理 · 电气工程与系统科学 2025-01-14 Talha Sultan , Alex Bocchieri , Chaoying Gu , Xiaochun Liu , Pavel Polynkin , Andreas Velten

The study of non-line-of-sight (NLOS) imaging is growing due to its many potential applications, including rescue operations and pedestrian detection by self-driving cars. However, implementing NLOS imaging on a moving camera remains an…

计算机视觉与模式识别 · 计算机科学 2024-04-09 Shenbagaraj Kannapiran , Sreenithy Chandran , Suren Jayasuriya , Spring Berman

The goal of non-line-of-sight (NLOS) imaging is to image objects occluded from the camera's field of view using multiply scattered light. Recent works have demonstrated the feasibility of two-bounce (2B) NLOS imaging by scanning a laser and…

图像与视频处理 · 电气工程与系统科学 2023-04-05 Siddharth Somasundaram , Akshat Dave , Connor Henley , Ashok Veeraraghavan , Ramesh Raskar

Traditional imaging systems, such as the eye or cameras, image scenes that lie in the direct line-of-sight (LoS). Most objects are opaque in the optical and infrared regimes and can limit dramatically the field of view (FoV). Current…

光学 · 物理学 2022-05-11 Yiran Cui , Georgios C. Trichopoulos

The detection and localization of a source hidden outside the Line-of-Sight (LOS) traditionally rely on the acquisition of indirect signals, such as those reflected from visible relay surfaces such as floors or walls. These reflected…

声音 · 计算机科学 2025-06-11 Tal I. Sommer , Ori Katz

Sensing in non-line-of-sight (NLOS) is a well-known issue that limits the effective range of radar-like sensors. Existing approaches for NLOS sensing consider the usage of either metallic mirrors, that only work under specular reflection,…

信号处理 · 电气工程与系统科学 2024-08-20 Davide Tornielli Bellini , Dario Tagliaferri , Marouan Mizmizi , Stefano Tebaldini , Umberto Spagnolini

The domain of non-line-of-sight (NLOS) imaging is advancing rapidly, offering the capability to reveal occluded scenes that are not directly visible. However, contemporary NLOS systems face several significant challenges: (1) The…

图像与视频处理 · 电气工程与系统科学 2025-02-28 Xiongfei Su , Tianyi Zhu , Lina Liu , Zheng Chen , Yulun Zhang , Siyuan Li , Juntian Ye , Feihu Xu , Xin Yuan

This paper presents a method of passive non-line-of-sight (NLOS) imaging using polarization cues. A key observation is that the oblique light has a different polarimetric signal. It turns out this effect is due to the polarization axis…

图像与视频处理 · 电气工程与系统科学 2019-12-02 Kenichiro Tanaka , Yasuhiro Mukaigawa , Achuta Kadambi

Robust autonomous navigation in environments with limited visibility remains a critical challenge in robotics. We present a novel approach that leverages Non-Line-of-Sight (NLOS) sensing using single-photon LiDAR to improve visibility and…

机器人学 · 计算机科学 2025-03-12 Aaron Young , Nevindu M. Batagoda , Harry Zhang , Akshat Dave , Adithya Pediredla , Dan Negrut , Ramesh Raskar

Vehicles, search and rescue personnel, and endoscopes use flash lights to locate, identify, and view objects in their surroundings. Here we show the first steps of how all these tasks can be done around corners with consumer cameras. Recent…

计算机视觉与模式识别 · 计算机科学 2018-10-30 Matthew Tancik , Guy Satat , Ramesh Raskar

Phasor-field (P-field) imaging is a promising recent solution to the task of non-line-of-sight (NLoS) imaging, colloquially referred to as "seeing around corners". It consists of treating the oscillating envelope of amplitude-modulated,…

光学 · 物理学 2020-07-15 Justin Dove , Jeffrey H. Shapiro