Active gated imaging for automotive safety applications

Grauer, Yoav; Sonn, Ezri

doi:10.1117/12.2078169

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…Gated imaging: Many applications such as automobile night vision and safety [9,11], surveillance system [22,27,3], long distance identification [1], and mammography [8] use gated imaging for selective range imaging. In gated imaging system, a short pulsed laser light is emitted and a synchronized super high speed shutter in the camera is opened for a brief duration to allow light reflected back only from the range of interest.…”

Section: Related Workmentioning

confidence: 99%

Depth Selective Camera: A Direct, On-Chip, Programmable Technique for Depth Selectivity in Photography

Tadano

Pediredla

Veeraraghavan

2015

2015 IEEE International Conference on Computer Vision (ICCV)

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Time of flight (ToF) cameras use a temporally modulated light source and measure correlation between the reflected light and a sensor modulation pattern, in order to infer scene depth. In this paper, we show that such correlational sensors can also be used to selectively accept or reject light rays from certain scene depths. The basic idea is to carefully select illumination and sensor modulation patterns such that the correlation is non-zero only in the selected depth range -thus light reflected from objects outside this depth range do not affect the correlational measurements. We demonstrate a prototype depth-selective camera and highlight two potential applications: imaging through scattering media and virtual blue screening. This depthselectivity can be used to reject back-scattering and reflection from media in front of the subjects of interest, thereby significantly enhancing the ability to image through scattering media-critical for applications such as car navigation in fog and rain. Similarly, such depth selectivity can also be utilized as a virtual blue-screen in cinematography by rejecting light reflecting from background, while selectively retaining light contributions from the foreground subject.

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Section: Related Workmentioning

confidence: 99%

Depth Selective Camera: A Direct, On-Chip, Programmable Technique for Depth Selectivity in Photography

Tadano

Pediredla

Veeraraghavan

2015

2015 IEEE International Conference on Computer Vision (ICCV)

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“…On the industry side, [113] first apply a NIR range-gated camera to aid driving at night. Grauer et al [114] and [115] present a high resolution (1.2M pixel) range-gated camera based on NIR VCSEL laser (808nm) and a gated CMOS image sensor. This sensor is suitable for use in active safety systems such as vulnerable object detection, forward collision warning, lane departure warning, traffic sign detection, etc.…”

Section: B Applications Of In Adas/admentioning

confidence: 99%

Unconventional Visual Sensors for Autonomous Vehicles

Li¹,

Moreau²,

Ibañez‐Guzmán³

2022

Preprint

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Autonomous vehicles rely on perception systems to understand their surroundings for further navigation missions. Cameras are essential for perception systems due to the advantages of object detection and recognition provided by modern computer vision algorithms, comparing to other sensors, such as LiDARs and radars. However, limited by its inherent imaging principle, a standard RGB camera may perform poorly in a variety of adverse scenarios, including but not limited to: low illumination, high contrast, bad weather such as fog/rain/snow, etc. Meanwhile, estimating the 3D information from the 2D image detection is generally more difficult when compared to LiDARs or radars. Several new sensing technologies have emerged in recent years to address the limitations of conventional RGB cameras. In this paper, we review the principles of four novel image sensors: infrared cameras, range-gated cameras, polarization cameras, and event cameras. Their comparative advantages, existing or potential applications, and corresponding data processing algorithms are all presented in a systematic manner. We expect that this study will assist practitioners in the autonomous driving society with new perspectives and insights.

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“…Time-gated sensors are also used to enhance visibility, for instance by allowing imaging through fog and smoke [Satat et al 2018]. The recent decade saw a proliferation of advanced driver assistance systems (ADAS) to increase automobile safety, with fixed time-gated cameras of gate widths as narrow as 200 ps used to avoid collision and improve night-time navigation [David et al 2006;Grauer and Sonn 2015]). Coupled with machine learning algorithms, time-gated sensors are also used as alternatives to lidar for dense depth sensing [Gruber et al 2019].…”

Section: Related Workmentioning

confidence: 99%

Ellipsoidal path connections for time-gated rendering

2019

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During the last decade, we have been witnessing the continued development of new time-of-flight imaging devices, and their increased use in numerous and varied applications. However, physics-based rendering techniques that can accurately simulate these devices are still lacking: while existing algorithms are adequate for certain tasks, such as simulating transient cameras, they are very inefficient for simulating time-gated cameras because of the large number of wasted path samples. We take steps towards addressing these deficiencies, by introducing a procedure for efficiently sampling paths with a predetermined length, and incorporating it within rendering frameworks tailored towards simulating time-gated imaging. We use our open-source implementation of the above to empirically demonstrate improved rendering performance in a variety of applications, including simulating proximity sensors, imaging through occlusions, depth-selective cameras, transient imaging in dynamic scenes, and non-line-of-sight imaging. CCS Concepts: • Computing methodologies → Ray tracing.

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Active gated imaging for automotive safety applications

Cited by 8 publications

References 9 publications

Depth Selective Camera: A Direct, On-Chip, Programmable Technique for Depth Selectivity in Photography

Depth Selective Camera: A Direct, On-Chip, Programmable Technique for Depth Selectivity in Photography

Unconventional Visual Sensors for Autonomous Vehicles

Ellipsoidal path connections for time-gated rendering

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