A trillion frames per second: the techniques and applications of light-in-flight photography

Faccio, Daniele; Velten, Andreas

doi:10.1088/1361-6633/aacca1

Cited by 42 publications

(27 citation statements)

References 130 publications

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“…We can broadly distinguish between two types of time-of-flight imaging sensors. First, transient imaging sensors record a sequence of images, with each image comprising contributions from photons that have traveled for a specific time between emission and measurement [Faccio and Velten 2018;. Transient cameras have been implemented using a number of different technologies, with temporal resolutions ranging from a few nanoseconds to a few femtoseconds.…”

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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Section: Related Workmentioning

confidence: 99%

Ellipsoidal path connections for time-gated rendering

2019

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“…Recent advances in photonics offer various innovative approaches for three-dimensional imaging [ 42 ]. Among those is time-of-flight imaging, which enables detection and tracking of objects.…”

Section: Related Workmentioning

confidence: 99%

Action Recognition Using Single-Pixel Time-of-Flight Detection

Ofodile

Helmi

Clapés

et al. 2019

Entropy

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Action recognition is a challenging task that plays an important role in many robotic systems, which highly depend on visual input feeds. However, due to privacy concerns, it is important to find a method which can recognise actions without using visual feed. In this paper, we propose a concept for detecting actions while preserving the test subject’s privacy. Our proposed method relies only on recording the temporal evolution of light pulses scattered back from the scene. Such data trace to record one action contains a sequence of one-dimensional arrays of voltage values acquired by a single-pixel detector at 1 GHz repetition rate. Information about both the distance to the object and its shape are embedded in the traces. We apply machine learning in the form of recurrent neural networks for data analysis and demonstrate successful action recognition. The experimental results show that our proposed method could achieve on average 96.47 % accuracy on the actions walking forward, walking backwards, sitting down, standing up and waving hand, using recurrent neural network.

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“…Currently, ICCDs with their temporal resolution of 200 ps cannot separate the components of biexponential decays [24]. Therefore, there is a constant drive towards the improvement of the temporal capabilities of these cameras [25,26,27,28,29].…”

Section: Introductionmentioning

confidence: 99%

Time-of-Flight Imaging at 10 ps Resolution with an ICCD Camera

Cester

Lyons

Braidotti

et al. 2019

Sensors

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ICCD cameras can record low light events with extreme temporal resolution. Thus, they are used in a variety of bio-medical applications for single photon time of flight measurements and LIDAR measurements. In this paper, we present a method which allows improvement of the temporal resolution of ICCD cameras down to 10 ps (from the native 200 ps of our model), thus placing ICCD cameras at a better temporal resolution than SPAD cameras and in direct competition with streak cameras. The higher temporal resolution can serve for better tracking and visualization of the information carried in time-of-flight measurements.

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A trillion frames per second: the techniques and applications of light-in-flight photography

Cited by 42 publications

References 130 publications

Ellipsoidal path connections for time-gated rendering

Ellipsoidal path connections for time-gated rendering

Action Recognition Using Single-Pixel Time-of-Flight Detection

Time-of-Flight Imaging at 10 ps Resolution with an ICCD Camera

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