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12 results for “high-speed camera”
Dataset for the manuscript: Pixel-wise programmability enables dynamic high-SNR cameras for high-speed microscopy
<p>These are the data files used to generate the figures in the paper: Pixel-wise programmability enables dynamic high-SNR cameras for high-speed microscopy. DOI: 10.1101/2023.06.27.546748</p>
Vallée de la Sionne Snow Avalanche n. 20213009: High-speed camera recording and derived variables
<p>This repository hosts data obtained from high-speed camera measurements conducted within a large powder snow avalanche (No. 20213009) that occurred naturally at the Vallée de la Sionne test site in Switzerland. Positioned 14 meters above the ground on a vertical pylon, the high-speed camera captures visualizations of snow particles within the aerial layers. These images reveal diverse particle clusters, identifiable as bright spots due to their higher light reflectance compared to the surrounding air-snow crystal mixture.</p> <p>Contained within this repository is an overview video recording along with corresponding data on the average brightness of each image captured by the high-speed camera. This dataset facilitates the reconstruction of the temporal evolution and frequency of particle clustering, with brightness intensity acting as a proxy for mass transport. The average brightness for each image is computed from the averaging of values from 2048 x 2048 pixels (greyscale 0 to 255). These datasets complement the findings presented in the following publication:</p> <p>B. Sovilla, E. Marchetti, M. Kyburz, A. Koehler, P. Huguenin, I. Calic, M.J. Kohler, E. Surinach, and C. Pérez-Guillén, under review. "The dominant source mechanism of infrasound generation in powder snow avalanches," submitted to Geophysical Research Letters.</p>
High-Speed Camera Videos of Electrical Arc During Hot Switching Tests
<p>This repository contains high-speed camera videos showing the ignition, evolution, and extinguishing of electrical arcs generated by a single break operation. The videos were acquired to obtain a better understanding of the phenomenon of primary arcing prior to the ignition of the main arc. The electrical arcs were generated by a break operation (hot switching) between two electrodes. The static electrode is a hard-gold coated silver-nickel core rivet. The moving electrode consists of different electrical contact materials. Namely: pure silver and copper electrodes (obtained from high-purity rod material, Ag rod and Cu rod), powder metallurgically sintered silver and copper reference samples (Ag0 and Cu0), as well as carbon nanotube reinforced metal matrix composites (Ag1, Ag2, Ag, Cu1, Cu2, and Cu3, where the number indicates the weight percentage of carbon nanotubes). Well-established reference materials were also recorded, i.e., Ag-Ni 90-10, Ag-SnO2 92-8, Ag-SnO2 90-10, and Ag-SnO2 88-12. The electrical load consisted of four 50 W conventional automotive halogen lamps (direct current).</p>
Speckle image stacks acquired on human skin with a high-speed camera
<p>These datasets all consist of stacks of images of various body parts of of the same 50-year-old Caucasian male subject.</p> <p>For each acquisition, the skin was first illuminated with a near-infrared LASER (wavelength 785 nm). Then, the skin was filmed with a Phantom VEO 710L camera, with an acquisition rate of 2000 to 30,000 Hz.</p> <ul> <li>Datasets <strong>WRIST_1</strong>, <strong>WRIST_2</strong> and <strong>WRIST_3</strong> were acquired by imaging the anterior surface of the left wrist, with respective acquisition frequencies of 3000, 2000 and 10,000 Hz.</li> <li>Dataset <strong>FINGERS</strong> consists of images of the end of two fingers of the left hand. It was acquired at 30,000 Hz.</li> <li>Dataset <strong>EAR</strong> consists of images of the right ear. It was acquired at 2000 Hz.</li> <li>Dataset <strong>PALM</strong> consists of images of the palm of the left hand, which was gently scraped beforehand to trigger a superficial inflammation and draw a smiley face. It was then filmed with an acquisition frequency of 10,000 Hz.</li> </ul> <p>Each dataset is stored in a HDF5 file. The data array is stored as <strong>data </strong>at the root of the tree structure. Attributes <strong>T_exp </strong>and <strong>f_acq</strong> provide respectively the exposure time (in microseconds) and the acquisition rate (in Hertz) of the dataset. The script <strong>test.py </strong>shows how data can be accessed through Python and the library h5py. It can be used as follows:</p> <pre><code class="language-bash">python test.py filename.h5</code></pre> <p>All these datasets are used and referenced in our companion article "Dynamic speckle imaging of human skin vasculature with a high-speed camera" (to be published).</p>
Fracture propagation captured by high-speed camera 2: Video (configuration 4)
<p>The video presents the target plate captured by high-speed camera 2 during testing, and shows the damage for configuration 4. A line can be observed between the first and the third impact and a lighter one between the second and third impact. A deeper analysis of the three enlarged holes highlights the location of crack tips and the crack between the first and the third hole. The line between impact 1 and 3 corresponds, to a full crack formation on the plate. On the contrary, there is only an initiation of crack formation between impacts 2 and 3.</p>
Penetration and perforation process of 12.7mm FSP on plate captured by high-speed camera 2: Video (Test 2 of configuration 2).
<p>The penetration and the perforation process of configuration 2 is recorded using HSC 2. It is shown that at the moment of impact, the FSP causes a localized bulge at the rear side of the plate. A localized shearing of material, induced by the FSP front surface, is created in the contact zone. Immediately after, the FSP penetrates and a circular plug is punched through the plate, leaving a clean cut hole. Subsequently, the punched plug can be seen attached to the front surface of the projectile. After that, the punched plug is separated from the FSP.</p>
"Pitch-angle of FSP before and after ballistic impact on plate captured by high-speed camera 1: Video (configuration 2)".
<p>The figure reveals that the pitch-angle of a 12.7mm FSP both before and after the ballistic impact on an Aluminum plate is low.</p>
1000 fps Swimming behavioral videos (high-speed camera, in dorsal view)
Open the record for dataset details and reuse information.
Data of Sedimentation process of ashfall during a Vulcanian eruption as revealed by high-temporal-resolution grain size analysis and high-speed camera imaging
<p>Data of ash falling rate, grain size analysis of ash deposit, and high-speed camera imaging of airborne ash particles used in "Sedimentation process of ashfall during a Vulcanian eruption as revealed by high-temporal-resolution grain size analysis and high-speed camera imaging". </p>
High-speed camera recordings of unsteady flow in a multistage helico-axial pump
<p>High-speed camera recordings of the unsteady flow in a multistage helico-axial pump. Covers a range of relative flow rates from 133 to 45% of the best efficiency point. A test rig with a transparent pump casing, comprising three low-specific speed compression stages was commissioned in a flow loop which allows a variety of pump inlet conditions with water and nitrogen as process fluids. A small amount of nitrogen was injected at the inlet and used as tracers in the flow. Recordings focus on the second stage of the pump.</p>
Video for the high-speed camera photos from granular flow experiments
<p>These are two video for grains mass movement derived from granular flow laboratory experiments (which generated by high speed camera photos).</p> <p>Additionally, the corresponding raw photos are also presented.</p>
A typical result from the high-speed camera HSC for the flight trajectory of a 7 mm diameter projectile propelled from the explosion of 10 g C4 at the entrance of the explosive driven shock tube
<p>The video shows a typical result from the high-speed camera HSC for the flight trajectory of a 7 mm diameter projectile propelled from the explosion of 10 g C4 at the entrance of the explosive driven shock tube. The video depict the magnitude of the displacement which represents the distortion of the air density due to the passage of the shock wave. The displacement is shown in colors where red represents the highest values. The main features of the flow field around the supersonic freely flying projectile, such as the spherical and the detached shock wave in its front are captured with a good spatial resolution. </p>
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International Brain Laboratory public data
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OpenNeuro
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