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1. Verifying the tangential and normal restitution coefficients for double-sphere particles

Author:
Zhang, Shen; Gui, Nan; Huang, Xiaoli; Ge, Liang; Yang, XingTuan; Tu, Jiyuan; Jiang, Shengyao
Source:
Powder technology 2020 v.363 pp. 419-427
ISSN:
0032-5910
Subject:
cameras,   etc   ; measurement; models; particles;     Show all 4 Subjects
Abstract:
... The collision between a single-sphere and a double-sphere is measured in this study by a high speed camera to verify the fundamental issue of tangential and normal restitution coefficients for a particular shape of double-sphere. In this experiment, a single-sphere moves and collides on a stationary double-sphere, and a high speed camera is used to capture the collision of them. Numerous tests wer ...
DOI:
10.1016/j.powtec.2020.01.025

2. How to Specify an Electro-optical Earth Observation Camera? A Review of the Terminologies Used and its Interpretation

Author:
Joseph, George
Source:
Journal of the Indian Society of Remote Sensing 2020 v.48 no.2 pp. 171-180
ISSN:
0255-660X
Subject:
cameras,   etc   ; remote sensing; satellites;     Show all 3 Subjects
Abstract:
... Since the launch of Landsat-1 in 1972, several earth observation satellites have been launched by government and private agencies. To select the optimum data for a specific application and for combining data from different sources require good clarity and understanding of various specifications provided by the sensor manufacturers. Many of the sensor parameters are not unambiguously defined in the ...
DOI:
10.1007/s12524-020-01105-8

3. Exploring new grounds: arboreal sugar gliders frequently observed spending time on the ground as seen on camera traps

Author:
Gracanin, Ana; Cappelletti, Cara; Knipler, Monica; Dallas, Ryan K. K.; Mikac, Katarina M.
Source:
Australian mammalogy 2020 v.42 no.1 pp. 110-113
ISSN:
0310-0049
Subject:
cameras,   etc   ; Petaurus breviceps; foraging;     Show all 3 Subjects
Abstract:
... We provide the first quantitative evidence of sugar gliders (Petaurus breviceps) being detected by ground-based camera traps. We speculate that this may represent occasional movement or foraging on the ground, which has not been fully appreciated previously. ...
DOI:
10.1071/AM19020

4. Particle volume flow rate measurement by combination of dual electrical capacitance tomography sensor and plug flow shape model

Author:
Maung, Chit Oo; Kawashima, Daisuke; Oshima, Hiroyuki; Tanaka, Yuhi; Yamane, Yoshiyuki; Takei, Masahiro
Source:
Powder technology 2020 v.364 pp. 310-320
ISSN:
0032-5910
Subject:
cameras,   etc   ; capacitance; models; powders; tomography;     Show all 5 Subjects
Abstract:
... Particle volume flow rate QPLUG· in plug flow through a cross section of horizontal pipe has been accurately measured by a combination of dual electrical capacitance tomography sensor and plug flow shape model (dECT-PFSM). The plug flow shape model divides the trapezoidal shape of the plug flow into three flow regions which are Tip, Filling, and Tail regions. The plug flow volume VPLUG is estimate ...
DOI:
10.1016/j.powtec.2020.01.084

5. Line matching of wide baseline images in an affine projection space

Author:
Wang, Qiang; Zhang, Wei; Liu, Xiaolong; Zhang, Zhenxin; Baig, Muhammad Hasan Ali; Wang, Guo; He, Long; Cui, Tiejun
Source:
International journal of remote sensing 2020 v.41 no.2 pp. 632-654
ISSN:
1366-5901
Subject:
cameras,   etc   ; buildings; geometry; remote sensing;     Show all 4 Subjects
Abstract:
... Line matching plays an important role in vision localization and three-dimensional reconstruction of building structures. The conventional method of line matching is not effective for processing stereo images with wide baselines and large viewing angles. This paper proposes a line matching method in an affine projection space, aiming to solve the problem of change of viewing angles in aerial obliq ...
DOI:
10.1080/01431161.2019.1646937

6. Cinematographic observation of the deformation of an antibubble when a spark-induced cavitation bubble oscillates in its vicinity

Author:
Lixin, bai; Bai, Lichun; Yan, Jiuchun; bai, Lixin; Zeng, Zhijie; ma, yuhang
Source:
Colloids and surfaces 2020 v.592 pp. 124606
ISSN:
0927-7757
Subject:
video cameras,   etc   ; air; bubbles; deformation; liquids; soaps;     Show all 6 Subjects
Abstract:
... An antibubble is the opposite of a soap bubble: a thin spherical gas shell containing liquid inside and surrounded by liquid outside. The dynamic behaviour of antibubbles when a spark-induced cavitation bubble oscillates in their vicinity is studied using a high-speed video camera. It is found that the rupture process of antibubble impacted by shock wave is different from that of antibubble due to ...
DOI:
10.1016/j.colsurfa.2020.124606

7. LIF or dye: Comparison of different tracing methods for granular solids

Author:
Scheibelhofer, Otto; Kruisz, Julia; Rehrl, Jakob; Faulhammer, Eva; Witschnigg, Andreas; Khinast, Johannes G.
Source:
Powder technology 2020 v.367 pp. 20-31
ISSN:
0032-5910
Subject:
cameras,   etc   ; dyes; fluorescence; photometers; tracer techniques;     Show all 5 Subjects
Abstract:
... Determination of residence time distribution is considered essential for continuous pharmaceutical unit operations, in order to enable process understanding and control. A common way for determining residence times are tracer based methods, yet at the moment most realizations are found in liquid systems whereas use of those methods on granular samples is rarely encountered.Here, we compare two dif ...
DOI:
10.1016/j.powtec.2020.03.033

8. Car speed estimation based on image scale factor

Author:
Costa, Luciano R.; Rauen, Michelle S.; Fronza, Andressa B.
Source:
Forensic science international 2020 v.310 pp. 110229
ISSN:
0379-0738
Subject:
cameras,   etc   ; accidents; forensic sciences; photogrammetry; traffic;     Show all 5 Subjects
Abstract:
... Speed estimation by video analysis has been an increasingly common method for obtaining the speed of vehicles involved in traffic accidents. Generally, the estimate is based on reference measurements obtained on site or on measurements calculated by photogrammetric techniques. In this work, we proposed an alternative method for estimating the speed of a vehicle with longitudinal trajectory relativ ...
DOI:
10.1016/j.forsciint.2020.110229

9. A novel spatial–spectral extraction method for subpixel surface water

Author:
Lv, Yunzhe; Gao, Wei; Yang, Chen; Fang, Zhongxiang
Source:
International journal of remote sensing 2020 v.41 no.7 pp. 2477-2499
ISSN:
1366-5901
Subject:
cameras,   etc   ; Landsat; remote sensing; surface water;     Show all 4 Subjects
Abstract:
... The spectral index provides a feasible and efficient method for extracting land surface water from satellite images. However, existing methods at the pixel scale consider only water bodies but disregard complicated mixtures. Emerging subpixel–scale methods improve water mapping a detailed description, but they still fail to achieve precise identification of various types of mixed pixels. This defi ...
DOI:
10.1080/01431161.2019.1693073

10. A deep-level region-based visual representation architecture for detecting strawberry flowers in an outdoor field

Author:
Lin, P.; Lee, W. S.; Chen, Y. M.; Peres, N.; Fraisse, C.
Source:
Precision agriculture 2020 v.21 no.2 pp. 387-402
ISSN:
1385-2256
Subject:
cameras,   etc   ; flowers; fruit yield; lighting; models; strawberries;     Show all 6 Subjects
Abstract:
... An accurate and robust strawberry flower representation and detection scheme is a key step to enable the reliable forecasting of fruit yield for use in precision agricultural applications. A state-of-the-art deep-level object detection framework which processes images through several layers using a region-based convolutional neural network (R-CNN) was developed to visually represent the instances ...
DOI:
10.1007/s11119-019-09673-7

11. Integrated geometric self-calibration of stereo cameras onboard the ZiYuan-3 satellite

Author:
Yang, Bo; Pi, Yingdong; Li, Xin; Yang, Yuhui
Source:
ISPRS journal of photogrammetry and remote sensing 2020 v.162 pp. 173-183
ISSN:
0924-2716
Subject:
cameras,   etc   ; calibration; geometry; remote sensing; satellites;     Show all 5 Subjects
Abstract:
... The geometric quality of images is a principal concern for a stereo mapping satellite. On-orbit geometric calibration (GC) is an essential processing step that is always performed to ensure the geometric accuracy of satellite images. However, the traditional GC method is typically expensive and inefficient due to a large dependence on ground-based locations. Although recent GC methods based on rel ...
DOI:
10.1016/j.isprsjprs.2020.02.015

12. A unified framework of source camera identification based on features

Author:
Wang, Bo; Zhong, Kun; Shan, Zihao; Zhu, Mei Neng; Sui, Xue
Source:
Forensic science international 2020 v.307 pp. 110109
ISSN:
0379-0738
Subject:
cameras,   etc   ; algorithms; digital images; forensic sciences; models;     Show all 5 Subjects
Abstract:
... Source camera identification, which aims at identifying the source camera of an image, has attracted a wide range of attention in the field of digital image forensics recently. Many approaches to source camera identification have been proposed by extracting some image features. However, most of these methods only focused on extracting features from the single artifact of the camera left on the cap ...
DOI:
10.1016/j.forsciint.2019.110109

13. Multiple Resonance Metamaterial Emitter for Deception of Infrared Emission with Enhanced Energy Dissipation

Author:
Lee, Namkyu; Yoon, Boram; Kim, Taehwan; Bae, Ji-Yeul; Lim, Joon-Soo; Chang, Injoong; Cho, Hyung Hee
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8862-8869
ISSN:
1944-8252
Subject:
cameras,   etc   ; cooling; energy; magnetism; optical properties;     Show all 5 Subjects
Abstract:
... Artificial camouflage surfaces for assimilating with the environment have been utilized for controlling optical properties. Especially, the optical properties of infrared (IR) camouflage materials should be satisfied with two requirements: deception of IR signature in a detected band through reduced emissive energy and dissipation of reduced emissive energy for preventing thermal instability throu ...
DOI:
10.1021/acsami.9b21030

14. Encapsulation with an interfacial liquid layer: Robust and efficient liquid-liquid wrapping

Author:
Misra, Sirshendu; Trinavee, Kumari; Gunda, Naga Siva Kumar; Mitra, Sushanta K.
Source:
Journal of colloid and interface science 2020 v.558 pp. 334-344
ISSN:
0021-9797
Subject:
cameras,   etc   ; encapsulation; kinetic energy; liquids; thermodynamics;     Show all 5 Subjects
Abstract:
... We developed an impact driven liquid-based encapsulation method by utilizing the fundamental thermodynamic tendency of a suitable three-liquid combination towards formation of a core-shell structure.Stable wrapping is achieved by impinging a core drop from a vertical separation on an interfacial liquid film floating on a host liquid bath. The resulting interfacial dynamics is captured using a high ...
DOI:
10.1016/j.jcis.2019.09.099

15. A Frustum-based probabilistic framework for 3D object detection by fusion of LiDAR and camera data

Author:
Gong, Zheng; Lin, Haojia; Zhang, Dedong; Luo, Zhipeng; Zelek, John; Chen, Yiping; Nurunnabi, Abdul; Wang, Cheng; Li, Jonathan
Source:
ISPRS journal of photogrammetry and remote sensing 2020 v.159 pp. 90-100
ISSN:
0924-2716
Subject:
cameras,   etc   ; data collection; lidar; neural networks; probability;     Show all 5 Subjects
Abstract:
... This paper presents a real-time 3D object detector based on LiDAR based Simultaneous Localization and Mapping (LiDAR-SLAM). The 3D point clouds acquired by mobile LiDAR systems, within the environment of buildings, are usually highly sparse, irregularly distributed, and often contain occlusion and structural ambiguity. Existing 3D object detection methods based on Convolutional Neural Networks (CN ...
DOI:
10.1016/j.isprsjprs.2019.10.015

16. Panoramic SLAM from a multiple fisheye camera rig

Author:
Ji, Shunping; Qin, Zijie; Shan, Jie; Lu, Meng
Source:
ISPRS journal of photogrammetry and remote sensing 2020 v.159 pp. 169-183
ISSN:
0924-2716
Subject:
cameras,   etc   ; algorithms; data collection; models; urban areas;     Show all 5 Subjects
Abstract:
... This paper presents a feature-based simultaneous localization and mapping (SLAM) system for panoramic image sequences obtained from a multiple fisheye camera rig in a wide baseline mobile mapping system (MMS). First, the developed fisheye camera calibration method combines an equidistance projection model and trigonometric polynomial to achieve high-accuracy calibration from the fisheye camera to ...
DOI:
10.1016/j.isprsjprs.2019.11.014

17. Develop a high energy proton beam position monitor using linear contact image sensor

Author:
Hsiao, Tung-Yuan; Niu, Huan; Chen, Tzung-Yuang; Chen, Chien-Hsu
Source:
MethodsX 2020 v.7 pp. 100773
ISSN:
2215-0161
Subject:
cameras,   etc   ; energy; irradiation; quality control; therapeutics;     Show all 5 Subjects
Abstract:
... A compact beam-position monitor was constructed using a linear contact image sensor attached to a plastic scintillator and tested using a 230 MeV proton beam. The results indicate that the beam position can be obtained in real-time, and the beam position with a precision of up to 0.03 mm. The compactness and high precision of the device hold considerable potential for it to be used as a beam-posit ...
DOI:
10.1016/j.mex.2019.100773
PubMed:
32140438
PubMed Central:
PMC7046811

18. Methods of Research of Foil Bearings in START-STOP Cycle in the Presence of Working Medium

Author:
Moczulak, Bartosz; Miąskowski, Wojciech
Source:
Agricultural Engineering 2019 v.23 no.4 pp. 41-51
ISSN:
2449-5999
Subject:
cameras,   etc   ; foil; temperature;     Show all 3 Subjects
Abstract:
... A method for testing sliding bearings with an elastic bearing liner was presented in the paper with a focus on the issue of selection of particular time intervals of the START-STOP test cycle. Then, results of the tests carried out according to the selected material combinations were presented. The working cycle of foil bearings tested on the test stand was performed in an automatic mode at the se ...
DOI:
10.1515/agriceng-2019-0035

19. Plenoptic camera calibration based on microlens distortion modelling

Author:
Darwish, Walid; Bolsee, Quentin; Munteanu, Adrian
Source:
ISPRS journal of photogrammetry and remote sensing 2019 v.158 pp. 146-154
ISSN:
0924-2716
Subject:
cameras,   etc   ; calibration; geometry; models;     Show all 4 Subjects
Abstract:
... Light field cameras have become a popular device for handheld, passive depth estimation. The geometry of the captured light rays can be equivalently described as a virtual camera array, where each view is taken from a different point on a regular grid. With this paper, we propose describing the effect of the main lens and microlens distortion on both the captured views, and on their position on th ...
DOI:
10.1016/j.isprsjprs.2019.10.008

20. Non-Intrusive Underwater Measurement of Local Scour Around a Bridge Pier

Author:
Poggi, Davide; Kudryavtseva, Natalia O.
Source:
Water 2019 v.11 no.10
ISSN:
2073-4441
Subject:
cameras,   etc   ; equations; monitoring;     Show all 3 Subjects
Abstract:
... A non-intrusive low-cost technique for monitoring the temporal and spatial evolution of the scour hole around bridge piers is presented. The setup for the application of the technique is simple, low-cost and non-intrusive. It couples a line laser source and commercial camera to get a fast and accurate measurement of the whole scour hole in the front and behind the bridge pier. A short campaign of ...
DOI:
10.3390/w11102063