A novel demodulation algorithm for CMOS camera-based VLC using adjacent pixel threshold

2019 ◽  
Author(s):  
Jihong Liu ◽  
Xiaoyu Zheng ◽  
Jia Zhang ◽  
Yongchao Wang
Keyword(s):  
Cmos Camera ◽  
Adjacent Pixel

scholarly journals Characterization of a back-illuminated CMOS camera for soft x-ray coherent scattering

2019 ◽  
Author(s):  
Kewin Desjardins ◽  
Horia Popescu ◽  
Pascal Mercère ◽  
Claude Menneglier ◽  
Roland Gaudemer ◽  
...  
Keyword(s):  
Coherent Scattering ◽  
Cmos Camera ◽  
X Ray ◽  
Back Illuminated

scholarly journals Directional Dark Matter Searches with CYGNO

Particles ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 343-353
Author(s):  
Fernando Domingues Amaro ◽  
Elisabetta Baracchini ◽  
Luigi Benussi ◽  
Stefano Bianco ◽  
Cesidio Capoccia ◽  
...  
Keyword(s):  
Dark Matter ◽  
Atmospheric Pressure ◽  
Time Projection Chamber ◽  
Negative Ion ◽  
Cmos Camera ◽  
Resolution Time ◽  
3D Tracking ◽  
Ion Drift ◽  
Optical Readout ◽  
Time Projection

The CYGNO project aims at developing a high resolution Time Projection Chamber with optical readout for directional dark matter searches and solar neutrino spectroscopy. Peculiar CYGNO’s features are the 3D tracking capability provided by the combination of photomultipliers and scientific CMOS camera signals, combined with a helium-fluorine-based gas mixture at atmospheric pressure amplified by gas electron multipliers structures. In this paper, the performances achieved with CYGNO prototypes and the prospects for the upcoming underground installation at Laboratori Nazionali del Gran Sasso of a 50-L detector in fall 2021 will be discussed, together with the plans for a 1-m3 experiment. The synergy with the ERC consolidator, grant project INITIUM, aimed at realising negative ion drift operation within the CYGNO 3D optical approach, will be further illustrated.

Structure of an Embedded System Software Platform for Plate Recognition System Based on Applied Mechanics

2012 ◽  
Vol 460 ◽  
pp. 266-270
Author(s):  
Xing Wu Sun ◽  
Yu Chen ◽  
Ai Fei Wang
Keyword(s):  
Embedded System ◽  
Recognition System ◽  
Cmos Camera ◽  
Camera System ◽  
New Thought ◽  
Development Platform ◽  
Embedded Linux System ◽  
Acquisition Device ◽  
The Embedded System ◽  
And Control

According to the shortcomings of large volume and high cost about the plate recognition system, an embedded plate recognition system is developed based on the ARM11 processor at lower costs. Taking the embedded Linux system as the software development platform, the system uses graphical user interface to operate and control the machine. Using CMOS camera system as image acquisition device, the system adopts HSV algorithm to realize the image classification on the platform of the embedded plate recognition system. The experimental results show that the embedded system runs stably, can realize the plate classification by color, and has the advantages of small size, low power consumption, convenience for using and so on. The embedded system provides a new thought for plate recognition.

Development of a simultaneous imaging system to measure the optical and gamma ray images of Ir-192 source for high-dose-rate brachytherapy

2021 ◽  
Vol 16 (12) ◽  
pp. T12005
Author(s):  
J. Nagata ◽  
S. Yamamoto ◽  
Y. Noguchi ◽  
T. Nakaya ◽  
K. Okudaira ◽  
...  
Keyword(s):  
Dose Rate ◽  
Spatial Resolution ◽  
Gamma Camera ◽  
Gamma Ray ◽  
Imaging System ◽  
High Dose Rate ◽  
High Dose ◽  
Cmos Camera ◽  
Absolute Position ◽  
The Absolute

Abstract In high-dose-rate (HDR) brachytherapy, verification of the Ir-192 source's position during treatment is needed because such a source is extremely radioactive. One of the methods used to measure the source position is based on imaging the gamma rays from the source, but the absolute position in a patient cannot be confirmed. To confirm the absolute position, it is necessary to acquire an optical image in addition to the gamma ray image at the same time as well as the same position. To simultaneously image the gamma ray and optical images, we developed an imaging system composed of a low-sensitivity, high-resolution gamma camera integrated with a CMOS camera. The gamma camera has a 1-mm-thick cerium-doped yttrium aluminum perovskite (YAIO3: YAP(Ce)) scintillator plate optically coupled to a position-sensitive photomultiplier (PSPMT), and a 0.1-mm-diameter pinhole collimator was mounted in front of the camera to improve spatial resolution and reduce sensitivity. We employed the concept of a periscope by placing two mirrors tilted at 45 degrees facing each other in front of the gamma camera to image the same field of view (FOV) for the gamma camera and the CMOS camera. The spatial resolution of the imaging system without the mirrors at 100 mm from the Ir-192 source was 3.2 mm FWHM, and the sensitivity was 0.283 cps/MBq. There was almost no performance degradation observed when the mirrors were positioned in front of the gamma camera. The developed system could measure the Ir-192 source positions in optical and gamma ray images. We conclude that the developed imaging system has the potential to measure the absolute position of an Ir-192 source in real-time clinical measurements.

A new method for evaluating postural hand tremor based on CMOS camera

Optik ◽  
2015 ◽  
Vol 126 (5) ◽  
pp. 507-512 ◽  
Author(s):  
Ling-lin Xia ◽  
Bing Zou ◽  
Hao Liu ◽  
Hai Su ◽  
Huang Qianghui
Keyword(s):  
New Method ◽  
Cmos Camera ◽  
Hand Tremor
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