scholarly journals Recognition of Banknote Fitness Based on a Fuzzy System Using Visible Light Reflection and Near-infrared Light Transmission Images

Sensors ◽  
2016 ◽  
Vol 16 (6) ◽  
pp. 863 ◽  
Author(s):  
Seung Kwon ◽  
Tuyen Pham ◽  
Kang Park ◽  
Dae Jeong ◽  
Sungsoo Yoon
Keyword(s):  
Visible Light ◽  
Fuzzy System ◽  
Near Infrared ◽  
Light Transmission ◽  
Infrared Light ◽  
Light Reflection ◽  
Near Infrared Light

scholarly journals IMAGING DIAGNOSTICS OF COMBUSTION INSTABILITY IN PREMIXED SWIRLING COMBUSTION

2020 ◽  
Vol 4 ◽  
pp. 80-93
Author(s):  
Yao Yang ◽  
Gaofeng Wang ◽  
Yuanqi Fang ◽  
YIfan Xia ◽  
Liang Zhong
Keyword(s):  
Visible Light ◽  
Near Infrared ◽  
Combustion Instability ◽  
Infrared Light ◽  
Imaging Method ◽  
Near Infrared Light ◽  
Stable Combustion ◽  
Significant Difference ◽  
Unstable Combustion ◽  
Swirling Flames

An experimental study on combustion instability is presented with focus on propane-air premixed swirling flames. Swirling flames under self-excited oscillation are studied by imaging of visible light and OH* chemiluminescence filter under several typical conditions. The dynamical characteristics of swirling flames were analysed by Dynamic Mode Decomposition (DMD) method. Three types of unstable modes in the combustor system were observed, which correspond to typical acoustic resonant modes (LF mode, C1/4 mode and P1/2 mode) of the combustor system. The combustion instability is in the longitudinal mode. Furthermore, the structure of downstream hot burnt gas under stable combustion and unstable combustion is studied by imaging of visible light and near-infrared light. Results show that there is a significant difference in the downstream flow under stable combustion and unstable combustion. The DMD spectrum of the flame and the downstream hot burnt gas obtained is the same, which is close to the characteristic frequency of acoustic pressure captured by the microphone signal. The visible light and near-infrared light imaging observation method adopted in this paper provides a new imaging method for the investigation of thermo-acoustic instability.

scholarly journals Deep Learning-Based Multinational Banknote Fitness Classification with a Combination of Visible-Light Reflection and Infrared-Light Transmission Images

Symmetry ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 431 ◽  
Author(s):  
Tuyen Pham ◽  
Dat Nguyen ◽  
Jin Kang ◽  
Kang Park
Keyword(s):  
Visible Light ◽  
Light Transmission ◽  
The United States ◽  
Infrared Light ◽  
Light Reflection ◽  
Fitness Level ◽  
United States Dollar ◽  
Automated Teller Machines ◽  
Fitness Levels

The fitness classification of a banknote is important as it assesses the quality of banknotes in automated banknote sorting facilities, such as counting or automated teller machines. The popular approaches are primarily based on image processing, with banknote images acquired by various sensors. However, most of these methods assume that the currency type, denomination, and exposed direction of the banknote are known. In other words, not only is a pre-classification of the type of input banknote required, but in some cases, the type of currency is required to be manually selected. To address this problem, we propose a multinational banknote fitness-classification method that simultaneously determines the fitness level of a banknote from multiple countries. This is achieved without the pre-classification of input direction and denomination of the banknote, using visible-light reflection and infrared-light transmission images of banknotes, and a convolutional neural network. The experimental results on the combined banknote image database consisting of the Indian rupee and Korean won with three fitness levels, and the United States dollar with two fitness levels, show that the proposed method achieves better accuracy than other fitness classification methods.

scholarly journals Transcranial Red and Near Infrared Light Transmission in a Cadaveric Model

PLoS ONE ◽  
2012 ◽  
Vol 7 (10) ◽  
pp. e47460 ◽  
Author(s):  
Jared R. Jagdeo ◽  
Lauren E. Adams ◽  
Neil I. Brody ◽  
Daniel M. Siegel
Keyword(s):  
Near Infrared ◽  
Light Transmission ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Cadaveric Model

Biomimetics in Energy Systems: Light Transmission in the Window Plant Fenestraria aurantiaca as Inspiration for New Solutions in the Technical World

2012 ◽  
Vol 84 ◽  
pp. 51-56 ◽  
Author(s):  
Immanuel Schäfer
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Mobile Devices ◽  
Near Infrared ◽  
Light Transmission ◽  
Energy Systems ◽  
Surface Cleaning ◽  
Infrared Light ◽  
Direct Sunlight ◽  
Light Concentration

Fenestraria aurantiaca (also known as window plant) is a succulent with specialized adaptations to deal with heat, light and aridity. Fenestraria aurantiaca (F. a.) grows with most of its body under the sand. Just the top, with a light transparent surface – the window – on it, protrudes from the surface hence giving explanation to the plants name. Experiments with light, and detailed microscopy studies show the physical, biological and chemical capabilities of F. a. It was found that the window works as a lens, light from a 90 ° angle is directed into the plant. Thereby the window filters the light. Up to 90 % of the visible light is blocked; with rising wavelength the window gets more transparent until the near infrared light (1000 nm) where the transparency declines rapidly. But the parenchyma is up 90 % transparent. Based on those results the principles of the plant were defined, which are used for abstractions. Generally F.a. has four principles: light handling, surface cleaning, heat avoidance and water storing. Improvements founded on the inspiration of the window plant seem to be possible in photovoltaic systems, which have problems with overheating and also light concentration. An example solution called “buried solar cells” is presented. Another working field is the screen of mobile devices, where the clarity and readability suffers from direct sunlight. With the help from the methods displayed by F.a., there is an energy saving solution explained.

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