Assessing changes in oxygen saturation using a low cost multi-spectral imaging system

2019 ◽  
Author(s):  
Amir S. Bernat ◽  
Frank J. Bolton ◽  
Kfir Bar-Am ◽  
Steven L. Jacques ◽  
David Levitz
Keyword(s):  
Oxygen Saturation ◽  
Imaging System ◽  
Low Cost ◽  
Spectral Imaging

Determination of oxygen saturation of the optic nerve head and overlying artery and vein using a snapshot multi-spectral imaging system

2012 ◽  
Author(s):  
Bahram Khoobehi ◽  
Alexander Eaton ◽  
Hussein Wafapoor ◽  
Paul Fournier ◽  
Kim Firn ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Oxygen Saturation ◽  
Optic Nerve Head ◽  
Imaging System ◽  
Spectral Imaging

scholarly journals Calibration of a Hyper-Spectral Imaging System Using a Low-Cost Reference

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3738
Author(s):  
Muhammad Saad Shaikh ◽  
Keyvan Jaferzadeh ◽  
Benny Thörnberg ◽  
Johan Casselgren
Keyword(s):  
Spectral Distribution ◽  
Imaging System ◽  
Low Cost ◽  
Spectral Imaging ◽  
Principal Component ◽  
Calibration Procedure ◽  
Material Surface ◽  
Hyper Spectral ◽  
Data Clusters ◽  
Hyper Spectral Imaging

In this paper, we present a hyper-spectral imaging system and practical calibration procedure using a low-cost calibration reference made of polytetrafluoroethylene. The imaging system includes a hyperspectral camera and an active source of illumination with a variable spectral distribution of intensity. The calibration reference is used to measure the relative reflectance of any material surface independent of the spectral distribution of light and camera sensitivity. Winter road conditions are taken as a test application, and several spectral images of snow, icy asphalt, dry asphalt, and wet asphalt were made at different exposure times using different illumination spectra. Graphs showing measured relative reflectance for different road conditions support the conclusion that measurements are independent of illumination. Principal component analysis of the acquired spectral data for road conditions shows well separated data clusters, demonstrating the system’s suitability for material classification.

scholarly journals Low-cost hyper-spectral imaging system using a linear variable bandpass filter for agritech applications

2020 ◽  
Vol 59 (5) ◽  
pp. A167
Author(s):  
Shigeng Song ◽  
Des Gibson ◽  
Sam Ahmadzadeh ◽  
Hin On Chu ◽  
Barry Warden ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Imaging System ◽  
Low Cost ◽  
Spectral Imaging ◽  
Hyper Spectral ◽  
Hyper Spectral Imaging

scholarly journals A low-cost, portable, and quantitative spectral imaging system for application to biological tissues

2010 ◽  
Vol 18 (12) ◽  
pp. 12630 ◽  
Author(s):  
Henry L. Fu ◽  
Bing Yu ◽  
Justin Y Lo ◽  
Greg M. Palmer ◽  
Thomas F. Kuech ◽  
...  
Keyword(s):  
Imaging System ◽  
Low Cost ◽  
Spectral Imaging ◽  
Biological Tissues

Low-cost high-performance CMOS terahertz imaging system

2015 ◽  
Author(s):  
Chung Hsing Li ◽  
Tzu-Chao Yan ◽  
Yuhsin Chang ◽  
Chyong Chen ◽  
Chien-Nan Kuo
Keyword(s):  
High Performance ◽  
Imaging System ◽  
Low Cost ◽  
Terahertz Imaging

scholarly journals Analysis of Compound Stained Cervical Cell Images Using Multi-Spectral Imaging

2021 ◽  
Vol 11 (12) ◽  
pp. 5628
Author(s):  
Run Fang ◽  
Libo Zeng ◽  
Fan Yi
Keyword(s):  
Cervical Cancer ◽  
Mouse Liver ◽  
Imaging System ◽  
Color Image ◽  
Imaging Technique ◽  
Screening Method ◽  
Spectral Imaging ◽  
High Accuracy ◽  
Cervical Cell ◽  
Real World Applications

Multi-spectral imaging technique plays an important role in real-world applications such as medicine and medical detections. This paper proposes a cervical cancer cell screening method to simultaneously adopt TBS classification and DNA quantitative analysis for a single cell smear. Through using compound staining on a smear, the cytoplasm is stained by Papanicolauo and the nucleus is stained by Feulgen. The main evaluation parameter is the DNA content of the nucleus, not the subjective description of cell morphology, which is more objective than the TBS classification method and reduces the chances of missing a diagnosis due to subjective factors. Each nucleus has its own DI value and color image of the whole cell, which is convenient for doctors as it allows them to review and confirm the morphology of cells with a nucleus DI of over 2.5. Mouse liver smears and cervical cases are utilized as the measuring specimens to evaluate the performance of the microscope multi-spectral imaging system; illustrative results demonstrate that the proposed system qualifies, with high accuracy and reliability, and further presents wide application prospects in the early diagnosis of cervical cancer.

A low-cost laboratory thermal wave imaging system

1984 ◽  
Vol 17 (6) ◽  
pp. 526-532 ◽  
Author(s):  
G F Kirkbright ◽  
R M Miller ◽  
A Rzadkiewicz
Keyword(s):  
Thermal Wave ◽  
Imaging System ◽  
Low Cost ◽  
Wave Imaging ◽  
Thermal Wave Imaging

scholarly journals Fast, Robust, and Low-Cost Microwave Imaging of Multiple Non-Metallic Pipes

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1762
Author(s):  
Yuki Gao ◽  
Maryam Ravan ◽  
Reza K. Amineh
Keyword(s):  
Antenna Arrays ◽  
Oil And Gas ◽  
Imaging System ◽  
Imaging Techniques ◽  
Low Cost ◽  
Microwave Imaging ◽  
Airport Security ◽  
Destructive Testing ◽  
Security Screening ◽  
Industrial Sectors

The use of non-metallic pipes and composite components that are low-cost, durable, light-weight, and resilient to corrosion is growing rapidly in various industrial sectors such as oil and gas industries in the form of non-metallic composite pipes. While these components are still prone to damages, traditional non-destructive testing (NDT) techniques such as eddy current technique and magnetic flux leakage technique cannot be utilized for inspection of these components. Microwave imaging can fill this gap as a favorable technique to perform inspection of non-metallic pipes. Holographic microwave imaging techniques are fast and robust and have been successfully employed in applications such as airport security screening and underground imaging. Here, we extend the use of holographic microwave imaging to inspection of multiple concentric pipes. To increase the speed of data acquisition, we utilize antenna arrays along the azimuthal direction in a cylindrical setup. A parametric study and demonstration of the performance of the proposed imaging system will be provided.

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