Multimodal image processing for characterizing high-temperature thermo-optical impact on imaging performance

2019 ◽  
Author(s):  
Woo-Yong Jang ◽  
James Park ◽  
Robert Schueler ◽  
Michael Noyola
Keyword(s):  
Image Processing ◽  
High Temperature ◽  
Imaging Performance ◽  
Optical Impact

scholarly journals Linking the Effect of Aggregate Interaction to the Compaction Theory for Asphalt Mixtures Using Image Processing

2018 ◽  
Vol 8 (11) ◽  
pp. 2045 ◽  
Author(s):  
Kyoungchul Kim ◽  
Myungook Kang
Keyword(s):  
Image Processing ◽  
High Temperature ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Energy Index ◽  
Optimum Temperature ◽  
Frictional Behavior ◽  
Viscosity Effect ◽  
Frictional Interaction ◽  
Compaction Energy

This study presents a modified compaction concept of asphalt mixtures based on aggregate frictional behavior using self-developed image processing for measuring the aggregate orientation. The compaction energy index was introduced to evaluate the aggregate orientation on different compaction temperatures. For the better rearrangement of aggregates, there was an optimum temperature at which a preferred orientation exists, providing lower compaction efforts. An excessively high temperature reduced the asphalt contents for lubrication and caused additional aggregate friction to require higher compaction efforts. This phenomenon can be found in the changes of the volume of the effective asphalt binder (Veac) and the absorbed asphalt binder (Pba). The mixture produced higher Veac, at which an optimum compaction temperature required lower compaction energy. Despite being higher than the optimum temperature for the PG62-28 mixture, the Veac decreased by 0.4%. An increase of 0.35% in the Pba was inferred to flow into the aggregates. Clearly, a reduction of lubricant in the mixture caused a higher frictional interaction between aggregates. Changes in the Veac and the Pba can eliminate the viscosity effect for the rearrangement of aggregates. Based on the aggregate orientation and change in mixture volumetrics, the aggregate interaction effect was introduced to the Mohr–Coulomb compaction theory to explain the additional friction.

scholarly journals Measurements of Temperature Distribution for High Temperature Steel Plates Based on Digital Image Correlation

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3322 ◽  
Author(s):  
Pengyuan Qi ◽  
Gang Wang ◽  
Zhen Gao ◽  
Xianghua Liu ◽  
Weijie Liu
Keyword(s):  
Image Processing ◽  
High Temperature ◽  
Temperature Distribution ◽  
Digital Image Correlation ◽  
Measurement System ◽  
Steel Plate ◽  
Steel Plates ◽  
Image Correlation ◽  
Distribution Measurement ◽  
Temperature Distribution Measurement

Temperature distribution is an important process parameter of steel plates during electromagnetic induction heating treatment. This study uses the digital image correlation method to develop an effective non-contact temperature measurement that allows obtaining valuable information about the temperature value of a high temperature steel plate specimen and analyzing its temperature distribution. A principle of thermal radiation temperature measurement based on the color chagre couled device (CCD) technology was introduced. The image processing system encapsulates the image update module, form mode module, image event module and temperature analysis module. The error analysis and temperature calibration were carried out to make sure the error deviation of the measurement system was within a small range. The temperature distribution of B1500HS at high temperature was analyzed by the designed measurement system which was in good agreement with the result from Raynger 3i Plus temperature gun, indicating that the measurement system based on image processing basically meets the requirements of temperature distribution measurement of a high temperature steel plate, and provides an important reference for a high temperature steel plate in non-contact temperature distribution measurement.

Characterization of high-temperature nuclear fuel-coolant interactions through X-ray visualization and image processing

2021 ◽  
Vol 151 ◽  
pp. 107881
Author(s):  
Michael Johnson ◽  
Christophe Journeau ◽  
Ken-ichi Matsuba ◽  
Yuki Emura ◽  
Kenji Kamiyama
Keyword(s):  
Image Processing ◽  
High Temperature ◽  
Nuclear Fuel ◽  
X Ray

scholarly journals Rapid Yeast Cell Viability Analysis by Using a Portable Microscope Based on the Fiber Optic Array and Simple Image Processing

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2092
Author(s):  
Weiming Wang ◽  
Hang Liu ◽  
Yan Yu ◽  
Fengyu Cong ◽  
Jun Yu
Keyword(s):  
Image Processing ◽  
Fiber Optic ◽  
Coupling Efficiency ◽  
Yeast Cells ◽  
Viability Analysis ◽  
Manual Counting ◽  
Microscope Imaging ◽  
Optic Array ◽  
Imaging Performance ◽  
Large Magnification

A fiber optic array (FOA) can be used as an alternative or a supplement to the lens in a microscope due to its large magnification, high coupling efficiency and extremely low distortion. Based on our previous research, this paper first demonstrated the resolution and field-of-view (FOV) of the microscope based on the FOA. To further validate the FOA microscope’s imaging capability, yeast activity and concentration were investigated by simple image processing. The results showed that the percentages of live and dead yeast cells correctly identified were 92.1% and 84.8%, except for the clusters, which agreed well with the manual counting methods. Then, the performances of the portable microscopes based on the FOA and lens were compared and the factors that affect the FOA microscope imaging performance were analyzed.

A Long-Term Local Deformation Measurement System for Notched Specimen at High Temperature

2007 ◽  
Author(s):  
Yangyan Zheng ◽  
Xiang Ling ◽  
Jianjun Chen
Keyword(s):  
Image Processing ◽  
High Temperature ◽  
Digital Image Processing ◽  
Optical Fibers ◽  
Creep Deformation ◽  
Ccd Camera ◽  
Processing Software ◽  
Image Processing Software ◽  
Working Distance

This paper describes the design and evaluation of a novel optical instrumentation system that has been developed for measuring high temperature creep deformation under long-term loads. The system includes short optical fibers, a super long working distance microscope, a CCD camera, and digital image processing software. Short optical fibers are pasted on the small region on one side of the specimen surface as markings. The two optical fibers are illuminated by a light and are focused onto the CCD camera by the super long working distance microscope. The images tracked at intervals are processed by digital image processing software. The distance between the fibers at each picture can be measured. The local creep deformations versus time are obtained by measuring the variation of relative distance between the fibers. Experiments on Cr5Mo notched specimens were carried out. The results demonstrate that the system is capable of measuring creep deformation at elevated temperature.

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