scholarly journals Real-time 3D thermoacoustic imaging and thermometry using a self-calibration technique

2020 ◽  
Vol 59 (22) ◽  
pp. G255
Author(s):  
Ehab A. Tamimi ◽  
Hao Xin ◽  
Russell S. Witte
Keyword(s):  
Real Time ◽  
Calibration Technique ◽  
Self Calibration ◽  
Thermoacoustic Imaging

scholarly journals TERRESTRIAL LASER SCANNERS SELF-CALIBRATION STUDY: DATUM CONSTRAINTS ANALYSES FOR NETWORK CONFIGURATIONS

2015 ◽  
Vol XL-2/W4 ◽  
pp. 1-9 ◽  
Author(s):  
M. A. Abbas ◽  
H. Setan ◽  
Z. Majid ◽  
A. K. Chong ◽  
L. Chong Luh ◽  
...  
Keyword(s):  
Laser Scanner ◽  
Network Configuration ◽  
Calibration Technique ◽  
Self Calibration ◽  
Laser Scanners ◽  
Different Types ◽  
Minimum Number ◽  
Calibration Study ◽  
Different Sources ◽  
Selection Of

Similar to other electronic instruments, terrestrial laser scanner (TLS) can also inherent with various systematic errors coming from different sources. Self-calibration technique is a method available to investigate these errors for TLS which were adopted from photogrammetry technique. According to the photogrammetry principle, the selection of datum constraints can cause different types of parameter correlations. However, the network configuration applied by TLS and photogrammetry calibrations are quite different, thus, this study has investigated the significant of photogrammetry datum constraints principle in TLS self-calibration. To ensure that the assessment is thorough, the datum constraints analyses were carried out using three variant network configurations: 1) minimum number of scan stations; 2) minimum number of surfaces for targets distribution; and 3) minimum number of point targets. Based on graphical and statistical, the analyses of datum constraints selection indicated that the parameter correlations obtained are significantly similar. In addition, the analysis has demonstrated that network configuration is a very crucial factor to reduce the correlation between the calculated parameters.

Real-Time Trimodal Ultrasound, Photoacoustic, and Thermoacoustic Imaging for Biomedical Applications

2021 ◽  
Author(s):  
Eric Reichel ◽  
Ehab Tamimi ◽  
Clara Curiel-Lewandrowski ◽  
Russell S. Witte
Keyword(s):  
Real Time ◽  
Biomedical Applications ◽  
Thermoacoustic Imaging

An Intrinsic Parameters Self-Calibration Technique Based on Infinite Homography between Orthogonal Vanishing Points

2015 ◽  
Vol 42 (12) ◽  
pp. 1208001
Author(s):  
洪洋 Hong Yang ◽  
孙秀霞 Sun Xiuxia ◽  
蔡鸣 Cai Ming ◽  
刘树光 Liu Shuguang ◽  
付强 Fu Qiang
Keyword(s):  
Calibration Technique ◽  
Vanishing Points ◽  
Intrinsic Parameters ◽  
Self Calibration

Application of high-precision temperature-controlled FBG filter and light source self-calibration technique in the BOTDR sensor system

2012 ◽  
Vol 10 (7) ◽  
pp. 072901-72904 ◽  
Author(s):  
Jiacheng Hu Jiacheng Hu ◽  
Fuchang Chen Fuchang Chen ◽  
Chengtao Zhang Chengtao Zhang ◽  
Zunqi Lin Zunqi Lin
Keyword(s):  
Light Source ◽  
High Precision ◽  
Sensor System ◽  
Calibration Technique ◽  
Self Calibration ◽  
Precision Temperature ◽  
Temperature Controlled
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