Abstract
In this paper the performance of total focusing method is compared with the widely used time-reversal MUSIC super resolution technique. The algorithms are tested with simulated and experimental ultrasonic array data, each containing different noise levels. The simulated time domain signals allow the effects of array geometry, frequency, scatterer location, scatterer size, scatterer separation and random noise to be carefully controlled. The performance of the imaging algorithms is evaluated in terms of resolution and sensitivity to random noise. It is shown that for the low noise situation, time-reversal MUSIC provides enhanced lateral resolution when compared to the total focusing method. However, for higher noise levels, the total focusing method shows robustness, whilst the performance of time-reversal MUSIC is significantly degraded.
Original language | English |
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Title of host publication | AIP Conference Proceedings |
Publisher | American Institute of Physics (AIP) |
Pages | 171-178 |
Number of pages | 8 |
Volume | 1581 33 |
ISBN (Print) | 9780735412118 |
DOIs | |
Publication status | Published - 1 Jan 2014 |
Event | 40th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2013): Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013 - Baltimore, MD, United States Duration: 21 Jul 2013 → 26 Jul 2013 Conference number: 40 |
Conference
Conference | 40th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2013) |
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Abbreviated title | QNDE 2013 |
Country/Territory | United States |
City | Baltimore, MD |
Period | 21/07/13 → 26/07/13 |
Keywords
- Modeling
- Noise
- Post Processing
- Resolution
- Ultrasonic Array