Suppression of the Fluctuation Effect in Terahertz Imaging using Filtering |
Author(s): |
| Yogesh Varma , VJTI College Mumbai; Basil A M, SAMEER Mumbai |
Keywords: |
| Fluctuation Effect, Filtering |
Abstract |
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To suppress the fluctuation effect due to laser power instability and terahertz radiation fluctuation,different types of filtering method are proposed to process the terahertz images obtained from a pulsed terahertz raster scanning imaging system. The physical model of filtering for terahertz imaging is established. The mathematical expressions are given with the specific physical meaning in accordance with the imaging principle. To demonstrate the effectiveness of the method, a filtering experiment based on two raw terahertz images obtained from the femtosecond laser using a continuous-wave (CW) terahertz source is performed. The effect of the method and the advantages of different filtering are discussed. The pulsed- and CW-terahertz image processing results both show that in addition to suppressing the fluctuation effect, the method can also enhance target imaging. |
Other Details |
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Paper ID: IJSRDV3I40977 Published in: Volume : 3, Issue : 4 Publication Date: 01/07/2015 Page(s): 3018-3021 |
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