TOMOGRAPHIC IMAGE RECONSTRUCTION USING PARALLEL-BEAM PROJECTION WITH MICROWAVE FREQUENCY FOR HOLLOW TREES DETECTION
Tomography is a technique for reconstructing an image of object cross-section using emitted waves. In this study, frequency selection and measurement systems for microwave tomography are proposed. Frequency selection is intended to determine the characteristics of microwave tomography using parallel...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/30435 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Tomography is a technique for reconstructing an image of object cross-section using emitted waves. In this study, frequency selection and measurement systems for microwave tomography are proposed. Frequency selection is intended to determine the characteristics of microwave tomography using parallel-beam projection. Perforated wood is used as a target that represents a hollow tree trunk. The microwave frequency used is 1.5 GHz, 3 GHz, and 4.5 GHz. The antenna used for measuring parallel-beam projections is a rectangular patch. Filtered back-projection, Algebraic Reconstruction Technique and back-propagation is used to reconstruct the image of parallel-beam projections. The results of this approach are evaluated for each frequency used. From the reconstruction image, a microwave frequency is chosen which can provide refractive index distribution information between wood and cavity more clearly. |
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