Abstract
In this study, an algorithm to the detection and imaging of hidden arms for passive millimeter-wave (PMMW) imaging systems is proposed. This technique is; in fact, an improved version of our previously developed auto-classification algorithm by extending it by exploiting the Otsu’s multi-level thresholding method. The detailed derivation and the brief steps of the proposed algorithm are given. The proposed algorithm is tested and validated by real PMMW images obtained by a real radiometric imaging system. Resultant measured images are obtained with the employment of signal and image processing procedures of the suggested technique. It is demonstrated by the constructed PMMW images that proposed technique successfully detects a concealed metal threat and also predicts its size by drawing the shape outline based on Otsu’s multi-level thresholding routine that was specially tailored to our auto-classification technique.
Acknowledgements
This work was supported by Mersin University Scientific Research Unit under Project No. 2017-1-TP3-2129. The authors are also grateful to Dr İlhami Ünal, Mr Mustafa Kılıç and Mr Mustafa Tekbaş for his help during the experiments.
References
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© 2019 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Research Articles
- A Wideband Polarization Reconfigurable Antenna Array Based on Mode Combination Method
- RCS Enhancement of Dielectric Resonator Tag Using Spherical Lens
- Design and Analysis of Full and Half Mode Substrate Integrated Waveguide Planar Leaky Wave Antenna with Continuous Beam Scanning in X-Ku Band
- A Multi-Thresholding Method Based on Otsu’s Algorithm for the Detection of Concealed Threats in Passive Millimeter-Wave Images
- Investigation of Nanomaterial Dipoles for SAR Reduction in Human Head
- A Balanced Dual-Band BPF Based on C-CSRR with Improved Passband Selectivity
- Two- and Four-Pole Multilayer SIW Filter with High Selectivity and Higher-Order Mode Suppression
- Microstrip Lowpass Filter with Ultra-Wide Stopband Using Folded Structures
Articles in the same Issue
- Frontmatter
- Research Articles
- A Wideband Polarization Reconfigurable Antenna Array Based on Mode Combination Method
- RCS Enhancement of Dielectric Resonator Tag Using Spherical Lens
- Design and Analysis of Full and Half Mode Substrate Integrated Waveguide Planar Leaky Wave Antenna with Continuous Beam Scanning in X-Ku Band
- A Multi-Thresholding Method Based on Otsu’s Algorithm for the Detection of Concealed Threats in Passive Millimeter-Wave Images
- Investigation of Nanomaterial Dipoles for SAR Reduction in Human Head
- A Balanced Dual-Band BPF Based on C-CSRR with Improved Passband Selectivity
- Two- and Four-Pole Multilayer SIW Filter with High Selectivity and Higher-Order Mode Suppression
- Microstrip Lowpass Filter with Ultra-Wide Stopband Using Folded Structures