Chirp Z transform based enhanced frequency resolution for depth resolvable non stationary thermal wave imaging.
This paper proposes a novel post processing modality to enhance depth resolution in frequency modulated thermal wave imaging using chirp Z transform. It explores the spectral zooming feature of the proposed modality to enhance depth resolution and validates it through the experimentation carried over a carbon fiber reinforced plastic and mild steel specimens. Further, defect detection capability of the proposed modality has been compared with that of the other contemporary modalities by taking the defect signal to noise ratio into consideration.
Infrared Imaging Center, K L University, Guntur, India.
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Suresh
Infrared Imaging Center, K L University, Guntur, India.
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S
Subhani
Infrared Imaging Center, K L University, Guntur, India.
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Vijayalakshmi
Infrared Imaging Center, K L University, Guntur, India.
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Vardhan
Infrared Imaging Center, K L University, Guntur, India.
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0000000349383893
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Ghali