High Speed Terahertz Pulse Imaging in the Reflection Geometry and Image Quality Enhancement by Digital Image Processing |
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Authors: | Chae-Hwa Shon Won-Yong Chong Seok-Gy Jeon Geun-Ju Kim Jung-Il Kim and Yun-Sik Jin |
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Institution: | (1) Terahertz Wave Research Laboratory, Korea Electrotechnology Research Institute (KERI), 28-1 Sungju-dong, Changwon, Gyeongnam, South Korea, 641-120;(2) Information and Communication Department, Kyungnam University, 449 Wolyong-dong, Masan, Gyeongnam, South Korea, 631-701 |
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Abstract: | We describe the formation and enhancement of two dimensional pulsed terahertz (THz) images obtained in the reflection geometry
with a high-speed optical delay line. Two test objects are imaged and analyzed with respect to material information and concealed
structure. Clear THz images were obtained with various imaging modes and were compared with the X-ray images. The THz image
of a sample revealed material features that the X-ray image cannot distinguish. We could enhance the THz image quality using
various image processing techniques, such as edge detection, de-noising, high-pass filtering, and wavelet filtering. |
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Keywords: | Terahertz Terahertz pulse imaging (TPI) High-speed optical delay line Digital image processing |
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