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Proceedings Paper

Fringe removal for continuous-wave terahertz imaging based on cartoon-texture decomposition
Author(s): Lingbo Qiao; Yingxin Wang; Ziran Zhao; Zhiqiang Chen
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Paper Abstract

Continuous-wave (CW) terahertz (THz) imaging system has advantages of high power, compact structure and low cost, thus having been investigated for widespread applications. In typical reflection mode of CW imaging, the obtained image is usually degraded by repeated fringes, which is caused by interference phenomenon. The undesired interference signal originates from the reflection of surfaces of samples and lenses. When the samples are titled placed or their surfaces are uneven, the detected signal intensity is fluctuant even if the same sample lies in different positions. Therefore, small-sized or weekly absorbing objects are hard to be distinguished. Based on cartoon-texture decomposition, we propose a practical method to restore CW THz reflection images. After decomposition, the fringes and the objects are separated. In order to preserve edges, sharpening and fusion steps are employed respectively. The object in the final image is obvious with little loss of information.

Paper Details

Date Published: 23 August 2013
PDF: 7 pages
Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090P (23 August 2013); doi: 10.1117/12.2033629
Show Author Affiliations
Lingbo Qiao, Tsinghua Univ. (China)
Yingxin Wang, Tsinghua Univ. (China)
Ziran Zhao, Tsinghua Univ. (China)
Zhiqiang Chen, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 8909:
International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications
Marco Rahm; Konstantin Vodopyanov; Wei Shi; Cunlin Zhang, Editor(s)

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