Fringe removal for continuous-wave terahertz imaging based on cartoon-texture decomposition

Lingbo Qiao; Yingxin Wang; Ziran Zhao; Zhiqiang Chen

doi:10.1117/12.2033629

23 August 2013 Fringe removal for continuous-wave terahertz imaging based on cartoon-texture decomposition

Lingbo Qiao, Yingxin Wang, Ziran Zhao, Zhiqiang Chen

Proceedings Volume 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications; 89090P (2013) https://doi.org/10.1117/12.2033629
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

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.

Citation Download Citation

Lingbo Qiao, Yingxin Wang, Ziran Zhao, and Zhiqiang Chen "Fringe removal for continuous-wave terahertz imaging based on cartoon-texture decomposition", Proc. SPIE 8909, International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications, 89090P (23 August 2013); https://doi.org/10.1117/12.2033629

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