The restoration of CW THz images based on phase analysis

Qian Song; Fei Yu; Yuejin Zhao; Cunlin Zhang; Qian Yu; Ming Liu; Xiaohua Liu

doi:10.1117/12.825306

3 September 2009 The restoration of CW THz images based on phase analysis

Qian Song, Fei Yu, Yuejin Zhao, Cunlin Zhang, Qian Yu, Ming Liu, Xiaohua Liu

Proceedings Volume 7443, Applications of Digital Image Processing XXXII; 74432G (2009) https://doi.org/10.1117/12.825306
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The method about how to distinguish the object from the standing wave, eliminate the wave patterns in CW THz images based on phase analysis is reported. The standing wave of CW THz images result from the interference of the wave-front reflected from the object and other optics in the system. Therefore, the information of the surface of the object and the background is included in the interference pattern of the images. Because the objects have different Phase Gradients from the background, they could be extracted from the image by utilizing the phase information of the interferential waves. The waves of the image can be removed with Election-pass filter, and the result of the filtering would not deteriorate the result because there is no object in the image. At last, the image of object and the image without standing wave can be fused together to make the image better for eyes. The scope of CW THz imaging's application can be extended and the quality of images can be improved by applying this approach.

Citation Download Citation

Qian Song, Fei Yu, Yuejin Zhao, Cunlin Zhang, Qian Yu, Ming Liu, and Xiaohua Liu "The restoration of CW THz images based on phase analysis", Proc. SPIE 7443, Applications of Digital Image Processing XXXII, 74432G (3 September 2009); https://doi.org/10.1117/12.825306

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