Super-resolution reconstruction of terahertz images

Yue Li*, Li Li, Andrew Hellicar, Y. Jay Guo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

12 Citations (Scopus)

Abstract

A prototype of terahertz imaging system has been built in CSIRO. This imager uses a backward wave oscillator as the source and a Schottky diode as the detector. It has a bandwidth of 500-700 GHz and a source power 10 mW. The resolution at 610 GHz is about 0.85 mm. Even though this imaging system is a coherent system, only the signal power is measured at the detector and the phase information of the detected wave is lost. Some initial images of tree leaves, chocolate bars and pinholes have been acquired with this system. In this paper, we report experimental results of an attempt to improve the resolution of this imaging system beyond the limitation of diffraction (super-resolution). Due to the lack of phase information needed for applying any coherent super-resolution algorithms, the performance of the incoherent Richardson-Lucy super-resolution algorithm has been evaluated. Experimental results have demonstrated that the Richardson-Lucy algorithm can significantly improve the resolution of these images in some sample areas and produce some artifacts in other areas. These experimental results are analyzed and discussed.

Original languageEnglish
Title of host publicationTerahertz for military and security applications VI
EditorsJames O. Jensen, Hong-Liang Cui, Dwight L. Woolard, R. Jennifer Hwu
Place of PublicationBellingham, Washington
PublisherSPIE
Pages69490J-1-69490J-9
Number of pages9
ISBN (Print)9780819471406
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventTerahertz for Military and Security Applications VI - Orlando, FL, United States
Duration: 18 Mar 200819 Mar 2008

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume6949
ISSN (Print)0277-786X

Other

OtherTerahertz for Military and Security Applications VI
CountryUnited States
CityOrlando, FL
Period18/03/0819/03/08

Keywords

  • Richardson-Lucy algorithm
  • Super resolution
  • Terahertz imaging

Fingerprint Dive into the research topics of 'Super-resolution reconstruction of terahertz images'. Together they form a unique fingerprint.

Cite this