A fast spatial-domain terahertz imaging using block-based compressed sensing

Byung Min Hwang, Sang Hun Lee, Woo Taek Lim, Chang Beom Ahn, Joo Hiuk Son, Hochong Park

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


A fast imaging method for a spatial-domain terahertz imaging system based on compressed sensing is proposed. Observing that the correlation between image pixels is localized, the image reconstruction in compressed sensing is performed on a block basis, resulting in a reduced computational load with no degradation in image quality. By applying the proposed method to a conventional spatial-domain terahertz imaging system, it was verified that a 128 × 128 image reconstructed using 30% measurements has the equivalent quality to that done using full measurements. The proposed method requires no additional hardware, and provides a general solution to fast spatial-domain terahertz imaging.

Original languageEnglish
Pages (from-to)1328-1336
Number of pages9
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Issue number11
StatePublished - Nov 2011


  • Block reconstruction
  • Compressed sensing
  • Fast imaging
  • T-ray imaging


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