Expectation maximisation algorithms for terahertz transmission tomography
Language
en
Communication dans un congrès avec actes
This item was published in
Proceedings of SPIE, the International Society for Optical Engineering, Terahertz Emitters, Receivers, and Applications V, SPIE Optics, Photonics, Optical Engineering, Applications, 2014-08-17, San Diego, California. 2014-09-05, vol. 9199, p. 91990O (1-8)
SPIE, The International Society for Optical Engineering
English Abstract
Terahertz (THz) tomography is a recently developed imaging technique allowing 3D inspection of opaque objects. In this paper, we develop an ordered subsets convex algorithm for THz transmission tomography (THz-OSC). Since ...Read more >
Terahertz (THz) tomography is a recently developed imaging technique allowing 3D inspection of opaque objects. In this paper, we develop an ordered subsets convex algorithm for THz transmission tomography (THz-OSC). Since the reconstruction quality is highly depending on the THz beam energy, we investigate afterwards a multienergy version of the algorithm in order to provide a more accurate reconstruction of the acquired sample. This multi-energy approach is validated by reconstructing data from tomographic acquisitions measured with a 84/287 GHz transmission scanner. Then we discuss how this dual-energy approach could be able to extract physical properties of acquired samples in addition to improving 3D reconstruction.Read less <
English Keywords
Expectation maximization algorithms
Tomography
Terahertz radiation
3D modeling
Inspection
Opacity
Scanners
Origin
Hal imported