Video rate spectral imaging using a coded aperture snapshot spectral imager.

Published

Journal Article

We have previously reported on coded aperture snapshot spectral imagers (CASSI) that can capture a full frame spectral image in a snapshot. Here we describe the use of CASSI for spectral imaging of a dynamic scene at video rate. We describe significant advances in the design of the optical system, system calibration procedures and reconstruction method. The new optical system uses a double Amici prism to achieve an in-line, direct view configuration, resulting in a substantial improvement in image quality. We describe NeAREst, an algorithm for estimating the instantaneous three-dimensional spatio-spectral data cube from CASSI's two-dimensional array of encoded and compressed measurements. We utilize CASSI's snapshot ability to demonstrate a spectral image video of multi-colored candles with live flames captured at 30 frames per second.

Full Text

Duke Authors

Cited Authors

  • Wagadarikar, AA; Pitsianis, NP; Sun, X; Brady, DJ

Published Date

  • April 2009

Published In

Volume / Issue

  • 17 / 8

Start / End Page

  • 6368 - 6388

PubMed ID

  • 19365462

Pubmed Central ID

  • 19365462

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.17.006368

Language

  • eng