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

TitleVideo rate spectral imaging using a coded aperture snapshot spectral imager.
Publication TypeJournal Article
Year of Publication2009
AuthorsAA Wagadarikar, NP Pitsianis, X Sun, and DJ Brady
JournalOptics Express
Volume17
Start Page6368
Issue8
Pagination6368 - 6388
Date Published04/2009
Abstract

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.

DOI10.1364/oe.17.006368
Short TitleOptics Express