Publications [#280341] of David J. Brady
- Wagadarikar, AA; Pitsianis, NP; Sun, X; Brady, DJ, Video rate spectral imaging using a coded aperture snapshot spectral imager.,
Optics Express, vol. 17 no. 8
pp. 6368-6388 , [doi]
(last updated on 2019/11/11)
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.