|Title||Video rate spectral imaging using a coded aperture snapshot spectral imager.|
|Publication Type||Journal Article|
|Year of Publication||2009|
|Authors||AA Wagadarikar, NP Pitsianis, X Sun, and DJ Brady|
|Pagination||6368 - 6388|
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.
|Short Title||Optics Express|