title: Dual-camera design for coded aperture snapshot spectral imaging.
abstract: Coded aperture snapshot spectral imaging (CASSI) provides an efficient mechanism for recovering 3D spectral data from a single 2D measurement. However, since the reconstruction problem is severely underdetermined, the quality of recovered spectral data is usually limited. In this paper we propose a novel dual-camera design to improve the performance of CASSI while maintaining its snapshot advantage. Specifically, a beam splitter is placed in front of the objective lens of CASSI, which allows the same scene to be simultaneously captured by a grayscale camera. This uncoded grayscale measurement, in conjunction with the coded CASSI measurement, greatly eases the reconstruction problem and yields high-quality 3D spectral data. Both simulation and experimental results demonstrate the effectiveness of the proposed method.
authors.forename: Lizhi
authors.initials: L
authors.lastname: Wang
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Xiong
authors.forename: Dahua
authors.initials: D
authors.lastname: Gao
authors.forename: Guangming
authors.initials: G
authors.lastname: Shi
authors.forename: Feng
authors.initials: F
authors.lastname: Wu