Spatial super-resolution in coded aperturebased optical compressive hyperspectral imaging systems

Authors

  • Henry Arguello-Fuentes Universidad Industrial de Santander
  • Hoover Fabian Rueda-Chacón Universidad Industrial de Santander

Keywords:

Super-resolution, hyper-spectral imaging, compressive sensing, optical imaging, CASSI, multi-shot, coded aperture-based systems

Abstract


The Coded Aperture Snapshot Spectral Imaging system (CASSI) is a remarkable optical imaging architecture, which senses the spectral information of a three dimensional scene by using two-dimensional coded focal plane array (FPA) projections. The projections in CASSI are localized such that each measurement contains spectral information only from a specific spatial region of the data cube. Spatial resolution in CASSI is highly dependent on the resolution the FPA detector exhibits; hence, high-resolution images require high-resolution detectors that demand high costs. To overcome this problem, in this paper is proposed an optical model for spatial superresolution imaging called SR-CASSI. Spatial super-resolution is attained as an inverse problem from a set of low-resolution coded measurements by using a compressive sensing (CS) reconstruction algorithm. This model allows the reconstruction of spatially super-resolved hyper-spectral data cubes, where the spatial resolution is significantly enhanced. Simulation results show an improvement of up to 8 dB in PSNR when the proposed model is used.

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Published

2013-08-16

How to Cite

Arguello-Fuentes, H., & Rueda-Chacón, H. F. (2013). Spatial super-resolution in coded aperturebased optical compressive hyperspectral imaging systems. Revista Facultad De Ingeniería Universidad De Antioquia, (67), 7–18. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/16306