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Joint segmentation and reconstruction of hyperspectral data with compressed measurements |
Applied Optics, Vol. 50, Issue 22, pp. 4417-4435 (2011)
http://dx.doi.org/10.1364/AO.50.004417
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Abstract
This work describes numerical methods for the joint reconstruction and segmentation of spectral images taken by compressive sensing coded aperture snapshot spectral imagers (CASSI). In a snapshot, a CASSI captures a two-dimensional (2D) array of measurements that is an encoded representation of both spectral information and 2D spatial information of a scene, resulting in significant savings in acquisition time and data storage. The reconstruction process decodes the 2D measurements to render a three- dimensional spatio-spectral estimate of the scene and is therefore an indispensable component of the spectral imager. In this study, we seek a particular form of the compressed sensing solution that as sumes spectrally homogeneous segments in the two spatial dimensions, and greatly reduces the number of unknowns, often turning the underdetermined reconstruction problem into one that is over determined. Numerical tests are reported on both simulated and real data representing compressed measurements.
© 2011 Optical Society of America
OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(110.4234) Imaging systems : Multispectral and hyperspectral imaging
(110.3010) Imaging systems : Image reconstruction techniques
ToC Category:
Image Processing
History
Original Manuscript: April 19, 2011
Revised Manuscript: July 8, 2011
Manuscript Accepted: July 10, 2011
Published: July 27, 2011
Citation
Qiang Zhang, Robert Plemmons, David Kittle, David Brady, and Sudhakar Prasad, "Joint segmentation and reconstruction of hyperspectral data with compressed measurements," Appl. Opt. 50, 4417-4435 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-22-4417
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