Side information in coded aperture compressive spectral imaging

Laura Galvis, Henry Arguello, Daniel Lau, Gonzalo R. Arce

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


Coded aperture compressive spectral imagers sense a three-dimensional cube by using two-dimensional projections of the coded and spectrally dispersed source. These imagers systems often rely on FPA detectors, SLMs, micromirror devices (DMDs), and dispersive elements. The use of the DMDs to implement the coded apertures facilitates the capture of multiple projections, each admitting a different coded aperture pattern. The DMD allows not only to collect the sufficient number of measurements for spectrally rich scenes or very detailed spatial scenes but to design the spatial structure of the coded apertures to maximize the information content on the compressive measurements. Although sparsity is the only signal characteristic usually assumed for reconstruction in compressing sensing, other forms of prior information such as side information have been included as a way to improve the quality of the reconstructions. This paper presents the coded aperture design in a compressive spectral imager with side information in the form of RGB images of the scene. The use of RGB images as side information of the compressive sensing architecture has two main advantages: The RGB is not only used to improve the reconstruction quality but to optimally design the coded apertures for the sensing process. The coded aperture design is based on the RGB scene and thus the coded aperture structure exploits key features such as scene edges. Real reconstructions of noisy compressed measurements demonstrate the benefit of the designed coded apertures in addition to the improvement in the reconstruction quality obtained by the use of side information.

Original languageEnglish
Title of host publicationEmerging Digital Micromirror Device Based Systems and Applications IX
EditorsMichael R. Douglass, Benjamin L. Lee
ISBN (Electronic)9781510606753
StatePublished - 2017
EventEmerging Digital Micromirror Device Based Systems and Applications IX - San Francisco, United States
Duration: Jan 30 2017Jan 31 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceEmerging Digital Micromirror Device Based Systems and Applications IX
Country/TerritoryUnited States
CitySan Francisco

Bibliographical note

Publisher Copyright:
© 2017 SPIE.


  • Coded aperture design
  • Compressive sensing
  • Side Information

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Side information in coded aperture compressive spectral imaging'. Together they form a unique fingerprint.

Cite this