Research Papers: Imaging

Principal wavelengths in the formation of spectral images of natural scenes

[+] Author Affiliations
Francisco J. Sanchez-Marin

Centro de Investigaciones en Optica, Loma del Bosque 115, Lomas del Campestre, Leon, Gto., Mexico 37150

J. Biomed. Opt. 18(4), 046005 (Apr 02, 2013). doi:10.1117/1.JBO.18.4.046005
History: Received June 26, 2012; Revised February 25, 2013; Accepted March 14, 2013
Text Size: A A A

Abstract.  Considering the high degree of correlation in the visible spectrum, the principal wavelengths from spectral measurements of radiance recorded in spectral images were selected using a method based on principal components analysis (PCA). It seems to be that this is the first time that, instead of using spectra, data is taken directly from the “slices” of spectral images; the method has the advantage of preserving the structure of the original data in the reduced data set. A “true” dimensionality of five wavelengths resulted for all the analyzed images. The averages of the selected wavelengths for 10 spectral images produced good results for a human observer. These results were possible using only four wavelengths. Though PCA by itself is not able to include the impact of specific sensors on the selection of basis functions, results suggest that the variable selection method used in this work (which is not just PCA) yielded objective information of the structure of the physical stimuli (i.e., the spectral structures) that have been shaping the visual systems of animals and insects since many years ago.

Figures in this Article
© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Francisco J. Sanchez-Marin
"Principal wavelengths in the formation of spectral images of natural scenes", J. Biomed. Opt. 18(4), 046005 (Apr 02, 2013). ; http://dx.doi.org/10.1117/1.JBO.18.4.046005


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


 

  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.