Effect of filter arrangement in the estimation accuracy of an imaging spectrometer

Authors

Wilma R. Oblefias ⋅ PH National Institute of Physics, University of the Philippines Diliman
Maricor N. Soriano ⋅ PH National Institute of Physics, University of the Philippines Diliman
Caesar A. Saloma ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We investigate the reason why increasing the number of basis spectra in a spectral imaging device does not always improve the estimation merit. A particular filter is not the cause of this observation but the components of the inverse of the transformation matrix which maps the coefficient of the basis spectra to the color of the sample. We found out that the large magnitude of the components of the inverse of the transformation matrix results to error in the calculation of the coefficients. This error leads to a drop in the spectral estimation merit even when the number of basis spectra is increased. Therefore, it is not enough that the filter used in an imaging spectrometer must not be a linear multiple of other filters and non-zero to any of the wavelengths in the range of interest. Filters must also be arranged in a sequence such that the inverse of the transformation matrix will have components with small magnitude.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2004-2C-01

Section

Image and Signal Processing

Published

2004-10-25

How to Cite

[1]

WR Oblefias, MN Soriano, and CA Saloma, Effect of filter arrangement in the estimation accuracy of an imaging spectrometer, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-2C-01 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-2C-01.