Digital Camera Filter Design for Colorimetric and Spectral Accuracy

Abstract

A filter optimization was investigated to design a set of filters for a five channel multi-spectral camera, three of which result in high colorimetric performance when used alone, and the full set having high quality spectral performance. Each candidate filter was selected from a set of 33 glass filters with three different thicknesses where filters may be combined in optical series. The effectiveness of the filter selection is demonstrated by computer simulation taking into account the spectral sensitivity of the imaging system, and a comprehensive database of natural and man-made object spectral reflectances.