Relative reflectance data from preprocessed multispectral photography

Abstract

Photographic image tone is an indicator of surface reflectance. If adequately preprocessed, photographic image tone can be used to provide a quantitative measureof relative surface reflectance,essential for many remotesensingapplications. The three preprocessing steps proposed are, first the standardization of the film data to a gamma of 1, second scene to scene ratioing, and third band to band ratioing. This methodology is reviewed and an example of its application provided in the preprocessing of a large multispectral photographic data set.