Abstract

A technique is described that uses black and white and color photography to study visual range, and the effects of clouds and haze on a scene. Black and white film is used for quantitative measurement of visual range. Film density measurements are digitized using a flying spot scanner to assure that the measurement, analysis and interpretation are reproducible and accurate. The density wedges and the negatives are digitized. The procedure and an example are presented. Color film is used to qualify the black and white measurements. The techniques applied in analysis and some results of the field measurement program are presented.

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