Color-balance and Exposure Controls for Aerial Color-Infrared Film

Abstract

A method of determining which aerial camera filter combination and which shutter and aperture settings to use to produce the required color-balance and exposure on aerial color infrared film is described.
The method is divided into three steps. The first step is the selection of an optimum image from a set of existing images. The second step is the estimation and the quantification of differences between the conditions under which the optimum image is produced and the conditions under which the aerial CIR photos are taken. The third step is the selection of a filter combination, shutter speed and F-no, to compensate for the differences.
To simplify the procedure, the required data can be read out from a group of figures and tables.
That the control method was able to produce the required image was verified by several practical tests.