Exposure control method for auto printer

TLDR: In this article, the authors utilize the test result of a color video analyzer by providing a channel where a slope coefficient becomes zero, converting an exposure time and a filter value which are outputted by a color analyzer into the number of key steps, and using this conversion data.

Abstract: PURPOSE:To utilize the test result of a color video analyzer by providing a channel where a slope coefficient becomes zero, converting an exposure time and a filter value which are outputted by a color video analyzer into the number of key steps, and using this conversion data. CONSTITUTION:When the test result of the color video analyzer is utilized, the channel for the analyzer is selected. In this channel, data based upon zero as slope coefficients of respective colors are stored in the channel, so an automatic exposure control function does not operate substantially. The exposure time and filter value which are outputted by the color video analyzer, on the other hand, are converted into the number of steps of a color key 74 and a density key 75 and it is inputted to the auto printer. The auto printer performs exposure control according to a manual correction quantity inputted in the form of the number of steps. Consequently, the test result of the color video analyzer can be utilized.