Conversion of Black-and-White Photography to Four-Color Lithography.
Abstract
The purpose of this study was to determine the feasibility of a new technique, colorization, for converting black-and-white photography to naturalistic color for orthophotographics. The cartographic reproduction process is based on a simulated color separation of the black-and-white imagery into the four components required for process printing, i.e., yellow, magenta, cyan, and black. This initial test was confined to a 7 1/2-by 11-inch black-and-white aerial photo from which four positive separations were colorized. Minimal indicia were added by hand. Thus, in combination, a pictorially naturalistic graphic, with minimal cartographic treatment, was rendered in full color for visual inspection. An equivalent full color proof on an opaque white substrate was produced from subsequent negatives in conjunction with a dropout roads mask. The technique appears to offer the combined advantages of black-and-white photography for contrast and color imagery for interpretation, while surpassing both additive color systems and complex subtractive methods in economic prudence. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1976
- Accession Number
- ADA033610
Entities
People
- Hale M. Luig