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Some early color photographic processes based on special color screen filterspose specific challenges in their digitization and digital presentation. Thosechallenges include dynamic range, resolution, and the difficulty of stitchinggeometrically-repeating patterns. We describe a novel method used to digitizethe collection of early color photographs at the National Geographic Societywhich makes use of a custom open-source software tool to analyze and preciselystitch regular color screen processes.

Digital analysis of early color photographs taken using regular color screen processes