Prognosticon

A technical calibration target used for digitizing manuscripts. The top section is a color checker chart consisting of a grid of 24 colored squares. The bottom section is a resolution and focus test chart, featuring horizontal and vertical line patterns, a 30-degree slanted edge, a grayscale gradient strip, and four circular starburst patterns. The chart includes the text "BSB Bavarian State Library" and "© 2007 digitalfoto-trainer.de".