Proseuticum for Frederick III for the Apollonian Laurel

A technical calibration target is used for digitizing the manuscript. The image includes a color checker chart consisting of a grid of twenty-four colored squares at the top, and a resolution test chart featuring Siemens stars, line pairs, and grayscale steps at the bottom. It is labeled with "BSB Bayerische StaatsBibliothek" and "© 2007 digitalfoto-trainer.de".