Götz Kluge's photos with the keyword: retinex filterning

Dithered B&W version for printing: Width: 101.6 mm (2400 pixels), Height: 127 mm (3000 pixels), Resolution: 23.6220 pixels/mm (600 pixels/in). [main image]: John Martin: The Bard (ca. 1817) , by GIMP: contrast enhanced in the rock area & light areas delated & color removed & Retinex filtering [inset]: Henry Holiday: Illustration (1876) to chapter The Beaver's Lesson in Lewis Carroll's The Hunting of the Snark , detail I also copied this to commons.wikimedia.org/wiki/File:The_Bellman_and_the_Bard.png .