A processing system for preparing a plural separation document image for printing, including small feature enhancement of the image, preventing halftoning damage thereto, including detecting small features in the document image; and in a detected small feature region, setting any output image signals...http://www.google.co.uk/patents/US6275304?utm_source=gb-gplus-sharePatent US6275304 - Automated enhancement of print quality based on feature size, shape, orientation, and color
