When a halftone image region that is below a predetermined density is to be reproduced, a processing unit controlling an exposure unit selects an exposure pattern that can represent a record dot diameter within a range based on a predetermined rule from exposure patterns prepared in advance. Accordingly,...http://www.google.fr/patents/US6714225?utm_source=gb-gplus-shareBrevet US6714225 - Image formation apparatus and image formation method
Image formation apparatus and image formation method
