A contrast-based resolution enhancing technology (RET) determines a distribution of contrast values for edge fragments in a design layout or portion thereof. Resolution enhancement is applied to the edge fragments in a way that increases the number of edge fragments having a contrast value that exceeds...http://www.google.co.uk/patents/US7293249?utm_source=gb-gplus-sharePatent US7293249 - Contrast based resolution enhancement for photolithographic processing
