| US 7,456,996 B2 | ||
| Method of processing print data incorporating obscuration detection between layers | ||
| Paul Lapstun, Balmain (Australia); Simon Robert Walmsley, Balmain (Australia); and Kia Silverbrook, Balmain (Australia) | ||
| Assigned to Silverbrook Research Pty Ltd, Balmain, New South Wales (Australia) | ||
| Filed on Sep. 27, 2007, as Appl. No. 11/863,239. | ||
| Application 10/636279 is a division of application No. 09/436747, filed on Nov. 09, 1999, granted, now 6,687,022. | ||
| Application 11/863239 is a continuation of application No. 11/329041, filed on Jan. 11, 2006, granted, now 7,283,281. | ||
| Application 11/329041 is a continuation of application No. 10/636279, filed on Aug. 08, 2003, granted, now 7,079,286. | ||
| Claims priority of application No. PP7024 (AU), filed on Nov. 09, 1998. | ||
| Prior Publication US 2008/0013118 A1, Jan. 17, 2008 | ||
| Int. Cl. H04N 1/46 (2006.01); G06K 15/00 (2006.01) | ||
| U.S. Cl. 358—1.3 [358/2.1; 358/1.9; 358/529; 358/534] | 9 Claims |
| 1. A method of processing print data, the method comprising the steps of:
maintaining a buffer;
receiving rendered image and graphics objects in a contone layer from a graphics system together with a black layer into the
buffer;
detecting obscuration of black pixels of the black layer by objects placed on the contone layer;
compositing obscured black pixels with the contone layer if interaction between the black pixels and the contone layer is
possible;
converting the contone layer into CMYK specific to a printer; and
compressing and packaging the black layer and the contone layer into a page description to be delivered to the printer.
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