	US 7,589,847 B2
	Apparatus and method for conversion from portable document format
Jason Jurkowski, Milwaukee, Wis. (US); and Simon Barnett, Rochester, N.Y. (US)
Assigned to Xerox Corporation, Norwalk, Conn. (US)
Filed on Jul. 20, 2005, as Appl. No. 11/185,130.
Prior Publication US 2007/0019221 A1, Jan. 25, 2007
Int. Cl. G06F 3/12 (2006.01)

U.S. Cl. 358—1.13 [358/1.14; 358/1.15]

16 Claims

1. A method of a document processing system comprising:

identifying at least one image in a PDF file;

prioritizing the identified image with respect to an aspect of the identified image;

comparing the aspect of the identified image to a threshold of criteria;

converting the PDF file into a postscript data stream;

locating a first encounter of the identified image in the postscript data stream;

associating a reference with the first encountered image in a postscript data stream main file;

creating a memory for each first encountered image including information necessary for recreating such image;

locating a reoccurrence of the identified image in the postscript data stream;

segregating the recurring image from the postscript data stream if the threshold of criteria is not met;

storing the segregated image separately from a remainder of the postscript data stream;

and

inserting the associated reference into the postscript data stream in place of the separately stored image.