Page parallel PDF flattening
AssigneeXerox Corporation
InventorsLee Coy Moore, Edward Chapman
Life of this patent
Estimating the term…
Abstract
Systems and methods are described that facilitate parallel processing of PDF documents for printing, wherein the PDF documents comprise transparency effects. Transparent objects in the PDF document are identified, and the document is divided into subgroups of pages. The transparency objects are then flattened to enable conversion to PostScript format. The PostScript pages are processed and rendered to raster for printing.
Claims19
A method for flattening transparent objects during page parallel processing of a PDF document, comprising:
- receiving a PDF document;
- identifying transparent objects in pages of the PDF document;
- chunking pages of a received PDF document into subgroups as a function of identified transparent objects on respective pages;
- converting in parallel each subgroup of PDF pages to PostScript format;
- converting Postscript pages into imaging primitives;
- in parallel, rendering subgroups of imaging primitives to raster;
- and
- distributing subgroups having at least one identified transparent object to at least one processor or thread having a higher performance than at least one other processor or thread used to process at least one subgroup that does not have a transparent object.
A system that facilitates flattening transparent objects during page parallel processing of a PDF document, comprising:
- one or more processors configured to:
- receive a PDF document;
- identify transparent objects in pages of the PDF document;
- chunk pages of a received PDF document into subgroups as a function of identified transparent objects on respective pages;
- convert in parallel each subgroup of PDF pages to PostScript format;
- convert Postscript pages into imaging primitives;
- in parallel, render subgroups of imaging primitives to raster;
- and
- distribute subgroups having at least one identified transparent object to at least one processor or thread having a higher performance than at least one other processor or thread used to process at least one subgroup that does not have a transparent object.
One or more processors configured execute computer-readable instructions for flattening transparent objects during page parallel processing of a PDF document, the one or more processors being configured to:
- receive a PDF document;
- determining whether transparent objects are present in the received PDF document;
- chunk pages of a received PDF document into subgroups as a function of identified transparent objects on respective pages;
- convert in parallel each subgroup of PDF pages to PostScript format;
- convert Postscript pages into imaging primitives;
- in parallel, render subgroups of imaging primitives to raster;
- and
- distribute subgroups having at least one identified transparent object to at least one processor or thread having a higher performance than at least one other processor or thread used to process at least one subgroup that does not have a transparent object.
Dependencies are inferred from the claim text.