Method and system for generating contone encoded binary print data streams
AssigneeXerox Corporation
InventorsFrancis Kapo Tse, Ramesh Nagarajan, James P. Russell
Life of this patent
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Abstract
A method and system to convert an electronic image file described in a page description language containing both contone and non-contone image objects to an intermediate binary format image. The intermediate format image separately encodes the contone and non-contone image objects. The contone image objects are edge-tagged. Prior to printing, the intermediate binary format page image is separated into the contone and non-contone image objects. The contone image objects are converted back to a contone form using the edge tagging to modify the filter weights of a digital filter. The non-contone image objects are converted to contone form by means of a pattern matching scheme.
Claims14
A method of processing images in a digital printer, comprising:
- (a) receiving an electronic image file, the electronic image file including at least one object representing a contone image and at least one object representing a non-contone image;
- (b) processing the contone image object to generate an edge tagged encoded binary image data stream;
- (c) processing the non-contone image object to generate an encoded binary data stream;
- (d) applying a first binary to contone conversion process to the encoded binary data stream to generate a first contone image stream;
- and
- (e) applying a second binary to contone conversion process to the edge tagged encoded binary image data stream to generate a second contone image stream;
- and
- (f) combining the first contone image stream and the second contone image stream to form a single contone page image stream for rendering by a digital printer.
A system for processing an electronic image file in a digital printer, the electronic image file including at least one object representing a contone image and at least one object representing a non-contone image, comprising:
- a processor to process the contone image object to generate an edge tagged encoded binary image data stream and to process the non-contone image object to generate an encoded binary data stream;
- said processor applying a first binary to contone conversion process to the encoded binary data stream to generate a first contone image stream and applying a second binary to contone conversion process to the edge tagged encoded binary image data stream to generate a second contone image stream;
- said processor combining the first contone image stream and the second contone image stream to form a single contone page image stream for rendering by a digital printer.
Dependencies are inferred from the claim text.