George E Eldridge

US Patent:

6977741, Dec 20, 2005

Filed:

Dec 21, 2000

Appl. No.:

09/745925

Inventors:

George L. Eldridge - Long Beach CA, US
Mark A. Smith - Rochester NY, US
San A. Phong - Cerritos CA, US
Farzin Blurfrushan - Redondo Beach CA, US
Hilda Gharabegian - Rancho Palos Verdes CA, US
Peter A. Crean - Penfield NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G06F015/00
B41J002/435

US Classification:

358 115, 347247, 715517

Abstract:

Shifting a page image while it is still in compressed form. The page image is compressed into independent strips that are a full page in the fast scan direction, and a small number of scanlines in the slow scan direction. Then, to shift the page image, whole strips can be deleted in one margin and/or deleted from the other. If the number of scanlines per strip is small enough, the difference in a margin created by the change of one strip will not be apparent. This invention can be used to advantage when it is decided at print time that the output shall be in the form of a saddle-stitched booklet requiring two-up printing, folding and subsequent trimming of the outside edges to uniform alignment. Here, a progressive page shift can be introduced at the printer controller while the images are still compressed, instead of requiring the change to be done to the PostScript Master, which would require reRIPing or decompression, shift and recompression.

US Patent:

7123174, Oct 17, 2006

Filed:

Jun 29, 2005

Appl. No.:

11/172245

Inventors:

George L. Eldridge - Long Beach CA, US
Bill P. Gunther - Simi Valley CA, US
San A. Phong - La Mirada CA, US
Son Ngoc Nguyen - Irvine CA, US
Farzin Blurfrushan - Torrance CA, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

H03M 7/46

US Classification:

341 63, 382233, 341 50, 341 51

Abstract:

A compressor can compress an image by reducing the amount of data while preserving the information. Some compressors use run length coding wherein image data is converted into a series of run length code words. The efficiency of run length coding can be increased with the introduction of differential run length code words. The differential run length code words can augment the original set of run length codes. Differential run length codes vary from current run length codes by encoding runs of differences.

US Patent:

7349135, Mar 25, 2008

Filed:

Oct 25, 2002

Appl. No.:

10/281422

Inventors:

George L. Eldridge - Long Beach CA, US
Munir G. Salfity - Torrance CA, US
John Cheng Ming Tou - Rancho Palos Verdes CA, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

H04N 1/36
H04N 1/64
H04N 1/411
G06F 3/12
G06K 15/02

US Classification:

358515, 358 115, 358 116, 358539, 35842601, 358425

Abstract:

A circuit which uses a compressor to divide each separation image into 8-line strips, and to independently compress each strip, a single decompressor to decompress two or more color image separations, strip by strip, by interleaving them, and to apply them to two or more print heads, one for each color separation. DMA from a main memory is used to apply both separations to the decompressor, and the decompressor output is demultiplexed into two print heads, one for each separation. This is done to drive each color separation simultaneously in a single-pass color printer. Multiplexing logic controls the DMA into the decompressor and the output of the decompressor into separate buffers for each color separation. Additional logic uses the page and line sync from each print head to synchronize the accessing of the correct image raster from buffers at the output of the decompressor to the associated print head.

US Patent:

7414757, Aug 19, 2008

Filed:

Sep 30, 2003

Appl. No.:

10/674837

Inventors:

George L. Eldridge - Long Beach CA, US
Peter A. Crean - Penfield NY, US
Jon S. McElvain - Redondo Beach CA, US
William E. Nelson - Penfield NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

H04N 1/41
H04N 1/413
H04N 1/403
H04N 1/407
H04N 1/409
H04N 1/405
G05B 13/00
G06T 1/60
G06K 15/02

US Classification:

35842613, 35842601, 358 115, 358 116, 358444, 358 315, 358 21, 358 19

Abstract:

There is disclosed in embodiments methods relating to the compression of printing hints. The method in embodiments generates a first set of image pixels having corresponding printing hints. The printing hints are then adjusted to produce a second set of image pixels processed in such a way that an end printed result is visually equivalent to a printed result using the first set of image pixels thereby reducing the entropy in the printing hints. The method improves the compression ratio of an image using printing hints by adjusting the printing hints of pixels that are zero or fully saturated. The printing hints are adjusted in such a way to reduce the complexity of the printing hints.

US Patent:

7880912, Feb 1, 2011

Filed:

Dec 7, 2005

Appl. No.:

11/296014

Inventors:

George L. Eldridge - Long Beach CA, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G06F 3/12
G03G 21/02

US Classification:

358 115, 399 79

Abstract:

A network printing system is provided having a plurality of network printers, a plurality of computer terminals, and at least one processor in operative communication with the plurality of printers and the plurality of computer terminals. The at least one processor executes application software for receiving a print data request having a print job from at least one of the plurality of computer terminals. The at least one processor includes an automated selection service module for analyzing printer-related data corresponding to each of the plurality of printers, selecting at least one of the plurality of printers in accordance with the analysis and transmitting the print data request to the at least one selected destination printer. The at least one processor further includes a printer notification module for generating and transmitting a notification message to a user specifying the at least one selected destination printer.

US Patent:

7911634, Mar 22, 2011

Filed:

Jul 28, 2005

Appl. No.:

11/191077

Inventors:

George L. Eldridge - Long Beach CA, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G06F 3/12
G06K 15/00
H04N 1/46
G03F 3/08

US Classification:

358 115, 358 116, 358504, 358515, 358518, 358524

Abstract:

An embodiment of the invention generally relates to a method for providing printing services. A database is configured to store data related to a plurality of print engines. The data includes static and time-varying characteristics for each of the print engines of the plurality of print engines. A first print engine is selected from the plurality of print engines. A print job is initiated for the first print engine. The print job is processed at a remote printing service based on data related to the first print engine to create a first print engine print file. The first print engine file is provided to the first print engine.

US Patent:

7965406, Jun 21, 2011

Filed:

Jan 24, 2008

Appl. No.:

12/010388

Inventors:

George L. Eldridge - Long Beach CA, US
Munir G. Salfity - Torrance CA, US
John Cheng Ming {acute over (T)}ou - Rancho Palos Verdes CA, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G06F 3/12
H04N 1/46

US Classification:

358 115, 358515

Abstract:

A circuit which uses a compressor to divide each separation image into 8-line strips, and to independently compress each strip, a single decompressor to decompress two or more color image separations, strip by strip, by interleaving them, and to apply them to two or more print heads, one for each color separation. DMA from a main memory is used to apply both separations to the decompressor, and the decompressor output is demultiplexed into two print heads, one for each separation. This is done to drive each color separation simultaneously in a single-pass color printer. Multiplexing logic controls the DMA into the decompressor and the output of the decompressor into separate buffers for each color separation. Additional logic uses the page and line sync from each print head to synchronize the accessing of the correct image raster from buffers at the output of the decompressor to the associated print head.

US Patent:

20080218789, Sep 11, 2008

Filed:

Mar 6, 2007

Appl. No.:

11/714652

Inventors:

George L. Eldridge - Long Beach CA, US

International Classification:

G06K 15/00

US Classification:

358 115

Abstract:

A document to be printed digitally has each page image routed to an RIP of least capability able to timely process the image if that RIP is least busy. If the RIP of least capability able to timely process the image is not the least busy, the page image is routed to the RIP of next greater capability. Page images including colored material are routed to the RIP of greater capability and to a color printer. Page images including graphical material or larger than letter size are routed to an RIP of greater capability. Page images containing no colored material are sent to a monochrome printer, if available; and, if not, are sent to a color printer.