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公开(公告)号：DE3066234D1
公开(公告)日：1984-03-01
申请号：DE3066234
申请日：1980-03-19
Applicant: XEROX CORP
Inventor： CREAN PETER A , SPENCER PAUL R
Abstract: Optical fibers (2, 3 and 4) are used to sense fluid ink drops along the x, y and z axis of an orthogonal coordinate system. A drop sensing zone is defined in the narrow space between the faces of a single input fiber and two output fibers. An LED 58 infrared light source is coupled to a remote end of the input fiber. Infrared sensitive photodiodes 61 are coupled to the remote ends of each output fiber. The photodiodes are in turn coupled to a differential amplifier 69 whose output represents a displacement error for the x and y axis and represents a time reference for the z axis for the case where the drop flight path is along the z axis. A plurality of sensors are disclosed in an ink recording system having a plurality of nozzles 33 and in an ink recording system having an ink generator traversing the length of a high speed rotating drum 100.
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公开(公告)号：CA1146261A
公开(公告)日：1983-05-10
申请号：CA394701
申请日：1982-01-21
Applicant: XEROX CORP
Inventor： CREAN PETER A , LAVALLEE PIERRE A , AGULNEK MARTIN A
IPC: H04N1/04
Abstract: SCANNING APPARATUS A line scanning apparatus employing a multiplicity of linear arrays, the linear extent of which is less than the length of the scan line. To permit an entire line to be covered, the arrays are offset from one another in the direction of scan with adjoining array ends overlapped. To correct for the misalignment and redundancy introduced, the image data from the arrays is buffered until a line is completed when readout, is initiated. during readout, cross over from one array to the next is effected within the overlapped areas and the redundant data discarded.
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公开(公告)号：CA1133570A
公开(公告)日：1982-10-12
申请号：CA338191
申请日：1979-10-23
Applicant: XEROX CORP
Inventor： WARREN W THOMAS , CREAN PETER A
Abstract: TONE ERROR CONTROL FOR IMAGE CONTOUR REMOVAL A system for processing halftone image data in digital format. The image data is electronically screened to provide a binary output suitable for storage or printing, the image data being processed in discrete blocks or cells. The error between actual and printed average gray values of each image cell processed is determined and the electronic screen thresholds are modified in accordance with such error (if any) prior to processing the next image cell. At the beginning of the aforesaid process and at the beginning of processing each line, an error is randomly chosen.
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公开(公告)号：CA1131289A
公开(公告)日：1982-09-07
申请号：CA343528
申请日：1980-01-11
Applicant: XEROX CORP
Inventor： CREAN PETER A , SPENCER PAUL R
Abstract: Optical fibers are used to sense fluid ink drops along the x, y and z axis of an orthogonal coordinate system. A drop sensing zone is defined in the narrow space between the faces of a single input fiber and two output fibers. An LED infrared light source is coupled to a remote end of the input fiber. Infrared sensitive photodiodes are coupled to the remote ends of each output fiber. The photodiodes are in turn coupled to a differential amplifier whose output represents a displacement error for the x and y axis and represents a time reference for the z axis for the case where the drop flight path is along the z axis. A plurality of sensors are disclosed in an ink recording system having a plurality of nozzles and in an ink recording system having an ink generator traversing the length of a high speed rotating drum.
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公开(公告)号：CA1119238A
公开(公告)日：1982-03-02
申请号：CA301829
申请日：1978-04-24
Applicant: XEROX CORP
Inventor： CREAN PETER A , LAVALLEE PIERRE A
Abstract: A line scanning apparatus employing a multiplicity of linear arrays, the linear extent of which is less than the length of the scan line. To permit an entire line to be covered, the arrays are offset from one another in the direction of scan with adjoining array ends overlapped. To correct for the misalignment and redundancy introduced, the image data from the arrays is buffered until a line is completed when readout, is initiated. During readout, cross over from one array to the next is effected within the overlapped areas and the redundant data discarded.
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Patent Agency Ranking26.发明专利
公开(公告)号：CA2345218C
公开(公告)日：2011-02-08
申请号：CA2345218
申请日：2001-04-26
Applicant: XEROX CORP
Inventor： ZECK NORMAN W , CREAN PETER A , KANG SANG-CHUL , RUMPH DAVID E , ELDRIDGE GEORGE L , NELSON WILLIAM E
Abstract: A method and apparatus for compressing and decompressing electronic documents, with maximum intradocument independence, and maximum flexibility in optimization of compression modes. The method includes receiving documents containing unknown combinations of a plural data types, including combinations of scanned data, computer rendered data, compressed data and/or rendering tags; dividing the received image into strips of blocks determining from the image itself, which data types are present in each block; compressing data of each data type present in each block with a compression method optimized for its data type. Scanned data may be further segmented into plural scanned data types, where each data type is compressed in said compressing data step with a compression method optimized for said scanned image data type. If the received data type is compressed data, the process may include the additional functions of determining a compression ratio thereof, and accepting the compressed data for use as, or decompressing and recompressing the data, based on acceptability of said compression ration determination. An instruction set is generated that allows detailed decompression instruction data and image data to be combined with transmitted compressed data. A data structure is shown, which segregates data types and instruction data, and allows for block to block and strip to strip processing independence.
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公开(公告)号：DE60137471D1
公开(公告)日：2009-03-12
申请号：DE60137471
申请日：2001-04-26
Applicant: XEROX CORP
Inventor： ZECK NORMAN W , CREAN PETER A , KANG SANG-CHUL , RUMPH DAVID E , ELDRIDGE GEORGE L , NELSON WILLIAM E
Abstract: A method and apparatus for compressing and decompressing electronic documents, with maximum intradocument independence, and maximum flexibility in optimization of compression modes. The method includes receiving documents containing unknown combinations of a plural data types, including combinations of scanned data, computer rendered data, compressed data and/or rendering tags; dividing (120) the received image into strips of blocks determining from the image itself, which data types are present in each block; compressing (310-312) data of each data type present in each block with a compression method optimized for its data type. Scanned data may be further segmented into plural scanned data types, where each data type is compressed in said compressing data step with a compression method optimized for said scanned image data type. If the received data type is compressed data, the process may include the additional functions of determining a compression ratio thereof, and accepting the compressed data for use as, or decompressing and recompressing the data, based on acceptability of said compression ration determination. An instruction set is generated that allows detailed decompression instruction data and image data to be combined with transmitted compressed data. A data structure is shown, which segregates data types and instruction data, and allows for block to block and strip to strip processing independence.
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公开(公告)号：BRPI0405943A
公开(公告)日：2005-09-06
申请号：BRPI0405943
申请日：2004-12-22
Applicant: XEROX CORP
Inventor： FARRELL MICHAEL E , CREAN PETER A , FLEYSHER DANIEL , JACOBS WILLIAM S , LYONS ROBERT E , ROBSON THOMAS , RUMPH DAVID E , SALTIFY MUNIR G , SMITH MARK A , THIBODEAU ERIC J
Abstract: The invention generates a page description language compliant data stream (S140), that has been pre-designed and pre-processed to create unique and predictable page element ordering, overlay and layout, and for splitting large page elements into multiple independent elements. In this way, multiple processors can be used to render the document without merging the data stream.
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公开(公告)号：BRPI0401864A
公开(公告)日：2005-01-18
申请号：BRPI0401864
申请日：2004-05-28
Applicant: XEROX CORP
Inventor： DALAL EDUL N , RASMUSSEN D RENE , CREAN PETER A
Abstract: A toner process control process, which includes substantially predicting an effect of reload error on a developed test patch, generating a developed test patch, sensing color density data from the test patch with a sensor, altering the sensed color density data to compensate for the predicted effect of reload error, and adjusting toner output according to the altered sensed color density data.
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公开(公告)号：BR0102190A
公开(公告)日：2001-12-26
申请号：BR0102190
申请日：2001-04-30
Applicant: XEROX CORP
Inventor： ZECK NORMAN W , CREAN PETER A , KANG SANG-CHUL , RUMPH DAVID E , ELDRIDGE GEORGE L , NELSON WILLIAM E
Abstract: A method and apparatus for compressing and decompressing electronic documents, with maximum intradocument independence, and maximum flexibility in optimization of compression modes. The method includes receiving documents containing unknown combinations of a plural data types, including combinations of scanned data, computer rendered data, compressed data and/or rendering tags; dividing (120) the received image into strips of blocks determining from the image itself, which data types are present in each block; compressing (310-312) data of each data type present in each block with a compression method optimized for its data type. Scanned data may be further segmented into plural scanned data types, where each data type is compressed in said compressing data step with a compression method optimized for said scanned image data type. If the received data type is compressed data, the process may include the additional functions of determining a compression ratio thereof, and accepting the compressed data for use as, or decompressing and recompressing the data, based on acceptability of said compression ration determination. An instruction set is generated that allows detailed decompression instruction data and image data to be combined with transmitted compressed data. A data structure is shown, which segregates data types and instruction data, and allows for block to block and strip to strip processing independence.
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