公开(公告)号：CA2347205C

公开(公告)日：2009-03-24

申请号：CA2347205

申请日：2001-05-08

Applicant: XEROX CORP

Inventor： LUNG VINCENT C ,  RUMPH DAVID E ,  HAINS CHARLES M

IPC: G06F3/12 ,  G03G13/01 ,  H04N1/405

Abstract: This invention is a method of producing a set of TRC's for a color printer' s secondary halftone screens that is correlated with the printer's primary halftone screens. The method makes use of the printer/screen characteristic data that is normally gathered during screen calibration. However, instead of progressing from the data to a normal calibration for the secondary screens, the method goes backward through the data starting with the finished primary screen TRC's. The method insures that for every primary screen density, the closest possible secondary screen density is used when t he same digital value is specified.

公开(公告)号：CA2347205A1

公开(公告)日：2001-11-12

申请号：CA2347205

申请日：2001-05-08

Applicant: XEROX CORP

Inventor： RUMPH DAVID E ,  LUNG VINCENT C ,  HAINS CHARLES M

IPC: G03G13/01 ,  G06F3/12 ,  H04N1/405

Abstract: This invention is a method of producing a set of TRC's for a color printer 's secondary halftone screens that is correlated with the printer's primary halftone screens. The method makes use of the printer/screen characteristic data that is normally gathered during screen calibration. However, instead of progressing from the data to a normal calibration for the secondary screens, the method goes backward through the data starting with the finished primary screen TRC's. The method insures that for every primary screen density, the closest possible secondary screen density is used when t he same digital value is specified.

公开(公告)号：DE69223443T2

公开(公告)日：1998-06-25

申请号：DE69223443

申请日：1992-05-06

Applicant: XEROX CORP

Inventor： BUCKLEY ROBERT R ,  RUMPH DAVID E

IPC: B41J2/52 ,  H04N1/23 ,  H04N1/387 ,  H04N1/46

Abstract: A circuit for enabling the raster display of text or line art in one constant color against a background of another constant color or against a continuous-tone picture, or the display of a continuous-tone picture having a boundary of arbitrary shape. The circuit has four channels, one each for constant colors, continuous-tone images, image masks, and instructions. The constant colors are stored in the first channel in the form of two eight-bit colors, one for the text or line art and one for the background. Any color pair can be read from this memory, divided into two eight-bit colors, and presented at two inlets of a final multiplexer (28). The second channel stores continuous-tone color pictures and presents this information at a third inlet of the multiplexer (28). The third channel receives masks or outlines in the form of bitmaps, and the fourth channel receives instructions which may be run-length encoded. These two channels combine their data, which is then used to control the multiplexer (28).

公开(公告)号：CA2490192A1

公开(公告)日：2005-06-22

申请号：CA2490192

申请日：2004-12-15

Applicant: XEROX CORP

Inventor： RUMPH DAVID E ,  FARRELL MICHAEL E ,  CREAN PETER A ,  SMITH MARK A ,  ROBSON THOMAS ,  THIBODEAU ERIC J ,  FLEYSHER DANIEL ,  JACOBS WILLIAM S ,  SALFITY MUNIR G ,  LYONS ROBERT E

IPC: B41J5/30 ,  G06F3/12 ,  G06K15/02 ,  H04N1/00 ,  H04N1/387

Abstract: The invention generates a page description language compliant data strea m, that has been pre-designed and pre-processed to create unique and predictabl e 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.

公开(公告)号：CA2346545A1

公开(公告)日：2001-11-12

申请号：CA2346545

申请日：2001-05-07

Applicant: XEROX CORP

Inventor： EVANS SUSAN ,  WELLS TERRY C ,  RUMPH DAVID E

IPC: G06K15/00 ,  G06K15/02 ,  G06F3/12

Abstract: A method of determining whether a page to be printed on a color printer wi ll actually be entirely printed in one colorant, usually black, and if so, automatically omitting whatever processing steps are unnecessary as a result. Determining if the page is monochrome can be done either by (1) including a signal in the PDL or by a signal from the user or by (2) inspecting each element of the page to determine if all elements are specified to be printed in the same one colorant. If either is true, then various color operations such as trapping, color conversion to any other color, and color correction for non-selected colors can be automatically omitted.

公开(公告)号：CA2490192C

公开(公告)日：2009-08-11

申请号：CA2490192

申请日：2004-12-15

Applicant: XEROX CORP

Inventor： RUMPH DAVID E ,  SALFITY MUNIR G ,  ROBSON THOMAS ,  CREAN PETER A ,  JACOBS WILLIAM S ,  FLEYSHER DANIEL ,  FARRELL MICHAEL E ,  LYONS ROBERT E ,  SMITH MARK A ,  THIBODEAU ERIC J

IPC: B41J5/30 ,  G06F3/12 ,  G06K15/02 ,  H04N1/00 ,  H04N1/387

Abstract: The invention generates a page description language compliant data strea m, that has been pre-designed and pre-processed to create unique and predictabl e 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.

公开(公告)号：BR0101953A

公开(公告)日：2001-12-18

申请号：BR0101953

申请日：2001-05-11

Applicant: XEROX CORP

Inventor： HAINS CHARLES M ,  RUMPH DAVID E ,  LUNG VINCENT C

IPC: G03G13/01 ,  G06F3/12 ,  H04N1/405

公开(公告)号：BR0101951A

公开(公告)日：2001-12-18

申请号：BR0101951

申请日：2001-05-11

Applicant: XEROX CORP

Inventor： RUMPH DAVID E ,  WELLS TERRY C ,  EVANS SUSAN

IPC: G06K15/00 ,  G03G13/01

Abstract: A method of determining whether a page to be printed on a color printer will actually be entirely printed in one colorant, usually black, and if so, automatically omitting whatever processing steps are unnecessary as a result. Determining if the page is monochrome can be done either by (1) including a signal in the PDL or by a signal from the user or by (2) inspecting each element of the page to determine if all elements are specified to be printed in the same one colorant. If either is true, then various color operations such as trapping, color conversion to any other color, and color correction for non-selected colors can be automatically omitted.

公开(公告)号：DE69223443D1

公开(公告)日：1998-01-22

申请号：DE69223443

申请日：1992-05-06

Applicant: XEROX CORP

Inventor： BUCKLEY ROBERT R ,  RUMPH DAVID E

IPC: B41J2/52 ,  H04N1/23 ,  H04N1/387 ,  H04N1/46

Abstract: A circuit for enabling the raster display of text or line art in one constant color against a background of another constant color or against a continuous-tone picture, or the display of a continuous-tone picture having a boundary of arbitrary shape. The circuit has four channels, one each for constant colors, continuous-tone images, image masks, and instructions. The constant colors are stored in the first channel in the form of two eight-bit colors, one for the text or line art and one for the background. Any color pair can be read from this memory, divided into two eight-bit colors, and presented at two inlets of a final multiplexer (28). The second channel stores continuous-tone color pictures and presents this information at a third inlet of the multiplexer (28). The third channel receives masks or outlines in the form of bitmaps, and the fourth channel receives instructions which may be run-length encoded. These two channels combine their data, which is then used to control the multiplexer (28).

公开(公告)号：CA2061057A1

公开(公告)日：1992-11-08

申请号：CA2061057

申请日：1992-02-12

Applicant: XEROX CORP

Inventor： BUCKLEY ROBERT R ,  RUMPH DAVID E

IPC: B41J2/52 ,  H04N1/23 ,  H04N1/387 ,  H04N1/46 ,  G09G5/36 ,  G06F3/12 ,  G06F15/72

Abstract: A circuit for enabling the raster display of text or line art in one constant color against a background of another constant color or against a continuous-tone picture, or the display of a continuous-tone picture having a boundary of arbitrary shape. The circuit has four channels, one each for constant colors, continuous-tone images, image masks, and instructions. The constant colors are stored in the first channel in the form of two eight-bit colors, one for the text or line art and one for the background. Any color pair can be read from this memory, divided into two eight-bit colors, and presented at two inlets of a final multiplexer (28). The second channel stores continuous-tone color pictures and presents this information at a third inlet of the multiplexer (28). The third channel receives masks or outlines in the form of bitmaps, and the fourth channel receives instructions which may be run-length encoded. These two channels combine their data, which is then used to control the multiplexer (28).