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    MEDIA/SCREEN LOOK-UP-TABLE FOR COLOR CONSISTENCY
    1.
    发明专利
    MEDIA/SCREEN LOOK-UP-TABLE FOR COLOR CONSISTENCY 未知

    公开(公告)号：CA2434633C

    公开(公告)日：2009-10-06

    申请号：CA2434633

    申请日：2003-07-08

    Applicant: XEROX CORP

    Inventor： CREAN PETER A ,  SKINNER GARY W ,  MESTHA LALIT K ,  BREWINGTON GRACE T

    IPC: G06F3/12 ,  G06T5/00 ,  G03G13/00 ,  H04N1/40 ,  H04N1/405 ,  H04N1/407 ,  H04N1/60

    Abstract: In an image rendering system, a method of compensating for system performance changes related to image attributes includes rendering a diagnostic image, sensing at least one image quality from the diagnostic image, updatin g an image attribute compensation tone reproduction curve based on the sensed ima ge quality and rendering an image based on the updated image attribute compensation tone reproduction curve. For example, image attributes include print media type and a halftone screen selection. An image processing system operative to perform the method of compensation includes a set of image attribute compensation tone reproduction curves. Each curve of the set is associated with a particular combination of image attributes. For example, each curve is associated with a particular media type/halftone screen combination.

    IMAGE MAGNIFICATION AND DEMAGNIFICATION SYSTEM
    2.
    发明专利
    IMAGE MAGNIFICATION AND DEMAGNIFICATION SYSTEM 未知

    公开(公告)号：CA1202130A

    公开(公告)日：1986-03-18

    申请号：CA371959

    申请日：1981-02-27

    Applicant: XEROX CORP

    Inventor： CREAN PETER A ,  AGULNEK MARTIN A

    IPC: G03G15/22 ,  G03G15/041 ,  G06T3/40 ,  H04N1/10 ,  H04N1/393 ,  B41L19/00

    Abstract: An image size control system for controlling the size of the image produced by pixels generated by a raster scanner. A binary rate multiplier is used for image size control along the X-axis, the multiplier being programmed to the size image desired to vary the frequency of the pixel clock signals output by the multiplier. A control flip-flop astride the image pixel stream is driven by the multiplier clock signals to speed up or reduce the rate at which image pixels are output with consequent change in image size along the X-axis. For image size control along the Y-axis, a phase lock loop speed controller is provided for the scanning carriage drive motor with programmable frequency generator. The frequency output of the generator is settable to the image size desired, changes in image size being achieved either by increasing or decreasing the rate at which the scanning carriage is moved.

    ELECTROSTATIC LENS FOR INK JETS
    3.
    发明专利
    ELECTROSTATIC LENS FOR INK JETS 未知

    公开(公告)号：CA1129938A

    公开(公告)日：1982-08-17

    申请号：CA338596

    申请日：1979-10-26

    Applicant: XEROX CORP

    Inventor： CREAN PETER A

    IPC: B41J2/075 ,  B41J2/08 ,  B41J2/085 ,  B41J2/09 ,  G06K15/10 ,  G01D15/18 ,  H01J37/12

    Abstract: ELECTROSTATIC LENS FOR INK JETS An ink jet printer is disclosed employing a row of multiple ink jet nozzles aimed at a moving target or copy sheet. Each nozzle has a separate charging electrode associated with it but all the nozzles share a pair of common deflection plates that divert charged droplets over a shared gutter toward the target. Uncharged droplets go into the gutter. An electrostatic lens is shared by all the nozzles being positioned in the path of the charged droplets deflected toward the target. The lens aligns or focuses charged droplets from all the nozzles to a focus line on the target despite misalignment of nozzles relative to a print line on the target.

    MEDIA/SCREEN LOOK-UP-TABLE FOR COLOR CONSISTENCY
    6.
    发明专利
    MEDIA/SCREEN LOOK-UP-TABLE FOR COLOR CONSISTENCY 未知

    公开(公告)号：CA2434633A1

    公开(公告)日：2004-01-16

    申请号：CA2434633

    申请日：2003-07-08

    Applicant: XEROX CORP

    Inventor： SKINNER GARY W ,  MESTHA LALIT K ,  CREAN PETER A ,  BREWINGTON GRACE T

    IPC: G06F3/12 ,  G06T5/00 ,  H04N1/40 ,  H04N1/405 ,  H04N1/407 ,  H04N1/60 ,  G03G13/00

    Abstract: In an image rendering system, a method of compensating for system performance changes related to image attributes includes rendering a diagnostic image, sensing at least one image quality from the diagnostic image, updatin g an image attribute compensation tone reproduction curve based on the sensed ima ge quality and rendering an image based on the updated image attribute compensation tone reproduction curve. For example, image attributes include print media type and a halftone screen selection. An image processing system operative to perform the method of compensation includes a set of image attribute compensation tone reproduction curves. Each curve of the set is associated with a particular combination of image attributes. For example, each curve is associated with a particular media type/halftone screen combination.

    7.
    发明专利
    未知

    公开(公告)号：BR0106247A

    公开(公告)日：2002-08-13

    申请号：BR0106247

    申请日：2001-12-21

    Applicant: XEROX CORP

    Inventor： ELDRIDGE GEORGE L ,  SMITH MARK A ,  PHONG SAN A ,  BLURFRUSHAN FARZIN ,  GHARABEGIAN HILDA ,  CREAN PETER A

    IPC: G06T3/40 ,  G06T9/00 ,  H04N1/40 ,  B41J19/00

    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.

    PIXEL MAGNIFICATION/DEMAGNIFICATION APPARATUS AND METHOD
    8.
    发明专利
    PIXEL MAGNIFICATION/DEMAGNIFICATION APPARATUS AND METHOD 未知

    公开(公告)号：DE3173169D1

    公开(公告)日：1986-01-23

    申请号：DE3173169

    申请日：1981-03-05

    Applicant: XEROX CORP

    Inventor： CREAN PETER A ,  AGULNEK MARTIN A

    IPC: G03G15/22 ,  G03G15/041 ,  G06T3/40 ,  H04N1/10 ,  H04N1/393 ,  G03B27/32 ,  G03F1/00

    Abstract: Pixel magnification/demagnification apparatus and method are disclosed for controlling the size of reproducible image, the image being represented by video image signals or pixels generated by a raster scanner (12). A binary rate multiplier (102) is used for image size control along the X-axis, the multiplier being programmed to the size image desired to vary the frequency of the pixel clock signals output by the multiplier. A control flip-flop (45) astride the image pixel stream is driven by the multiplier clock signals to speed up or reduce the rate at which image pixels are output with consequent change in image size along the X-axis. … For image size control along the Y-axis, a phase lock loop (86) control with programmable frequency generator (82) is provided for the scanning carriage drive motor (39). The frequency output of the generator is settable to the image size desired, changes in image size along the Y-axis being achieved either by increasing or decreasing the rate at which the scanning carriage (32) is moved.

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