Correction method for image forming apparatus

    公开(公告)号:US10021271B2

    公开(公告)日:2018-07-10

    申请号:US15210402

    申请日:2016-07-14

    发明人: Izuru Horiuchi

    摘要: A correction method for an image forming apparatus including a light source including a plurality of light emitting points, a photosensitive member configured to rotate in a first direction, and a deflection unit configured to deflect light beams emitted from the light source in a second direction orthogonal to the first direction to form scanning lines, the correction method including: a storing step of storing information on positional deviation of the scanning lines in the first direction; a conversion step of converting positions of pixels of an input image by performing coordinate transformation based on the information so that an interval of the scanning lines becomes a predetermined interval; and a filtering step of determining pixel values of pixels of an output image by subjecting pixel values of the pixels of the input image after the coordinate transformation to a convolution operation.

    GENERATING A HALFTONE
    83.
    发明申请

    公开(公告)号:US20180152596A1

    公开(公告)日:2018-05-31

    申请号:US15793811

    申请日:2017-10-25

    申请人: HP SCITEX LTD.

    发明人: Alex Veis

    IPC分类号: H04N1/405 H04N1/60

    摘要: In one example, halftone data comprising first data and second data representing a plurality of pixels in a halftone is generated. The first data associates a first subset of the plurality of pixels in the halftone with a first colorant, the first subset defining a first region in the halftone. The second data associates a second subset of the plurality of pixels in the halftone with a second colorant different from the first colorant, the second subset defining a second region in the halftone. The first subset of the plurality of pixels in the halftone and the second subset of the plurality of pixels in the halftone are mutually exclusive, and the first region is at least partially enclosed by the second region.

    Image forming control apparatus, method of generating correction data, and storage medium

    公开(公告)号:US09930215B2

    公开(公告)日:2018-03-27

    申请号:US15270221

    申请日:2016-09-20

    申请人: Makoto Yoshida

    发明人: Makoto Yoshida

    IPC分类号: H04N1/407 G06K15/02 H04N1/405

    摘要: An image forming control apparatus for controlling an image forming apparatus to form an image on a recording medium includes a memory to store a target property data of original gradation values of image data of a target image to be formed on the recording medium; and circuitry to acquire actual property data of the target image actually formed on the recording medium, convert the original gradation values to another gradation values, generate a primary correction data based on the original gradation values and the another gradation values, generate a secondary correction data to supplement the generated primary correction data, compare the primary correction data and the secondary correction data, and generate gradation correction data used for correcting the original gradation values existing in a specific range of the original gradation values based on a comparison result of the primary correction data and the secondary correction data.

    Selection of Halftoning Technique
    86.
    发明申请

    公开(公告)号:US20180084151A1

    公开(公告)日:2018-03-22

    申请号:US15665706

    申请日:2017-08-01

    摘要: An example embodiment may involve causing a page of a document to be printed on a printing device, wherein the printing device is in an AM halftoning mode and prints the page using an AM halftone; displaying, on the display unit, a graphical user interface, wherein the graphical user interface includes a selectable option to switch the printing device from the AM halftoning mode to an FM halftoning mode; receiving an indication that the selectable option has been selected; possibly in response to receiving the indication that the selectable option has been selected, causing the printing device to switch from the AM halftoning mode to the FM halftoning mode; and causing the page of the document to be printed again on the printing device, wherein the printing device is in the FM halftoning mode and prints the page using an FM halftone.