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    IMAGE FORMING APPARATUS AND IMAGE PROCESSING APPARATUS THAT SPECIFY PIXELS TO BE SUBJECTED TO CORRECTION, AND CORRECT EXPOSURE AMOUNT
    31.
    发明申请
    IMAGE FORMING APPARATUS AND IMAGE PROCESSING APPARATUS THAT SPECIFY PIXELS TO BE SUBJECTED TO CORRECTION, AND CORRECT EXPOSURE AMOUNT 审中-公开
    图像形成装置和图像处理装置，其具体要素要被校正，并且校正曝光量

    公开(公告)号：US20160274483A1

    公开(公告)日：2016-09-22

    申请号：US15171250

    申请日：2016-06-02

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Go Araki ,  Hidenori Kanazawa

    IPC: G03G15/043

    CPC classification number: G03G15/043 ,  H04N1/508

    Abstract: An image forming apparatus includes: specifying unit configured to specify, based on image data, a pixel to be subjected to correction from among pixels of an image to be formed from the image data; and a correction unit configured to correct an exposure amount of an exposure unit for the pixel to be subjected to correction from an exposure amount indicated by the image data. The correction unit is further configured to correct the exposure amount applied by the exposure unit to the pixel to be subjected to correction by not exposing at least a portion of a region of the pixel to be subjected to correction according to the distance between the pixel to be subjected to correction and an edge of the image to be formed from the image data.

    Abstract translation: 图像形成装置包括：指定单元，被配置为基于图像数据从要从图像数据形成的图像的像素中指定要进行校正的像素; 以及校正单元，被配置为从由图像数据指示的曝光量校正要进行校正的像素的曝光单元的曝光量。 校正单元还被配置为通过根据像素之间的距离而不曝光要进行校正的像素的区域的至少一部分来将曝光单元施加的曝光量校正为要进行校正的像素 对图像数据进行校正和图像边缘。

    IMAGE FORMING APPARATUS THAT FORMS LATENT IMAGE BY IRRADIATING PHOTOSENSITIVE MEMBER WITH LIGHT
    32.
    发明申请
    IMAGE FORMING APPARATUS THAT FORMS LATENT IMAGE BY IRRADIATING PHOTOSENSITIVE MEMBER WITH LIGHT 有权
    通过照射光敏成员形成图像的图像形成装置

    公开(公告)号：US20160246208A1

    公开(公告)日：2016-08-25

    申请号：US15040436

    申请日：2016-02-10

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Osamu Nagasaki ,  Go Araki ,  Hidenori Kanazawa

    IPC: B41J2/385

    CPC classification number: G03G15/043 ,  H04N1/387 ,  H04N1/401

    Abstract: A scanning unit performs scanning over a photosensitive member with a laser beam irradiated from a light source. A width correction unit corrects exposure time. A luminance correction unit corrects luminance of the laser beam for forming latent images. A density correction unit corrects a density value of each of the pixels of the image data according to a scanning position of the laser beam on the surface of the photosensitive member.

    Abstract translation: 扫描单元利用从光源照射的激光束对光敏部件进行扫描。 宽度校正单元校正曝光时间。 亮度校正单元校正用于形成潜像的激光束的亮度。 密度校正单元根据激光束在感光构件的表面上的扫描位置校正图像数据的每个像素的浓度值。

    Image forming apparatus configured to perform halftone processing
    35.
    发明授权
    Image forming apparatus configured to perform halftone processing 有权

    公开(公告)号：US11973914B2

    公开(公告)日：2024-04-30

    申请号：US18159142

    申请日：2023-01-25

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Go Araki ,  Mitsuhiro Obara

    IPC: H04N1/405 ,  G03G15/043 ,  H04N1/29 ,  H04N1/52 ,  H04N1/053 ,  H04N1/193

    CPC classification number: H04N1/4052 ,  G03G15/043 ,  H04N1/295 ,  H04N1/52 ,  H04N1/053 ,  H04N1/1933

    Abstract: An image forming apparatus includes: a scanning unit configured to form an electrostatic latent image on a photoconductor by scanning the photoconductor with one or more scanning beams in a main scanning direction based on an image signal, repetitively in a sub-scanning direction perpendicular to the main scanning direction; a generating unit configured to perform halftone processing on image data to generate the image signal; and a storage unit configured to store correction information. The correction information is set such that start positions of a plurality of scanning lines are linearly displaced to either a negative side or a positive side of the main scanning direction along the sub-scanning direction, in accordance with a direction of a first vector forming a smaller angle with the sub-scanning direction among two vectors in the halftone processing.

    Image forming apparatus
    36.
    发明授权
    Image forming apparatus 有权

    公开(公告)号：US10824104B2

    公开(公告)日：2020-11-03

    申请号：US16268640

    申请日：2019-02-06

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Go Araki

    IPC: G06F3/12 ,  G06F15/00 ,  G06K1/00 ,  G03G15/00 ,  G03G15/043

    Abstract: An image forming apparatus configured to form an image in a first mode and in a second mode in which the image forming apparatus is operated under an image forming condition in which developer supplying capability from a developer carrying member to an image bearing member is increased to form the image, the image forming apparatus including: a determination unit configured to determine whether an input image is an image in a predetermined condition in which the input image is a fine line having a predetermined width or less, a miniature image, or a character having predetermined points or less; and a correction unit configured to set a line width thin or lighten density for an image determined as the image in the predetermined condition by the determination unit at a time of forming the image in the second mode.

    Tone correction image processing based on pixel formation position on a photoreceptor
    37.
    发明授权
    Tone correction image processing based on pixel formation position on a photoreceptor 有权

    公开(公告)号：US10545446B2

    公开(公告)日：2020-01-28

    申请号：US15351730

    申请日：2016-11-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yoichi Takikawa ,  Ryosuke Otani ,  Hidenori Kanazawa ,  Go Araki ,  Hisashi Ishikawa

    IPC: G03G15/00 ,  G03G15/01

    Abstract: The present invention performs inplane uneven density correction that suppresses a number of tone correction properties and has few correction residuals. Accordingly, a holding unit of an apparatus of the present invention holds a plurality of tone correction properties respectively corresponding to a plurality of spot diameters that divide a range of a spot diameter of a light exposed on a surface of a photoreceptor by a predetermined interval. In addition a setting unit sets a tone correction property selected from the plurality of tone correction properties based on a spot diameter on the photoreceptor for a pixel corresponding to pixel data C. A correction unit corrects the pixel data C based on the set tone correction property, to generate tone correction data Cc.

    Image forming apparatus and method for counting image signals with changed image signal width
    39.
    发明授权
    Image forming apparatus and method for counting image signals with changed image signal width 有权

    公开(公告)号：US09772578B2

    公开(公告)日：2017-09-26

    申请号：US15169402

    申请日：2016-05-31

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yuki Nakajima ,  Go Araki ,  Hidenori Kanazawa

    IPC: G03G15/043 ,  G03G21/14

    CPC classification number: G03G15/043 ,  G03G21/14

    Abstract: There is provided an image forming apparatus comprising: a scanning unit configured to scan, in accordance with image signals, a photosensitive member with laser light in a main scanning direction at a scanning speed that is not constant; an image signal generation unit configured to generate image signals that are changed such that the faster the scanning speed is, the narrower an image signal width becomes; a clock signal generation unit configured to generate sampling clock signals for sampling the image signals whose image signal width is changed such that the faster the scanning speed is, the shorter a sampling interval becomes; and a count unit configured to count image signals whose image signal width is changed based on the sampling clock signals.

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