公开(公告)号：US10073370B2

公开(公告)日：2018-09-11

申请号：US15352882

申请日：2016-11-16

Applicant: CANON KABUSHIKI KAISHA

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

IPC: H04N1/60 ,  G06F15/00 ,  G06K1/00 ,  G03G15/043

CPC classification number: G03G15/043

Abstract: The present invention performs inplane uneven density correction that suppresses a number of tone correction properties and has few correction residuals. Accordingly, a correction unit corrects pixel data D based on a plurality of tone correction properties respectively corresponding to a plurality of spot diameters of a light to expose on a surface of a photoreceptor, and to generate a plurality of pieces of correction data D1 and D2. A setting unit sets a ratio Rb based on a spot diameter on the photoreceptor of a pixel corresponding to the pixel data D. A blending unit generates tone correction data Dc by blending the plurality of pieces of correction data D1 and D2 based on the ratio Rb.

公开(公告)号：US09964888B2

公开(公告)日：2018-05-08

申请号：US15624379

申请日：2017-06-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Izuru Horiuchi ,  Yoichi Takikawa ,  Jun Hirabayashi

IPC: G03G15/04 ,  G03G15/043 ,  G02B26/12 ,  B41J2/47

CPC classification number: G03G15/043 ,  B41J2/471 ,  G02B26/127 ,  G03G15/04072

Abstract: An incidence angle of laser light with respect to a photosensitive member in a main-scanning direction is different depending on an exposure position. Hence, the spot shape of the laser light on the photosensitive member is different in the main-scanning direction. A filter coefficient is changed in the main-scanning direction, and image data is corrected with the filter coefficient.

公开(公告)号：US20160196481A1

公开(公告)日：2016-07-07

申请号：US14983944

申请日：2015-12-30

Applicant: CANON KABUSHIKI KAISHA

Inventor： Ryosuke Otani ,  Yoichi Takikawa

IPC: G06K15/02 ,  G06K15/14

CPC classification number: G06K15/1881 ,  B41J2/475 ,  G06K15/1247 ,  G06K15/1868 ,  G06K15/1876 ,  H04N1/191

Abstract: An image forming apparatus includes a light emitting element group including a plurality of light emitting elements disposed at first intervals in a first direction, and configured to emit optical beams based on image data, a lens array including a plurality of lenses disposed at second intervals different from the first intervals in the first direction and configured to focus or condense the light emitted from the light emitting element group, and a halftone processing unit configured to perform halftone processing by using a dither matrix corresponding to a relative positional relationship between the plurality of light emitting elements and the plurality of lenses to generate the image data.

Abstract translation: 一种图像形成装置包括：发光元件组，包括沿第一方向以第一间隔布置的多个发光元件，并且被配置为基于图像数据发射光束;透镜阵列，包括以不同的第二间隔设置的多个透镜 从所述第一方向的所述第一间隔开始，将从所述发光元件组发出的光聚焦或聚焦，并配置为通过使用与所述多个光之间的相对位置关系对应的抖动矩阵进行半色调处理的半色调处理部 发射元件和多个透镜以产生图像数据。

公开(公告)号：US20130120807A1

公开(公告)日：2013-05-16

申请号：US13734831

申请日：2013-01-04

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoichi Takikawa ,  Hideki Kubo

IPC: H04N1/04

CPC classification number: H04N1/04 ,  B41J2/471 ,  G03G15/50 ,  G03G2215/00042 ,  H04N1/409

Abstract: Banding can be prevented and image-quality degradation can be reduced. An image processing apparatus includes first creation means configured to distribute density of image data to a pixel on another scanning line on the basis of a difference between an actual print position of the image data and a reference position and to create position-corrected image data, second creation means configured to correct the image data using a correction value corresponding to a position of the image data and to create density-corrected image data, and generation means configured to generate output image data using the position-corrected image data created by the first creation means and the density-corrected image data created by the second creation means.

Abstract translation: 可防止带状物，降低图像质量下降。 图像处理装置包括：第一创建装置，被配置为基于图像数据的实际打印位置与基准位置之间的差异，将图像数据的浓度分配到另一扫描线上的像素，并且创建位置校正图像数据， 第二创建装置，被配置为使用与图像数据的位置相对应的校正值来校正图像数据，并且创建密度校正图像数据;以及生成装置，被配置为使用由第一图像数据创建的位置校正图像数据来生成输出图像数据 创建装置和由第二创建装置创建的密度校正图像数据。