公开(公告)号：US20170139363A1

公开(公告)日：2017-05-18

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: G06F3/12

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.

公开(公告)号：US20170139344A1

公开(公告)日：2017-05-18

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: G06F3/12

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：US20170139343A1

公开(公告)日：2017-05-18

申请号：US15352276

申请日：2016-11-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuu Matsuda ,  Go Araki

IPC: G06F3/12

CPC classification number: G03G15/043

Abstract: An image forming apparatus includes an identifying unit configured to identify on basis of image data, a pixel to be corrected from a plurality of pixels of an image to be formed from the image data, a holding unit configured to hold a plurality of correction information pieces describing correction amounts for exposure amounts, and a correcting unit configured to select a correction information piece from the plurality of correction information pieces on basis of distances between one of the pixels to be corrected and a plurality of edges of the image formed from the image data and to correct an exposure amount to be applied by an exposing unit to the pixel to be corrected on basis of the selected correction information piece from an exposure amount corresponding to the image data.

公开(公告)号：US09575314B2

公开(公告)日：2017-02-21

申请号：US13685264

申请日：2012-11-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki

IPC: B41J2/47 ,  G02B26/12

CPC classification number: G02B26/124 ,  B41J2/471 ,  G02B26/127

Abstract: An image forming apparatus includes: a polygon mirror formed with a plurality of reflection surfaces, and a generating device configured to generate a pulse signal required to modulate a laser beam based on image data. The generating device is further configured to generate a pulse signal by inserting or deleting a pulse signal having a width smaller than a width of a pulse signal corresponding to one pixel of the image data into or from a pulse signal corresponding to the image data based on information associated with deviation amounts between lengths of scanning lines formed by the plurality of reflection surfaces and a reference value, so as to adjust the lengths of the scanning lines formed by the plurality of reflection surfaces to be closer to the reference value.

Abstract translation: 一种图像形成装置，包括：形成有多个反射面的多面镜;以及生成装置，其被配置为基于图像数据生成调制激光所需的脉冲信号。 该发生装置还被配置为通过基于对应于图像数据的脉冲信号插入或删除具有小于对应于图像数据的一个像素的脉冲信号的宽度的脉冲信号而产生脉冲信号 与由多个反射表面形成的扫描线的长度之间的偏移量相关联的信息和参考值，以便将由多个反射表面形成的扫描线的长度调整为更接近参考值。

公开(公告)号：US20160124336A1

公开(公告)日：2016-05-05

申请号：US14885071

申请日：2015-10-16

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 by a 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 a 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来自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不将要进行校正的像素的区域的至少一部分根据像素之间的距离而曝光来校正由曝光单元施加到要进行校正的像素的曝光量 对图像数据进行校正和图像边缘。

公开(公告)号：US09298124B2

公开(公告)日：2016-03-29

申请号：US14596398

申请日：2015-01-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Go Araki ,  Norihito Naito

IPC: G03G15/04 ,  G03G15/043

CPC classification number: G03G15/043 ,  G03G15/50 ,  G03G2215/0431

Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.

公开(公告)号：US20160034798A1

公开(公告)日：2016-02-04

申请号：US14807010

申请日：2015-07-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shigeo Kodama ,  Hisashi Ishikawa ,  Go Araki

IPC: G06K15/02

CPC classification number: H04N1/40 ,  G06K15/1881 ,  H04N1/405 ,  H04N1/4092

Abstract: An apparatus that corrects multivalued data after halftone processing and which includes a line input unit configured to input multivalued data of a correction line to be corrected among the multivalued data, a detection unit configured to convert multivalued data of a precedent line that precedes the correction line by N lines into dot data and to detect a dot in the precedent line, and a line correction unit configured to correct the multivalued data of the correction line based on a number of linked dots from the bottom-end edge, and the number of linked detected dots is the number of dots that are linked in a sub scanning direction from the correction line down to the bottom-end edge, and the bottom-end edge is an edge at which the density becomes lower in the sub scanning direction and the lower of density values represents the background color.

Abstract translation: 一种在半色调处理之后校正多值数据的装置，包括线路输入单元，被配置为输入多值数据中要校正的校正线的多值数据;检测单元，被配置为转换校正行之前的先前行的多值数据 由N行变成点数据并检测前一行中的点，以及行校正单元，被配置为基于来自底端边缘的链接数量校正校正线的多值数据，以及链接的数量 检测点是从副校正线向下端边缘的副扫描方向上连接的点数，底端边缘是副扫描方向的密度变低的边缘，下侧边缘 的密度值代表背景颜色。