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    Color image forming apparatus
    1.
    发明申请
    Color image forming apparatus 有权
    彩色图像形成装置

    公开(公告)号：US20060290767A1

    公开(公告)日：2006-12-28

    申请号：US11444406

    申请日：2006-06-01

    申请人： Hiroki Tezuka ,  Yoshiyuki Akiba ,  Hiroki Kitamura

    发明人： Hiroki Tezuka ,  Yoshiyuki Akiba ,  Hiroki Kitamura

    IPC分类号： G03G15/01

    CPC分类号： H04N1/506 ,  G03G15/0142 ,  G03G15/0194 ,  G03G2215/0119 ,  G03G2215/0158 ,  H04N2201/0471 ,  H04N2201/04722

    摘要： A color image forming apparatus includes coordinate conversion means which converts a ordinate value, for executing a misregistration correction in the unit of a pixel; gradation conversion means which converts a gradation level, for executing a misregistration correction in a unit less than a pixel; and judgment means which detects a feature of the image and judges whether or not to execute the misregistration correction in a unit less than a pixel by the gradation conversion means, wherein the judgment means compares the gradation level in an object pixel and a pixel adjacent in a sub scanning direction, thereby judging whether or not to execute the misregistration correction in a unit less than a pixel. Thus the invention enables to distinguish an image to be subjected to the registration correction less than a pixel and an image not to be subjected to such correction in a simple manner and also in consideration of the image color.

    摘要翻译： 彩色图像形成装置包括坐标转换装置，其转换纵坐标值，用于以像素为单位执行不对准校正; 灰度转换装置，其转换灰度级，用于执行小于像素的单位的对准校正; 以及判断装置，其检测图像的特征，并且通过灰度转换装置判断是否以小于像素的单位执行重新排列校正，其中判断装置将目标像素中的灰度级与相邻的像素进行比较 副扫描方向，从而判断是否以小于像素的单位执行对准校正。 因此，本发明能够以简单的方式，以及考虑图像颜色，将小于像素的注册校正图像和不进行这种校正的图像区分开来。

    Color image forming apparatus
    2.
    发明授权
    Color image forming apparatus 有权
    彩色图像形成装置

    公开(公告)号：US07598971B2

    公开(公告)日：2009-10-06

    申请号：US11444406

    申请日：2006-06-01

    申请人： Hiroki Tezuka ,  Yoshiyuki Akiba ,  Hiroki Kitamura

    发明人： Hiroki Tezuka ,  Yoshiyuki Akiba ,  Hiroki Kitamura

    IPC分类号： G03G15/01 ,  B41J2/525 ,  B41J2/52

    CPC分类号： H04N1/506 ,  G03G15/0142 ,  G03G15/0194 ,  G03G2215/0119 ,  G03G2215/0158 ,  H04N2201/0471 ,  H04N2201/04722

    摘要： A color image forming apparatus includes a coordinate conversion part, which converts a ordinate value, for executing a misregistration correction in the unit of a pixel; a gradation conversion part, which converts a gradation level, for executing a misregistration correction in a unit less than a pixel; and a judgment part, which detects a feature of the image and judges whether or not to execute the misregistration correction in a unit less than a pixel by the gradation conversion part. The judgment part compares the gradation level in an object pixel and a pixel adjacent in a sub-scanning direction, thereby judging whether or not to execute the misregistration correction in a unit less than a pixel. Thus, the invention enables to distinguish an image to be subjected to the registration correction in a unit less than a pixel and an image not to be subjected to such correction in a simple manner and also in consideration of the image color.

    摘要翻译： 彩色图像形成装置包括坐标转换部分，其转换纵坐标值，用于以像素为单位执行不对准校正; 灰度转换部分，其转换灰度级，用于执行小于像素的单位的对准校正; 以及判断部分，其检测图像的特征，并且通过灰度转换部分判断是否以小于像素的单位执行对准校正。 判断部分比较对象像素中的灰度级与副扫描方向相邻的像素，从而判断是否以小于像素的单位执行对准校正。 因此，本发明能够以简单的方式并且考虑图像颜色，以小于像素的单位和不进行这种校正的图像来区分要进行注册校正的图像。

    Image forming apparatus and its control method
    7.
    发明申请
    Image forming apparatus and its control method 有权
    图像形成装置及其控制方法

    公开(公告)号：US20060119895A1

    公开(公告)日：2006-06-08

    申请号：US11274141

    申请日：2005-11-16

    申请人： Tsutomu Takata ,  Hiroki Kitamura ,  Yoshiyuki Akiba ,  Shuichi Nakamura ,  Yusuke Yamamoto ,  Masanao Motoyama ,  Takeshi Akiyama ,  Kenzo Tojima ,  Takaaki Nagaoka

    发明人： Tsutomu Takata ,  Hiroki Kitamura ,  Yoshiyuki Akiba ,  Shuichi Nakamura ,  Yusuke Yamamoto ,  Masanao Motoyama ,  Takeshi Akiyama ,  Kenzo Tojima ,  Takaaki Nagaoka

    IPC分类号： H04N1/409

    CPC分类号： G06K15/1878 ,  G06K15/14 ,  G06K15/188 ,  G06K15/1881 ,  H04N1/29 ,  H04N1/40062 ,  H04N1/4092 ,  H04N1/506 ,  H04N1/52 ,  H04N1/58 ,  H04N1/60 ,  H04N1/6027 ,  H04N1/6072

    摘要： With this invention, color shifting correction is performed first based on shifting amount information indicating a shifting amount with respect to the scanning direction on an image carrier of each image forming unit, and halftone processing is then performed, thus suppressing generation of moiré due to the color shifting correction, and forming a high-quality image. To this end, an image forming engine has color shifting amount storage units C, M, Y, and K (black) which store actual shifting amounts with respect to ideal scan directions on image carriers C, M, Y, and K in image forming units C, M, Y, and K. Color shifting correction amount arithmetic units C, M, Y, and K calculate color shifting correction amounts for respective color components on the basis of the stored color shifting amounts. Color shifting correction units C, M, Y, and K perform color shifting correction by converting coordinates upon reading out image data from bitmap memories C, M, Y, and K on the basis of the calculated color shifting correction amounts, and then perform tone correction. Data after tone correction undergo halftone processing by halftone processors C, M, Y, and K. PWM processors C, M, Y, and K generate PWM signals for scanning, and output them to exposure units C, M, Y, and K of the respective image forming units.

    摘要翻译： 利用本发明，首先基于在每个图像形成单元的图像载体上指示相对于扫描方向的移动量的移动量信息执行颜色偏移校正，然后执行半色调处理，从而抑制由于 颜色偏移校正，并形成高质量的图像。 为此，图像形成引擎具有在图像形成中存储图像载体C，M，Y和K上的理想扫描方向的实际移动量的色移量存储单元C，M，Y和K（黑色） 单位C，M，Y和K.颜色偏移校正量运算单元C，M，Y和K基于存储的颜色偏移量计算各个颜色分量的颜色偏移校正量。 颜色偏移校正单元C，M，Y和K基于计算出的色移校正量从位图存储器C，M，Y和K读出图像数据，通过转换坐标进行色移校正，然后执行色调 更正。 色调校正后的数据通过半色调处理器​​C，M，Y和K的半色调处理。PWM处理器C，M，Y和K生成用于扫描的PWM信号，并将其输出到曝光单元C，M，Y和K的曝光单元 相应的图像形成单元。

    IMAGE FORMING APPARATUS AND ITS CONTROL METHOD
    8.
    发明申请
    IMAGE FORMING APPARATUS AND ITS CONTROL METHOD 有权
    图像形成装置及其控制方法

    公开(公告)号：US20100220342A1

    公开(公告)日：2010-09-02

    申请号：US12716125

    申请日：2010-03-02

    申请人： Tsutomu Takata ,  Hiroki Kitamura ,  Yoshiyuki Akiba ,  Shuichi Nakamura ,  Yusuke Yamamoto ,  Masanao Motoyama ,  Takeshi Akiyama ,  Kenzo Tojima ,  Takaaki Nagaoka

    发明人： Tsutomu Takata ,  Hiroki Kitamura ,  Yoshiyuki Akiba ,  Shuichi Nakamura ,  Yusuke Yamamoto ,  Masanao Motoyama ,  Takeshi Akiyama ,  Kenzo Tojima ,  Takaaki Nagaoka

    IPC分类号： G06F15/00

    CPC分类号： G06K15/1878 ,  G06K15/14 ,  G06K15/188 ,  G06K15/1881 ,  H04N1/29 ,  H04N1/40062 ,  H04N1/4092 ,  H04N1/506 ,  H04N1/52 ,  H04N1/58 ,  H04N1/60 ,  H04N1/6027 ,  H04N1/6072

    摘要： With this invention, color shifting correction is performed first based on shifting amount information indicating a shifting amount with respect to the scanning direction on an image carrier of each image forming unit, and halftone processing is then performed, thus suppressing generation of moiré due to the color shifting correction, and forming a high-quality image. To this end, an image forming engine has color shifting amount storage units C, M, Y, and K (black) which store actual shifting amounts with respect to ideal scan directions on image carriers C, M, Y, and K in image forming units C, M, Y, and K. Color shifting correction amount arithmetic units C, M, Y, and K calculate color shifting correction amounts for respective color components on the basis of the stored color shifting amounts. Color shifting correction units C, M, Y, and K perform color shifting correction by converting coordinates upon reading out image data from bitmap memories C, M, Y, and K on the basis of the calculated color shifting correction amounts, and then perform tone correction. Data after tone correction undergo halftone processing by halftone processors. C, M, Y, and K. PWM processors C, M, Y, and K generate PWM signals for scanning, and output them to exposure units C, M, Y, and K of the respective image forming units.

    摘要翻译： 利用本发明，首先基于在每个图像形成单元的图像载体上指示相对于扫描方向的移动量的移动量信息执行颜色偏移校正，然后执行半色调处理，从而抑制由于 颜色偏移校正，并形成高质量的图像。 为此，图像形成引擎具有在图像形成中存储图像载体C，M，Y和K上的理想扫描方向的实际移动量的色移量存储单元C，M，Y和K（黑色） 单位C，M，Y和K.颜色偏移校正量运算单元C，M，Y和K基于存储的颜色偏移量计算各个颜色分量的颜色偏移校正量。 颜色偏移校正单元C，M，Y和K基于计算出的色移校正量从位图存储器C，M，Y和K读出图像数据，通过转换坐标进行色移校正，然后执行色调 更正。 色调校正后的数据通过半色调处理器​​进行半色调处理。 C，M，Y和K. PWM处理器C，M，Y和K产生用于扫描的PWM信号，并将其输出到各个图像形成单元的曝光单元C，M，Y和K.

    COLOR IMAGE FORMING APPARATUS
    9.
    发明申请
    COLOR IMAGE FORMING APPARATUS 有权
    彩色图像形成装置

    公开(公告)号：US20100079820A1

    公开(公告)日：2010-04-01

    申请号：US12603035

    申请日：2009-10-21

    申请人： Kenzo Tojima ,  Hiroki Kitamura ,  Yoshiyuki Akiba ,  Tsutomu Takata ,  Shuichi Nakamura ,  Yusuke Yamamoto ,  Masanao Motoyama ,  Takeshi Akiyama ,  Takaaki Nagaoka

    发明人： Kenzo Tojima ,  Hiroki Kitamura ,  Yoshiyuki Akiba ,  Tsutomu Takata ,  Shuichi Nakamura ,  Yusuke Yamamoto ,  Masanao Motoyama ,  Takeshi Akiyama ,  Takaaki Nagaoka

    IPC分类号： G06K15/00

    CPC分类号： H04N1/506 ,  H04N2201/04787

    摘要： A color image forming apparatus of a so-called tandem type which has image forming units in correspondence with colors is provided. In the color image forming apparatus, a color discrepancy amount storage unit stores information of a color discrepancy amount of each of the image forming units, which is measured in advance. A first color discrepancy correcting unit performs color discrepancy correction in a pixel unit by performing coordinate conversion of bitmap data to be printed based on the information of the color discrepancy amount stored in the color discrepancy amount storage unit. A second color discrepancy correcting unit performs color discrepancy correction in less than a pixel unit by performing tone correction of the bitmap data corrected by the first color discrepancy correcting unit based on the information of the color discrepancy amount stored in the color discrepancy amount storage unit.

    摘要翻译： 提供了具有与颜色相对应的图像形成单元的所谓串列型彩色图像形成装置。 在彩色图像形成装置中，颜色差异量存储单元存储预先测量的每个图像形成单元的颜色差异量的信息。 第一颜色差异校正单元通过基于存储在颜色差异量存储单元中的颜色差异量的信息执行要打印的位图数据的坐标转换来执行像素单元中的色差校正。 第二颜色差异校正单元通过基于存储在颜色差异量存储单元中的颜色差异量的信息执行由第一色差校正单元校正的位图数据的色调校正，以小于像素单元执行色差校正。