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    • 32. 发明授权
    • Image forming apparatus and image density detecting method
    • 图像形成装置和图像浓度检测方法
    • US08654419B2
    • 2014-02-18
    • US13415082
    • 2012-03-08
    • Susumu MiyazakiIzumi KinoshitaMotohiro KawanabeTakeshi ShikamaTakuhei YokoyamaTatsuya Miyadera
    • Susumu MiyazakiIzumi KinoshitaMotohiro KawanabeTakeshi ShikamaTakuhei YokoyamaTatsuya Miyadera
    • H04N1/46
    • H04N1/3878H04N1/407H04N1/409
    • An image forming apparatus performs pseudo gradation processing using dithering, and includes an image carrier; a plurality of light-emitting element arrays arranged in a main-scanning direction and including a plurality of light-emitting elements; an image forming unit performing lighting control of the arrays and forming a pattern image on the image carrier; a detecting unit detecting a density of the pattern image; a position detecting unit detecting a position in the main-scanning direction of the detecting unit with respect to the light-emitting element arrays; a determining unit that, based on the detected position, determines whether the detecting unit is positioned at a proper detection position with respect to the pattern image on which noise has no effect; and an operation control unit that, when the detecting unit is positioned at the proper detection position, performs an image density detection operation on the pattern image using the detecting unit.
    • 图像形成装置使用抖动进行伪灰度处理,并且包括图像载体; 沿主扫描方向排列并包括多个发光元件的多个发光元件阵列; 图像形成单元,对所述阵列执行点亮控制,并在所述图像载体上形成图案图像; 检测单元,检测图案图像的浓度; 位置检测单元,相对于所述发光元件阵列检测所述检测单元的主扫描方向的位置; 确定单元,其基于所检测的位置,确定所述检测单元是否位于相对于其上没有影响的图案图像的适当检测位置; 以及操作控制单元,当所述检测单元位于适当的检测位置时,使用所述检测单元对所述图案图像执行图像浓度检测操作。
    • 40. 发明申请
    • IMAGE FORMING APPARATUS AND IMAGE CORRECTION METHOD
    • 图像形成装置和图像校正方法
    • US20140146371A1
    • 2014-05-29
    • US14043258
    • 2013-10-01
    • Masayuki HAYASHITatsuya MiyaderaMotohiro KawanabeYoshinori ShirasakiMasatoshi Murakami
    • Masayuki HAYASHITatsuya MiyaderaMotohiro KawanabeYoshinori ShirasakiMasatoshi Murakami
    • H04N1/40
    • H04N1/506
    • Disclosed is an image forming apparatus including, at least, an image data storage unit that stores image data; an inclination amount detection unit that detects a first inclination amount of a portion of the image data spanning from one end to the other end relative to a main scanning direction; an inclination amount storage unit that stores, when a gradient of the image data changes at a point in the main scanning direction, a second inclination amount of a portion of the image data spanning from the one end to the point or from the other end to the point; a correction amount calculation unit that calculates correction amounts associated with the main scanning direction by switching, at the point, whether the first inclination amount is increased or decreased by the second inclination amount; and an image correction unit that corrects an image based on the correction amounts.
    • 公开了一种图像形成装置,至少包括存储图像数据的图像数据存储单元; 倾斜量检测单元,其相对于主扫描方向检测从一端到另一端跨越的图像数据的一部分的第一倾斜量; 倾斜量存储单元,当图像数据的梯度在主扫描方向上的点变化时,存储从一端到点或从另一端到另一端的图像数据的一部分的第二倾斜量, 点; 校正量计算单元,通过在第一倾斜量是否将第一倾斜量增加或减少第二倾斜量的情况下,来计算与主扫描方向相关联的校正量; 以及图像校正单元,其基于校正量来校正图像。