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    • 23. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20100157375A1
    • 2010-06-24
    • US12638475
    • 2009-12-15
    • Ayumu MurakamiMasaru UsamiDaisuke Morikawa
    • Ayumu MurakamiMasaru UsamiDaisuke Morikawa
    • G06T5/00G06K9/46
    • H04N1/40006G03G15/23G03G15/5025G03G2215/00202G03G2215/00303G03G2215/00586G06T5/008G06T2207/30201H04N1/4076H04N1/4095
    • The image forming apparatus includes first and second reading portions which read images of first and second faces of an original, an image forming portion which forms an image on a sheet based on image data read by the reading portions, a calculation portion which calculates difference between respective image data, a correction portion which calculates correction data to decrease difference of the image data based on the image data difference, and a control portion which controls the image forming portion so that an image for correction to correct the reading accuracy difference is formed on a sheet based on the correction data; and the calculation portion calculates difference between respective image data when the image for correction formed on a sheet is respectively read by the first and second reading portions, and the correction portion recalculates correction data based on the image data difference calculated by the calculation portion.
    • 图像形成装置包括读取原稿的第一和第二面的图像的第一和第二读取部分,基于由读取部分读取的图像数据在片材上形成图像的图像形成部分,计算部分,其计算 相应的图像数据,校正部分,其基于图像数据差计算校正数据以减小图像数据的差异;以及控制部分,其控制图像形成部分,使得校正图像以校正读取精度差异形成在 基于校正数据的纸张; 并且所述计算部分计算由所述第一和第二读取部分分别读取形成在片材上的校正图像时的各个图像数据之间的差异,并且所述校正部分基于由所述计算部分计算出的图像数据差重新计算校正数据。
    • 24. 发明授权
    • Image reading apparatus and image reading method
    • 图像读取装置和图像读取方法
    • US07729023B2
    • 2010-06-01
    • US11857534
    • 2007-09-19
    • Daisuke Morikawa
    • Daisuke Morikawa
    • G03F3/08H04N1/60H04N1/40H04N1/00G06K9/40
    • H04N1/203H04N1/00002H04N1/00013H04N1/00031H04N1/00045H04N1/00053H04N1/00063H04N1/00087H04N1/12H04N1/193H04N2201/0081
    • An image reading apparatus which is capable of preventing images read from a double-sided original from suffering an in-surface color irregularity on each of images read from the respective opposite sides of a double-sided original and a color difference between the front and reverse. A CCD line sensor reads a front-side original image. An image processing ASIC calculates shading correction data for performing shading correction on original image data read from the original image by the CCD line sensor, based on read luminance values obtained by the CCD line sensor by reading a plurality of halftone gradation patches thereon on a correction chart. The shading correction data calculated by the image processing ASIC is corrected based on read luminance values associated, respectively, with at least two of the gradation patches.
    • 一种图像读取装置,其能够防止从双面原稿读取的图像在从双面原稿的各个相对侧读取的每个图像上的表面内颜色不均匀性以及正面和反面之间的色差 。 CCD线传感器读取正面原始图像。 图像处理ASIC基于通过CCD线传感器获得的读取亮度值,通过在校正上读取多个半色调灰度片,从而计算用于对CCD线传感器从原始图像读取的原始图像数据进行阴影校正的阴影校正数据 图表。 基于图像处理ASIC计算出的阴影校正数据,基于分别与至少两个灰度片相关联的读亮度值来校正。
    • 27. 发明申请
    • IMAGE READING APPARATUS AND IMAGE READING METHOD
    • 图像读取装置和图像读取方法
    • US20080068682A1
    • 2008-03-20
    • US11857534
    • 2007-09-19
    • Daisuke Morikawa
    • Daisuke Morikawa
    • G03F3/00
    • H04N1/203H04N1/00002H04N1/00013H04N1/00031H04N1/00045H04N1/00053H04N1/00063H04N1/00087H04N1/12H04N1/193H04N2201/0081
    • An image reading apparatus which is capable of preventing images read from a double-sided original from suffering an in-surface color irregularity on each of images read from the respective opposite sides of a double-sided original and a color difference between the front and reverse. A CCD line sensor reads a front-side original image. An image processing ASIC calculates shading correction data for performing shading correction on original image data read from the original image by the CCD line sensor, based on read luminance values obtained by the CCD line sensor by reading a plurality of halftone gradation patches thereon on a correction chart. The shading correction data calculated by the image processing ASIC is corrected based on read luminance values associated, respectively, with at least two of the gradation patches.
    • 一种图像读取装置,其能够防止从双面原稿读取的图像在从双面原稿的各个相对侧读取的每个图像上的表面内颜色不均匀性以及正面和反面之间的色差 。 CCD线传感器读取正面原始图像。 图像处理ASIC基于通过CCD线传感器获得的读取亮度值,通过在校正上读取多个半色调灰度片,从而计算用于对CCD线传感器从原始图像读取的原始图像数据进行阴影校正的阴影校正数据 图表。 基于图像处理ASIC计算出的阴影校正数据,基于分别与至少两个灰度片相关联的读亮度值来校正。