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    • 6. 发明授权
    • Image reading apparatus and method
    • 图像读取装置及方法
    • US06718071B2
    • 2004-04-06
    • US09949788
    • 2001-09-12
    • Mitsuhiro YoshidaTamio AmagaiNoriaki YamazakiHiroyuki MaruyamaTakeshi Kimura
    • Mitsuhiro YoshidaTamio AmagaiNoriaki YamazakiHiroyuki MaruyamaTakeshi Kimura
    • G06K936
    • G06K9/3283H04N1/00681H04N1/00718H04N1/00737H04N1/00745H04N1/0075
    • The invention provides an image reading apparatus and method capable of performing skew error correction at high speed. In an image reading apparatus that conveys a stacked medium along a conveyance path, reads an image of the medium being conveyed, and discharges the medium after reading the image, the apparatus comprises calculation means for calculating the amount of skew of the medium while being conveyed, and correction means for correcting the amount of skew of the medium in accordance with the amount of skew calculated by the calculation means. The correction means comprise determination means for determining whether correction for the amount of skew should be performed or not, and control means for correcting the amount of skew of the medium. The calculation means comprise medium detection means for detecting the state of the medium conveyed along the conveyance path, and calculate the amount of skew from the detected result of the state of the medium. The control means comprise correction control means for correcting the amount of skew based on the amount of skew of the medium calculated by the calculation means when the determination means determine to correct the amount of skew. The calculation means comprise image reading means for reading an image of the medium conveyed along the conveyance path at a position closer on the conveyance path to the discharging side than the medium detection means, and calculate the amount of skew from the image data of the medium read by the image reading means.
    • 本发明提供能够高速进行偏斜纠错的图像读取装置和方法。 在沿输送路径输送堆叠介质的图像读取装置中,读取正在输送的介质的图像,并且在读取图像之后对介质进行放电,该装置包括计算装置,用于在传送介质的同时计算介质的歪斜量 以及校正装置,用于根据由计算装置计算的偏斜量来校正介质的偏斜量。 校正装置包括确定装置,用于确定是否应执行对偏斜量的校正;以及控制装置,用于校正介质的偏斜量。 计算装置包括用于检测沿着传送路径传送的介质的状态的介质检测装置,并根据检测到的介质状态的结果来计算偏斜量。 控制装置包括校正控制装置,用于当确定装置确定校正歪斜量时,基于由计算装置计算的介质的偏斜量来校正偏斜量。 计算装置包括图像读取装置,用于读取在比介质检测装置更靠近到排出侧的输送路径的位置处沿着传送路径传送的介质的图像,并且根据介质的图像数据计算偏斜量 由图像读取装置读取。