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    • 117. 发明公开
    • Method for detecting perforation on the edge of an image of a form
    • Verfahren zur Erkennung von Perforationen an der Kante eines Formularbildes
    • EP1791081A1
    • 2007-05-30
    • EP06024118.9
    • 2006-11-21
    • Pitney Bowes, Inc.
    • Cordery, Robert A.Campagna, Matthew J.Foth, Thomas J.Haas, BertrandQuine, Douglas B.
    • G06K9/52G07D7/06G06K9/20
    • G06K9/522G06K9/2054G07D7/185Y10S209/90
    • A method for detecting whether perforations are present on the edge of an image of a form, such as a check, includes obtaining (100) a bitmap of the image, identifying (105) a selected portion of the bitmap that corresponds to at least the edge and that includes a matrix of a plurality of rows and columns of brightness values, and selecting (110) a particular one of the rows of brightness values. The method further includes performing (115) a Fourier transform of the brightness values included in the particular selected row to generate a Fourier transform output, and determining (120) whether a series of perforations is present based on the Fourier transform output. The method may also include steps wherein the brightness values are low pass filtered and wherein the values in the selected row are high pass filtered prior to the step of performing a Fourier transform
    • 一种用于检测穿孔是否存在于诸如检查的形式的图像的边缘上的方法包括获得(100)图像的位图,识别(105)至少对应于图像的位图的选定部分 并且其包括多个亮度值的行和列的矩阵,并且选择(110)亮度值的行中的特定行之一。 该方法还包括对包括在特定选定行中的亮度值执行(115)傅立叶变换以产生傅立叶变换输出,以及基于傅里叶变换输出确定(120)是否存在一系列穿孔。 该方法还可以包括其中亮度值被低通滤波的步骤,并且其中所选择的行中的值在执行傅立叶变换的步骤之前被高通滤波