Content delineation in document images

    公开(公告)号:US09798924B2

    公开(公告)日:2017-10-24

    申请号:US14827725

    申请日:2015-08-17

    CPC classification number: G06K9/00449 G06K9/4647 G06K9/527 G06K9/6857

    Abstract: Methods and apparatus delineate grouped together content in documents. Void and unvoid pixels in document images get clustered together. Execution of a histogram and autocorrelation function, including peak detection, against the unvoid clusters reveals the content. Techniques for clustering include iteratively transforming an original image into secondary images with a Haar wavelet transformation, for example. Clustering begins on a lowest image plane and advances to a next highest plane until all void and unvoid pixels in the images are grouped. Void clusters at lower levels remain void clusters at higher levels, thus only unvoid clusters of pixels require processing at higher levels thereby optimizing processing. Imaging devices with scanners define suitable hardware for transformation of the document into images and processors with executable code cluster together pixels to delineate content. Further processing includes executing OCR or other routines post void/unvoid analysis.

    CONCAVO-CONVEX FORMING APPARATUS, CONCAVO-CONVEX FORMING METHOD, AND PROGRAM

    公开(公告)号:US20170291427A1

    公开(公告)日:2017-10-12

    申请号:US15510376

    申请日:2015-09-24

    Inventor: Hideki Kubo

    Abstract: MTF characteristics of a concavo-convex forming apparatus change depending on the amount of amplitude of input data, the operation condition of the apparatus, etc., and therefore, it is not possible to form a concavo-convex shape with good characteristics only by applying the MTF correction technique widely known in the image processing field. A concavo-convex forming apparatus including an input unit configured to input concavo-convex data representing concavo-convex of an object to be printed, and a correction unit configured to perform correction in accordance with a plurality of frequency band of the input concavo-convex data and whose intensity is made higher for the larger amplitude on the input concavo-convex data based on frequency response characteristics in a case where concavo-convex is formed on a printing medium.

    Image Interpolation Method and Image Interpolation System
    10.
    发明申请
    Image Interpolation Method and Image Interpolation System 有权
    图像插值方法和图像插值系统

    公开(公告)号:US20160012566A1

    公开(公告)日:2016-01-14

    申请号:US14329991

    申请日:2014-07-14

    Abstract: An image interpolation method is utilized for performing an interpolation on a source image to obtain a destination image. The image interpolation method includes performing a domain transformation on a plurality of pixels of the source image to generate a plurality of first coefficients and a plurality of second coefficients; respectively determining an data interrelationship degree in at least one direction of each first coefficient to generate a plurality of direction results; performing a first interpolation process on the plurality of first coefficients according to the plurality of direction results to generate a plurality of first destination coefficients; performing a second interpolation process on the plurality of second coefficients to generate a plurality of second destination coefficients; performing a reverse domain transformation on the plurality of first destination coefficients and the plurality of second destination coefficients to obtain the destination image.

    Abstract translation: 利用图像插值方法对源图像进行插值以获得目的图像。 图像插值方法包括对源图像的多个像素执行域变换以生成多个第一系数和多个第二系数; 分别确定每个第一系数的至少一个方向上的数据相互关系度以产生多个方向结果; 根据所述多个方向结果对所述多个第一系数进行第一插值处理,以产生多个第一目的地系数; 对所述多个第二系数执行第二插值处理以生成多个第二目的地系数; 对所述多个第一目的地系数和所述多个第二目的地系数执行反向域变换以获得所述目的地图像。

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