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1. 发明公开

EP2178028A3 Representing documents with runlength histograms 审中-公开
标题翻译：与游程直方图文件标记
公开(公告)号：EP2178028A3
公开(公告)日：2013-11-27
申请号：EP09172491.4
申请日：2009-10-08
申请人： Xerox Corporation
发明人： Perronnin, Florent , Cramet, Damien , Ragnet, Francois
IPC分类号： G06K9/20 , G06K9/46 , G06K9/62
CPC分类号： G06K9/00442 , G06K9/4642 , G06K2209/01
摘要： An apparatus and method are provided for generating a representation of an image which may be used in tasks such as classification, clustering, or similarity determination. An image, such as a scanned document, in which the pixel colorant values are quantized into a plurality of colorant quantization levels, is partitioned into regions, optionally at a plurality of different scales. For each region, a runlength histogram is computed, which may be a combination of sub-histograms for each of the colorant quantization levels and optionally each of plural directions. The runlength histograms, optionally normalized, can then be combined to generate a representation of the document image.

2. 发明公开

EP2178028A2 Representing documents with runlength histograms 审中-公开
标题翻译： Kennzeichnen von Dokumenten mitLauflängenhistogrammen
公开(公告)号：EP2178028A2
公开(公告)日：2010-04-21
申请号：EP09172491.4
申请日：2009-10-08
申请人： Xerox Corporation
发明人： Perronnin, Florent , Cramet, Damien , Ragnet, Francois
IPC分类号： G06K9/20
CPC分类号： G06K9/00442 , G06K9/4642 , G06K2209/01
摘要： An apparatus and method are provided for generating a representation of an image which may be used in tasks such as classification, clustering, or similarity determination. An image, such as a scanned document, in which the pixel colorant values are quantized into a plurality of colorant quantization levels, is partitioned into regions, optionally at a plurality of different scales. For each region, a runlength histogram is computed, which may be a combination of sub-histograms for each of the colorant quantization levels and optionally each of plural directions. The runlength histograms, optionally normalized, can then be combined to generate a representation of the document image.
摘要翻译：提供了一种用于生成可用于诸如分类，聚类或相似性确定的任务中的图像的表示的装置和方法。将像素着色剂值量化为多个着色剂量化级别的诸如扫描文档的图像可选地分成多个不同的尺度。对于每个区域，计算游程长度直方图，其可以是针对着色剂量化级别中的每一个和多个方向中的任意一个的子直方图的组合。然后，可选地归一化的游程长度直方图可以被组合以生成文档图像的表示。

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