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公开(公告)号：EP3182365A3
公开(公告)日：2017-09-20
申请号：EP16196685.8
申请日：2016-11-01
发明人： FANG, Gang
CPC分类号： G06K9/00422 , G06K9/4604 , G06K9/52 , G06K9/6218 , G06T3/40 , G06T5/006 , G06T7/13 , G06T7/194 , G06T2207/20112 , G06T2207/20164
摘要： A method for image processing, including: obtaining an image including a writing board and a background external to the writing board; detecting a plurality of lines within the image; determining, based on the plurality of lines, a plurality of corners of the writing board within the image; and correcting a perspective of the writing board by applying a transformation to the image based on the plurality of corners.
摘要翻译： 一种图像处理方法，包括：获取包括书写板和书写板外部背景的图像; 检测图像内的多条线; 基于所述多条线确定所述图像内的书写板的多个角部; 以及通过基于所述多个角对所述图像应用变换来校正所述书写板的视角。
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公开(公告)号：EP3182365A2
公开(公告)日：2017-06-21
申请号：EP16196685.8
申请日：2016-11-01
发明人： FANG, Gang
CPC分类号： G06K9/00422 , G06K9/4604 , G06K9/52 , G06K9/6218 , G06T3/40 , G06T5/006 , G06T7/13 , G06T7/194 , G06T2207/20112 , G06T2207/20164
摘要： A method for image processing, including: obtaining an image including a writing board and a background external to the writing board; detecting a plurality of lines within the image; determining, based on the plurality of lines, a plurality of corners of the writing board within the image; and correcting a perspective of the writing board by applying a transformation to the image based on the plurality of corners.
摘要翻译： 一种用于图像处理的方法，包括：获得包括书写板和写入板外部的背景的图像; 检测所述图像内的多条线; 基于所述多个线，确定所述书写板在所述图像内的多个角部; 以及通过基于所述多个拐角对所述图像应用变换来校正所述书写板的透视图。
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4.发明公开
公开(公告)号：EP3002712A3
公开(公告)日：2016-05-11
申请号：EP15179577.0
申请日：2015-08-03
发明人： FANG, Gang
CPC分类号： G06F17/24 , G06K9/00449 , G06K9/38 , G06K9/4638 , G06K9/4642
摘要： A vertical and horizontal line detection method for document images includes generating multiple binary images from the input grayscale document image based on multiple binarization thresholds, detecting horizontal and vertical lines in each of the multiple binary images independently, and merging the detection results from the multiple binary images. The line detection process for each binary image include applying an opening operation using a vertical or horizontal line as the structuring element, and removing connected components that are not vertical or horizontal lines based on a stroke width analysis. The boundaries of the detected lines are obtained using horizontal and vertical projections.
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5.发明公开
公开(公告)号：EP3002712A2
公开(公告)日：2016-04-06
申请号：EP15179577.0
申请日：2015-08-03
发明人： FANG, Gang
CPC分类号： G06F17/24 , G06K9/00449 , G06K9/38 , G06K9/4638 , G06K9/4642
摘要： A vertical and horizontal line detection method for document images includes generating multiple binary images from the input grayscale document image based on multiple binarization thresholds, detecting horizontal and vertical lines in each of the multiple binary images independently, and merging the detection results from the multiple binary images. The line detection process for each binary image include applying an opening operation using a vertical or horizontal line as the structuring element, and removing connected components that are not vertical or horizontal lines based on a stroke width analysis. The boundaries of the detected lines are obtained using horizontal and vertical projections.
摘要翻译： 用于文档图像的垂直和水平线条检测方法包括基于多个二值化阈值从输入灰度文档图像生成多个二值图像，独立地检测多个二值图像中的每一个中的水平线和垂直线，并且合并来自多个二进制的检测结果 图片。 针对每个二值图像的线检测处理包括：使用垂直线或水平线作为结构元素来应用打开操作，并且基于笔划宽度分析来移除不是垂直线或水平线的连接部件。 检测线的边界是使用水平和垂直投影获得的。
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