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Table extracting method and apparatus

An extraction method, extraction equipment technology, applied in character and pattern recognition, instruments, computer parts, etc.

Inactive Publication Date: 2008-11-12
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, this method can only extract table areas containing straight lines

Method used

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  • Table extracting method and apparatus
  • Table extracting method and apparatus
  • Table extracting method and apparatus

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Embodiment Construction

[0034] The table extraction method and table extraction device of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, the pixel values ​​of the binarized image are defined as follows:

[0035] White dots: represent invalid pixels, that is, background pixels;

[0036] Black dots: represent effective pixels, that is, foreground pixels, such as pixels that form straight lines in the table area.

[0037] figure 1 A flowchart showing a table extraction method for extracting a table area from an electronic document image according to the present invention. As mentioned above, there are two kinds of tables on the document image: the first is a table with straight lines, and the other is a table without straight lines but with a colored or textured background. According to the table extraction method of the present invention, the first table is extracted by the distribution of straight lines on the origi...

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Abstract

The invention supplies a table extraction method in electronic document image. The method includes the following steps: inputting document image; detecting its background difference and extracting the area with color or texture to use as prepared table area; considering the literal distribution and identifying the prepared table area by projection tracing analysis method to confirm the table area. Thus it can extract the table area with color or texture, but without straight line in the electronic document image.

Description

technical field [0001] The present invention relates to a document image processing method and device, in particular to a table extraction method and device for segmenting a table area from a document image. Background technique [0002] Compared with paper documents, electronic documents have many advantages in storage, retrieval and modification, so a system that automatically converts paper documents into electronic documents is necessary. When processing electronic documents, it is beneficial for further processing to divide the document image into different regions such as graphics, tables, and text blocks. However, the extraction and processing of the table area is still a relatively difficult problem. [0003] Generally, there are two types of tables in a document: the first type of table is a table area that contains straight lines; the second type of table is a table with a colored or textured background that does not contain straight lines. [0004] At present, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/20
Inventor 欧文武郝瑛王刚王迟
Owner RICOH KK