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A Recovery Analysis Method for Broken Documents Printed on Both Sides of English Printed Text

An analysis method and double-sided printing technology, applied to computer parts, character and pattern recognition, instruments, etc., can solve problems such as low efficiency and manual splicing to complete tasks

Active Publication Date: 2018-10-09
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, splicing and restoration work has to be done manually, with high accuracy but low efficiency
Especially when the number of fragments is huge, it is difficult for manual splicing to complete the task in a short time

Method used

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  • A Recovery Analysis Method for Broken Documents Printed on Both Sides of English Printed Text
  • A Recovery Analysis Method for Broken Documents Printed on Both Sides of English Printed Text
  • A Recovery Analysis Method for Broken Documents Printed on Both Sides of English Printed Text

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Experimental program
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Embodiment Construction

[0079] Such as Figure 1-3 Shown, the present invention is described in detail below in conjunction with example:

[0080] S1 image preprocessing

[0081] Segment the picture and divide the picture into a grid in units of pixels. There are 256 gray values ​​in total. When the gray value is 0, it is black, and when the gray value is 255, it is white. Convert the image into a gray value matrix to complete the acquisition of sample data. The recognition of black and white can be completed through the gray value matrix.

[0082] Establishment of S2 two-dimensional matching degree model

[0083] According to the distance from the median line of a word or letter to the bottom of the fragment

[0084]

[0085]

[0086] pair fragment x i and fragment x j to match.

[0087] Calculate the median line matching difference degree of all word lines in the whole fragment as

[0088]

[0089] For continuous M′ from top to bottom bb The definition of weights for successful ma...

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Abstract

A recovery and analysis method for an English printed double-sided printing broken file comprises the steps of preprocessing an image, wherein the image needs to be divided for obtaining sample data and mesh generation is carried out on the image with the pixel as the unit; building a two-dimensional matching degree model, wherein xi is defined as a fixed fragment located on the left side when two fragments are spliced, the distance between the median line of one letter and the bottoms of the fragments is defined according to the symmetry of the vertical distance of the letter and the Chinese character in order to obtain a unified metric, the continuous butt joint matching continuity degree of edge black cells of the fragments is defined, and the upward matching direction and the leftward matching direction exist in the two-dimensional matching process; building a two-dimensional black and white butt joint matching model, wherein a transverse butt joint single-row matching degree and a longitudinal butt joint single-column matching degree are defined; optimizing a two-dimensional matching model algorithm; carrying out synthetic clustering of a two-dimensional matching problem and defining a matching degree function; classifying large fragment collections based on characteristics of the obverse side and the reverse side; checking a result based on the characteristics of the obverse side and the reverse side.

Description

technical field [0001] The invention relates to a restoration and analysis method for double-sided printed broken documents of English printed characters, which belongs to the field of digital image processing and pattern recognition. Background technique [0002] The splicing of broken documents has important applications in the fields of judicial evidence recovery and identification, historical document restoration, fault analysis, and military intelligence acquisition. In recent years, the research on recovery technology of shredded documents has aroused people's widespread attention. Traditionally, splicing and restoration work has to be done manually, with high accuracy but low efficiency. Especially when the number of fragments is huge, it is difficult for manual splicing to complete the task in a short time. With the development of computer technology, there are many research strategies on fragment restoration. The mainstream solution is to combine manual restoratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/20G06K9/34
Inventor 赵旭程维虎王云帆刘爽胡云升张洋赵天宇
Owner BEIJING UNIV OF TECH
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