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Automatic splicing method of regular shredded paper

An automatic splicing and shredding technology, applied in image data processing, instruments, calculations, etc., can solve problems such as large technical difficulties

Inactive Publication Date: 2014-12-03
JIANGSU UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, so far, in this technical field, the process of automatically splicing shredded paper images in the hope of obtaining the final high-quality wide-width shredded paper splicing has relatively large technical difficulties.

Method used

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  • Automatic splicing method of regular shredded paper
  • Automatic splicing method of regular shredded paper
  • Automatic splicing method of regular shredded paper

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Embodiment Construction

[0100] Taking Chinese single-sided as an example, the execution process of the present invention will be briefly described below. In this example, a total of 209 shredded paper images are selected, and these 209 shredded pieces are cut 10 times crosswise and 18 lengthwise on an A4 paper. The specific execution steps are as follows:

[0101] (1) Pretreatment

[0102] (a) Prepare and preprocess the image data set, including image digitization, denoising, and binarization;

[0103] (b) Arrange the scraps of paper into a matrix of 11 rows and 19 columns, numbered from 1 to 209 in order from left to right and from top to bottom;

[0104] (2) Extract the feature set of the fragment matrix, these features include: the position and gray value of the pixel point of the outermost layer of the fragment of paper, and the height of the upper boundary;

[0105] (3) Use the feature value to classify the fragments:

[0106] ① According to whether there is text and stroke information on th...

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Abstract

The invention belongs to an image processing technology and particularly relates to an automatic splicing method of regular shredded paper. The technical scheme of the invention is achieved through six steps of (1) preparing an image data set and preprocessing; (2) classifying the shredded paper according to Chinese and English as well as a single face and two faces; (3) extracting local regional characteristics of each image, such as a position and a grey level of a boundary pixel point of the shredded paper as well as an upper (lower) boundary height; enlarging an extraction range of the characteristics of the English shredded paper, wherein the supplementary features include a row height of the English shredded paper, a horizontal position of the English shredded paper and a vertical spacing of the English shredded paper; (4) reclassifying the shredded paper according to feature values extracted in the step (3); (5) carrying out local matching, line matching and column matching on the shredded paper; and (6) restoring the matched images. According to the automatic splicing method provided by the invention, a large amount of the shredded paper can be more accurately spliced.

Description

technical field [0001] The invention belongs to the application field of image processing technology, and in particular relates to an automatic splicing method of regular shredded paper. Background technique [0002] Shredded paper splicing technology is an important research branch of digital image processing technology. It is to spatially match and align a group of shredded papers that overlap with each other, so as to seamlessly stitch together to obtain a complete image of a wide-view scene. [0003] Shredded paper automatic splicing and restoration technology has important applications in the fields of judicial evidence restoration, historical document restoration, and military intelligence acquisition. In recent years, with the publication of the German Stasi Document Restoration Project, the research on shredded document recovery technology has attracted widespread attention. [0004] The key to the splicing of shredded paper is the matching technology of the fragmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/50
Inventor 段倩金鑫浦志强李医民朱峰
Owner JIANGSU UNIV
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