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Document comparison method based on image accurate correction

An image and document technology, applied in the field of image comparison, can solve the problems of inability to meet the needs of automatic document comparison, increase the comparison error rate, and high error rate, so as to reduce workload, avoid errors, and improve efficiency.

Pending Publication Date: 2019-12-24
NANJING HUANYIN ANTI COUNTERFEIT TECH CO LTD
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Problems solved by technology

[0002] At present, some enterprises have a large number of document comparison requirements, such as the comparison of contract content and bill content comparison. For standard text information in electronic documents, the method of character comparison can be used. However, if the electronic documents to be compared When there are many kinds of information such as text, pictures, tables, QR codes, etc., and the arrangement is staggered, using the method of character comparison will greatly increase the comparison error rate, which cannot meet the needs of automatic document comparison
In addition, if it is a paper document, it is necessary to convert the paper document into an electronic document through text recognition. During the conversion process, a large number of errors will also occur, resulting in a high error rate when comparing documents

Method used

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  • Document comparison method based on image accurate correction
  • Document comparison method based on image accurate correction
  • Document comparison method based on image accurate correction

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Embodiment 2

[0044] Embodiment 2 is as follows from Step AII-1 to Step AII-4.

[0045] Step AII-1. Convert the two documents into image formats according to the predetermined precision, obtain two electronic document images, and extract the information areas on the two electronic document images respectively, and then enter step AII-2 .

[0046] Step AII-2. For the information areas on the images of the two electronic documents, construct coordinate systems with the same relative positions, and then proceed to step AII-3.

[0047] Step AII-3. Based on the coordinate systems of the information areas on the two electronic document images, obtain the position information of each anchor point that is respectively located in the information areas of the two electronic document images and has the same size ratio and positional relationship with each other, such as figure 2 As shown, wherein, the acquisition of the location information of the anchor point includes the edge position located in t...

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Abstract

The invention relates to a document comparison method based on image accurate correction. The method converts a document to be compared into an image format, and compares the difference of the two images according to the pixel-level accuracy. The character recognition does not need to be carried out on the document, so that the errors generated during a character recognition process are avoided, and the accuracy of document comparison is greatly improved. In addition, the corresponding to-be-compared documents can be automatically selected from a large number of documents through the two-dimensional code identifiers, so that the workload of manually selecting the comparison documents is reduced, and the automation degree of document comparison is improved. Meanwhile, after document comparison, the difference information is visually marked in the documents for manual inspection, so that the document comparison efficiency, accuracy and automation degree are greatly improved.

Description

technical field [0001] The invention relates to a document comparison method based on precise image correction, which belongs to the technical field of image comparison. Background technique [0002] At present, some enterprises have a large number of document comparison requirements, such as the comparison of contract content and bill content comparison. For standard text information in electronic documents, the method of character comparison can be used. However, if the electronic documents to be compared When there are multiple information such as text, pictures, tables, QR codes, etc., and the arrangement is staggered, using the method of character comparison will greatly increase the comparison error rate, which cannot meet the needs of automatic document comparison. In addition, if it is a paper document, it is necessary to convert the paper document into an electronic document through text recognition. During the conversion process, a large number of errors will also ...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K7/14
CPCG06K7/1408G06V30/43G06V30/418Y02D10/00
Inventor 付强周宇欢
Owner NANJING HUANYIN ANTI COUNTERFEIT TECH CO LTD
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