Seal imprint image search method of circular stamp

A technology of image retrieval and stamping, which is applied in the direction of instruments, calculations, electrical digital data processing, etc., and can solve problems such as long time

Inactive Publication Date: 2008-04-16
PEKING UNIV
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Problems solved by technology

However, before this process, the corresponding reference chapter of the input stamp image is usually manually found, and each reference chapter is equipped with a very long ID, and it is necessary to input these ID numbers one by one to obtain the required reference chapter. a long time
And this manual process has just become the technical bottleneck of the automatic seal identification system

Method used

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  • Seal imprint image search method of circular stamp
  • Seal imprint image search method of circular stamp
  • Seal imprint image search method of circular stamp

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Embodiment Construction

[0043] With reference to Fig. 1, the seal image retrieval method of circular seal of the present invention comprises the steps:

[0044] 1. Extract the main text area of ​​the seal.

[0045] The round conventional seals can be divided into two types, as shown in Figure 2, one type is the seal (a) with other Chinese characters in addition to the main text area. a processing stage. One category is that all Chinese characters on the seal belong to the main text area (b).

[0046] The circular conventional stamp is limited by its shape, which is not conducive to directly entering the next step of processing. The first step of the present invention is to expand the binarized circular stamp image into a rectangle along a radius. For the obtained rectangular graphics, it is also necessary to use the main text layout feature of the circular conventional seal to remove the noise or other non-main text areas formed by the seal boundary, and arrange the main text in order from left to ...

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Abstract

The invention provides a seal image retrieval method of the round signet and belongs to the signet image automatic retrieval technical field, wherein, the method includes the following steps: the main character area of a signet is picked up and the main characters of the signet is divided; single character feature of the main characters is picked up; a reference signet database is created by means of the information of the main characters; moreover, a signet image is input to be matched with the reference signet in the reference signet database, thereby realizing automatic retrieval of the reference signet corresponding to the input signet image. The invention solves the bottleneck problem of the prior signet authentication system, i.e. labor and time loss caused by the unavoidable manual ID input phase; meanwhile, the Chinese character recognition method which is provided by the invention is not influenced by blurry and incomplete Chinese character and can obtain results of high correct rate.

Description

technical field [0001] The invention belongs to the technical field of seal image automatic retrieval, and in particular relates to a seal image retrieval method of a circular seal. Background technique [0002] In many eastern countries, tens of thousands of seal images need to be identified every day. During these authentication processes, the system verifies the authenticity of an input stamp image by comparing it with its reference stamp. However, before this process, the corresponding reference chapter of the input stamp image is usually manually found, and each reference chapter is equipped with a very long ID, and it is necessary to input these ID numbers one by one to obtain the required reference chapter. a long time. And this manual process has just become the technical bottleneck of the automatic seal identification system. Contents of the invention [0003] The object of the present invention is to provide a seal image retrieval method of a circular seal, by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F17/30
Inventor 刘宏陆叶吴奇刘凡
Owner PEKING UNIV
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