Image checking code generating method based on invertible matrix

A picture verification code and picture technology, applied in the information field, can solve the problems that the picture verification code is easy to be cracked, and it is not easy to understand the picture correctly.

Inactive Publication Date: 2010-11-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing picture verification code is easy to be cracked, and it is not easy to understand the content of the picture correctly.

Method used

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  • Image checking code generating method based on invertible matrix
  • Image checking code generating method based on invertible matrix
  • Image checking code generating method based on invertible matrix

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] specific, figure 1 It is a flow chart of a method for generating an irreversible matrix-based image verification code in an embodiment of the present invention, including:

[0022] S101: selection of transformation type and generation of irreversible matrix;

[0023] Image transformation mainly includes translation, scaling and rotation. For a certain point (x, y) on the picture, the translation transformation of (Δx, Δy) can be achieved by implementing th...

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Abstract

The embodiment of the invention discloses an image checking code generating method based on an invertible matrix. The method comprises the following steps of selecting a conversion type, generating the invertible matrix, performing invertible converting of an image, adding random noise on the image, and combining a plurality of conversion images. By implementing the embodiment of the invention, the anticrack property of the image is improved, and the accuracy rate of understanding the image by people can not be reduced.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a method for generating a picture verification code based on an irreversible matrix. Background technique [0002] In today's Internet, various attacks, deceptions, and impersonation are flooding the entire Internet. Hackers can use robot programs to automatically register, log in, post, etc., posing a serious threat to Internet security. The picture verification code is a way to prevent such incidents from happening, preventing it from being cracked by violence. In fact, using picture verification codes is a common way for many websites, such as China Merchants Bank's online personal banking, Tencent's QQ community, etc. The so-called verification code is to generate a picture with a series of randomly generated numbers or symbols, add some interference pixels (to prevent OCR) in the picture, let the user identify the verification code information with the naked eye, ente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G06T5/00
Inventor 李春景罗笑南曾巨泉
Owner SUN YAT SEN UNIV
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