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Iris image perspective correction method and apparatus, and mobile terminal

An iris image, perspective correction technology, applied in character and pattern recognition, instruments, acquisition/recognition of eyes and other directions, can solve the problems of inapplicable real-time requirements, fixed position, large amount of calculation, etc., to facilitate identification processing, improve Accuracy, fast correction of the effect of transformations

Active Publication Date: 2016-12-21
徐鹤菲
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Problems solved by technology

Obviously, this method requires that enough and stable feature points can be easily detected in the image, and it is also sensitive to external lighting conditions and interference.
For different facial regions, it is difficult to reliably obtain feature points at fixed positions, and the amount of calculation is large, which is not suitable for the real-time requirements of mobile terminal iris applications

Method used

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  • Iris image perspective correction method and apparatus, and mobile terminal
  • Iris image perspective correction method and apparatus, and mobile terminal
  • Iris image perspective correction method and apparatus, and mobile terminal

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Embodiment Construction

[0040] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] figure 1 A schematic diagram is constructed for a mobile terminal 100 according to an embodiment of the present invention. like figure 1 As mentioned above, the mobile terminal 100 includes: a memory interface 102 , one or more data processors, image processors and / or a central processing unit 104 , and a peripheral interface 106 . Memory interface 102, one or more processors 104, and / or peripheral interface 106 may be di...

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Abstract

The invention discloses an iris image perspective correction method, and is applied to execution in a mobile terminal. The method comprises the following steps: obtaining an original iris image of a user to be identified; calculating three-dimensional space coordinates ps' of each point in the original iris image; according to a human eye iris and position information of the original iris image, obtaining an included angle theta between a visual direction of human eyes and a horizontal direction when the original iris image is obtained; according to the angle theta, constructing a transformation matrix of iris image perspective correction; and according to the transformation matrix, performing coordinate transformation on the three-dimensional space coordinates ps' of the original iris image so as to obtain a three-dimensional space coordinates ps of the iris image after the correction. The invention further discloses an iris image perspective correction apparatus and a mobile terminal.

Description

technical field [0001] The present invention relates to the field of image processing and pattern recognition, and more specifically, to a method, device and mobile terminal for iris image perspective correction. Background technique [0002] With the rapid development of smart mobile terminals and network technology, people's requirements for the security and stability of information, especially personal information, are constantly increasing, and the application of identity authentication using people's inherent unique physiological or behavioral characteristics is becoming more and more extensive. Among them, in addition to fingerprint recognition, face recognition and other technologies, another more secure iris recognition technology is also increasingly favored by people. Moreover, with the continuous advancement of technology, iris recognition systems are gradually applied to small, light, and portable electronic devices such as mobile phones, tablets, and notebooks. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/193G06V40/18
Inventor 王晓鹏郭岩松
Owner 徐鹤菲
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