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Differential operation based high-precision palm print recognition method

A palmprint recognition and differential operation technology, applied in character and pattern recognition, computing, computer parts, etc., can solve the problems of expensive iris acquisition equipment, difficulty in extracting detail point features, and insufficient precision.

Inactive Publication Date: 2008-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to extract fine point features from unclear fingerprint images, and the price of iris collection equipment is quite expensive
The accuracy of some other biometrics, such as face, voice, signature, etc. is not high enough

Method used

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  • Differential operation based high-precision palm print recognition method
  • Differential operation based high-precision palm print recognition method
  • Differential operation based high-precision palm print recognition method

Examples

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Embodiment Construction

[0039] The following examples describe the present invention in more detail:

[0040] 1. Due to the irregular size and direction of the palmprint image, the palmprint image should be preprocessed first.

[0041] Since several small pillars used to limit the translation and rotation of the palm are installed on the CCD-based palmprint collection instrument, these pillars separate the fingers and form two holes between the index finger and the middle finger, the ring finger and the little finger. Using ["Online Palmprint Recognition", IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 25, No. 9, pp. 1041-1050, 2003. D. Zhang, W. Kong, J. You, and M. Wong, "Online palmprint identification," IEEE Trans. Pattern Anal. Machine Intell., vol.25, no.9, pp.1041-1050, 2003.] Describes preprocessing techniques to normalize palmprint images. This technique rectifies the image by computing the tangent of these two holes in the palmprint image. Then crop a rectangular im...

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Abstract

This invention provides one accurate palm line identification method based on differentiating computation, which comprises the following steps: a, palm image pre-processing; b, extracting characteristic and establishing palm differentiation codes PDC; palm matching. This invention describes image grey degree change through differentiating computation, which uses two dimensional Gauss filter to slide palm image and the processing two differentiating computation of the sliding image and finally coding positive and negative characters according to differentiating result.

Description

(1) Technical field [0001] The invention relates to a high-precision identity recognition method, in particular to a palmprint-based identity recognition method. (2) Background technology [0002] In today's information society, the importance of automatic identification with the help of computers is increasing, and biometric technology is the most important and reliable method in this field. Among the existing biometric technologies, fingerprint recognition is the most widely used, and iris recognition has the highest reliability. However, it is very difficult to extract minutiae features from unclear fingerprint images, and the price of iris collection equipment is quite expensive. Some other biometrics, such as face, voice, signature, etc., are not accurate enough. Palmprint recognition is an emerging biometric technology, which has many unique advantages: like fingerprints, the palm is also covered with papillae, but the area of ​​the palm is much larger than that of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
Inventor 邬向前张大鹏王宽全
Owner HARBIN INST OF TECH