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Fingerprint image enhancement method based on knowledge

A fingerprint image and image technology, applied in the field of fingerprint image enhancement processing, can solve problems such as finger peeling, system error, and difficult recovery

Inactive Publication Date: 2003-06-04
INST OF AUTOMATION CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These factors are fixed systematic errors that are relatively easy to recover from
On the other hand, it is also caused by the usual work and environment of the subject, such as peeled fingers, cuts, scars, marks, dirty, dry, wet fingers, etc., which are closely related to individual fingers and are difficult to recover

Method used

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  • Fingerprint image enhancement method based on knowledge
  • Fingerprint image enhancement method based on knowledge
  • Fingerprint image enhancement method based on knowledge

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Embodiment

[0123] We apply this method to the fingerprint image processing system designed and implemented by ourselves. The fingerprint image processing system developed by us is based on Window98 / 95, adopts object-oriented design method and software engineering specification, realizes with C++ language, and is an image processing and analysis system oriented to the field of fingerprint identification. This system has rich graphics and image processing and analysis functions, not only has perfect two-dimensional image processing and analysis functions, but also can dynamically load various fingerprint recognition algorithms. The system provides a series of functions such as image input, image storage, image processing, algorithm loading, file conversion, and FVC testing tools.

[0124] The following is the specific implementation process of the fingerprint enhancement algorithm based on image filtering. The test data is the database of FVC2000, and the resolution is 300×300×256.

[01...

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Abstract

The fingerprint image enhancement method based on knowledge includes the steps: image pre-treatment; direction field estimation to calcualte the direction of each pixel in fingerprint image; binarization to change fingerprint image into black-white image according to pixel direction; fining the binary image; detail post-treatment to eliminate burr, spot and bridge in fined image to avoid pseudo detail; feedback enhacement with the knowledge rules; and extracting detail points including crest line end points. The said technology can be used to extract the details in fingerprint image and has important application value in biological recognition.

Description

technical field [0001] The invention relates to pattern recognition, in particular to a method of utilizing image filtering and knowledge of direction field to realize enhanced processing of fingerprint image. Background technique [0002] In the 1960s, with the continuous advancement of computer technology and information processing and identification technology, people began to use computers to process fingerprints, and launched automatic fingerprint identification systems (Automated Fingerprint Identification System, referred to as AFIS) in many countries around the world. Research and application in law enforcement. In the 1990s, with the further development of computer and pattern recognition technology, the application of automatic fingerprint recognition is no longer limited to the field of law and public security. It can be used as a means for computers to confirm users, and can also be used as an information security technology for accessing network resources. . I...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/36
Inventor 田捷张晓鹏常红星蒋永实
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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