Fingerprint identification device and method with prompt information

A fingerprint recognition and prompt information technology, applied in the field of image processing, can solve the problems of inability to feedback fingerprint information is unclear or improper operation, unable to correct the user's finger placement, etc., to achieve the effect of improving the success rate and improving the evaluation efficiency.

Inactive Publication Date: 2013-04-24
JIANGSU CHAOCHUANG INFORMATION SOFTWARE DEV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Its defect is: the fingerprint reader has no Chinese character prompt information, and when the fingerprint information is unclear or improperly operated, it cannot correct the placement of the user's finger, and cannot feedback the reasons for the unclear fingerprint information or improper operation

Method used

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  • Fingerprint identification device and method with prompt information
  • Fingerprint identification device and method with prompt information

Examples

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Embodiment Construction

[0024] The present invention collects the fingerprint image of the human body through the fingerprint identification device with prompt information, performs initial evaluation on the acquired fingerprint image, evaluates whether the input fingerprint information is valid, and prompts the evaluation result. The prompt information includes "correct", "finger too Wet", "Finger is too dry", "Fingerprint is left", "Finger is right", "Finger is up", "Finger is down", "Please change finger", etc. details as follows:

[0025] see figure 2 , the present invention has the fingerprint identification device of prompt information to comprise security controller 209, and security controller 209 is respectively connected with Chinese character display screen 201, fingerprint sensor 202, JTAG debugging interface 203, reset circuit 204, FLASH program memory 205, external SRAM data memory 206 , SQI high-speed interface 207 and USB interface 208 . The power management module 210 provides pow...

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Abstract

The invention discloses a fingerprint identification device and a fingerprint identification method with prompt information. The method comprises the steps of sampling a fingerprint grayscale image in a dot interlace mode, and representing a local texture direction of the dot interlace at each pixel point in the original fingerprint grayscale image by using a point direction map; dividing the point direction map into blocks, and dividing each block into a foreground block or a background block; calculating a ratio of the active area of the foreground map to the area of the whole image, performing image quality analysis if the active area meets the requirements, calculating a ratio of the advantage direction area to the fingerprint foreground area if each point in the foreground image block has direction advantages; performing finger arrangement position analysis if the image is preliminarily determined to be qualified; and if the finger arrangement position is inaccurate, performing finger position deviation analysis, and if the image is unqualified, performing fingerprint dryness / humidity analysis. When the fingerprint is not clear or the operation is improper, the Chinese character prompt information is adopted, the finger arrangement position deviation and finger dryness / humidity conditions can be accurately judged, and the success rate of fingerprint identification is improved.

Description

technical field [0001] The invention relates to image processing technology, in particular to a fingerprint identification device and method, including image acquisition, image preprocessing, image digital processing analysis, pattern recognition and other technical fields. Background technique [0002] At present, the improvement of fingerprint recognition technology and equipment mainly focuses on the optimization of image acquisition method, fingerprint image processing algorithm, improvement of fingerprint recognition rate, and the extraction of fingerprint information as digital watermark embedded in files for encryption applications, etc., but in practice In the application, there is often a phenomenon that the fingerprint input information cannot be correctly identified and the fingerprint information does not match. If there is a Chinese character prompt message during fingerprint input, and the correct operation according to the prompt information can improve the fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 赵民陈祖爵陈潇君司哲琳郭恺严京城刘小强吴薇柯佳
Owner JIANGSU CHAOCHUANG INFORMATION SOFTWARE DEV
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