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Optical intelligent fingerprint identification method

An optical technology for fingerprint recognition, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems that light cannot penetrate the surface layer of the skin and cannot penetrate deep into the dermis, so as to achieve the effect of accuracy

Inactive Publication Date: 2009-01-14
SHANGHAI YAOMING INSTR CONTROL
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Problems solved by technology

[0003] In order to overcome the situation that the existing fingerprint identification system can only scan the surface of the finger skin, or scan the dead skin layer, but cannot go deep into the dermis because the light cannot penetrate the skin surface (dead skin layer), the present invention Provides a second-generation fingerprint identification method, the invention realizes the accuracy of an optical intelligent fingerprint identification method process

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  • Optical intelligent fingerprint identification method

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Embodiment Construction

[0008] In order to overcome the situation that the existing fingerprint recognition system can only scan the surface of the finger skin, or scan the dead skin layer, but cannot go deep into the dermis because light cannot penetrate the skin surface (dead skin layer), the present invention A second-generation fingerprint identification method is provided, and the invention realizes the accuracy of an optical fingerprint identification method process.

[0009] The processing of the whole system is divided into four steps:

[0010] (1) The fingerprint image output from the image sensor is first sent to the FPGA buffer, and at the same time, the designed preprocessing module is used to process the data to obtain the gradient value of each pixel point and the coordinates of the maximum point in the sub-block. All these data Together with the original data, it is stored in DDR SDRAM in burst mode;

[0011] (2) DSP reads all relevant data from DDR SDRAM through FPGA, calculates the ...

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Abstract

The invention provides a secondary-generation fingerprint identification method, aiming at overcoming the state that the existing optical fingerprint identification system can only scan the surface of finger skin or scan the dead skin layer, instead of penetrating into the dermal layer because light can not penetrate the surface of the skin (dead skin layer). The method realizes the accuracy of the process of the optical fingerprint identification method.

Description

technical field [0001] The patent of the present invention relates to an optical intelligent fingerprint identification method, in particular to realize the accuracy of the process of the optical intelligent fingerprint identification method. Background technique [0002] At present, it is known that under normal circumstances, the fingerprint identification technology can reliably confirm an identity by analyzing the local features of the fingerprint and extracting detailed feature points therefrom. Advantages of fingerprint identification As a unique feature of the human body, fingerprints can provide sufficient features for identification due to their complexity, and have extremely high security. Compared with other identity authentication technologies, fingerprint recognition is a more ideal identity authentication technology. Fingerprint recognition not only has many unique information security advantages, but more importantly, it has high practicability and feasibility...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 许丰
Owner SHANGHAI YAOMING INSTR CONTROL
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