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Face recognition method of access control system

An access control system and face recognition technology, which is applied in the face recognition field of access control systems to achieve the effect of improving recognition efficiency and accuracy and improving practicability

Inactive Publication Date: 2018-02-23
SUZHOU DACHENG ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Later, smart IC cards appeared, but this method also has potential safety hazards of being copied or stolen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0020] A face recognition method for an access control system, comprising: initializing the system after it is powered on; when someone passes through the door, a request is made to the system using a hardware interrupt; after the system receives the request, the interrupt is shielded; After the image is finished, the image sensor notifies ARM9 that the acquisition is completed through an interrupt, and the system starts to process and recognize the portrait, and finally outputs the recognition result through a hardware interrupt.

[0021] Specifically include the following steps:

[0022] (1) After power-on, the system completes initialization, and the programs and data stored in FLASH are loaded into SDRAM;

[0023] (2) The image acquis...

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PUM

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Abstract

The invention discloses a face recognition method of an access control system. The face recognition method comprises the steps that after being electrified, the system is firstly initialized; when a person passes a door, a hardware interrupt is utilized to propose a request to the system; after the system obtains the request, the interrupt is shielded, and a portrait capturing instruction is sentto an image sensor; after image acquisition is finished, the image sensor informs ARM9 of completion of acquisition by an interrupt mode; the system starts to process and recognize a portrait and finally outputs a recognition result by the hardware interrupt. The face recognition method disclosed by the invention has the advantages that the CMOS (Complementary Metal-Oxide Semiconductor) image sensor is adopted for image acquisition under the control of ARM9 (Acorn RISC Machine), an improved PCA (Principal Component Analysis) algorithm is utilized for recognizing face images, so that the recognition efficiency and the accuracy are improved and the practicability of the system is improved; and the face recognition can be finished in one second, the recognition rate of the system is 98.5% andthe error recognition rate is 1.25%.

Description

technical field [0001] The invention relates to a face recognition method for an access control system. Background technique [0002] In daily life, people must use various access control locks everywhere. From the control mode of access control locks, there are mainly keys, passwords, magnetic cards and IC cards. With the improvement of people's living standards, the indispensable necessary appliance of access control locks has also brought a lot of troubles to life. Judging from the existing control methods of access control locks, there are certain security risks. Keys, passwords and magnetic cards are easy to copy and steal; IC cards are relatively safe, but they are also easy to lose. Early technology was based on personal passwords, which have an increasing probability of being cracked or snooped. Later, smart IC cards appeared, but this method also has potential safety hazards of being copied or stolen. Biometric identification will become an important change in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C9/00G06K9/00
CPCG07C9/37G06V40/166G06V40/168G06V40/172
Inventor 夏泽宇
Owner SUZHOU DACHENG ELECTRIC TECH CO LTD