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Based on the requirements of digital intelligent community construction, fingerprint recognition technology is used to realize the identification of the residents in the community, such as consumption, parking charges, and measurement queries. The intelligent community fingerprinting system plan is designed. The design of the smart community fingerprinting system is based on a new field of application of fingerprint recognition technology. It is a fingerprint pass management system that uses the local area network (LAN) to transmit data and implement various identification applications for the community.
Based on this demand, the fingerprint automatic identification technology was applied to community hospitals for medical treatment, community supermarket shopping, electricity use, water room fetching water, bathing, community activity room activities, reading books in the reading room of the library, access to buildings, and access to the community. Has achieved better results. It mainly solves the problem that residents have a large number of documents that are easily lost and brings a lot of inconvenience to life. The application of the fingerprint pass-through system designed with fingerprint automatic identification technology has improved the management level and promoted the modernization of management methods.
Embedded fingerprint identification technology in the community management system, users do not need to bring any documents, just press the fingerprint on the fingerprint reader, you can apply for community residents to identify the identity of the things, not only to facilitate the user, but also reduce the work The workload of the staff has fundamentally eliminated the phenomenon of misappropriation and misuse of other people’s documents. The implementation of the fingerprint identification system is not out of reach. The hardware investment in the fingerprint identification system is not large, and the average smart community can accept it. The key technology is the development of the identification system software and the integration of the identification system software and the management system software of the community.
Fingerprint identification technology
As we all know, the fingerprint of a person is unique and stable. That is, the fingerprint of each person is unique. There is no identical fingerprint between the two, and each person's fingerprint is quite fixed and generally does not follow the ages. Changes in health status change, so you can identify people by fingerprinting. At present, there are many automatic fingerprint identification systems at home and abroad, but their structures are similar, and generally include the collection and classification of fingerprints, the matching of fingerprint details, and the compression and storage of fingerprints.
1. Fingerprint collection and classification
This is the first step in the operation of the AFIS. The image of the living body fingerprint is entered into the system through an optical or CMOS fingerprint acquisition device, and the image is divided and processed, and on the premise of keeping the useful fingerprint information substantially intact, some redundant image information is cut off to generate a relatively small fingerprint image. The graph enhances noise reduction, enhances the contrast of ridges and valleys, and improves image quality. Then extract the features of the image, generate an array of directions, and then through the fingerprint analyzer, according to the ridge and valley flow direction of the fingerprint, classify it into five types: pointed arch, arch, left ring, right ring, and vortex. Small species category. The main purpose of fingerprint classification is to facilitate the management of large-capacity fingerprint databases, reduce the search space, and accelerate the fingerprint matching process.
2. Acquisition of fingerprints
After the fingerprint identification device is properly connected, fingerprints can be recorded and entered. In the collection process of the reader's fingerprint, the reader's fingerprint needs to be entered twice. The first collected fingerprint and the second collected fingerprint are compared. If successful, the system will be saved normally and added to the fingerprint recognition system.
If the collected fingerprint fails, the system will give a voice prompt. If the identification fails, the save function cannot be used and it needs to be re-acquired. The dual quality control is performed before the collected reader fingerprint information is stored in the database. To determine the quality of the collected fingerprints, a 1:1 single comparison is performed between the fingerprint information collected the second time and the fingerprint templates collected for the first time, so as to ensure the quality of the fingerprint collection and prevent illegal and unqualified fingerprint information from being stored in the database.
3 fingerprint matching
This is the core of the automatic fingerprint recognition system. The Biokey algorithm is used in this system. This algorithm is a fast and accurate 1:1 and 1:N fingerprint recognition algorithm. When using Biokey for fingerprint recognition, 2000~6000 fingerprints), no need to pass fingerprints through the name. Pre-classification of PIN, PIN, etc. can easily be completed within 1~5S. All of the tests are performed in a Pentium III 900MHz 128MB memory environment).
4. Fingerprint compression and storage
In order to save storage space, the fingerprint image must be compressed. At present, the fingerprint image data compression algorithm is more common JPEG, WSQ and EZW, etc. This system uses Biokey-WSQ image compression algorithm based on adaptive scalar quantization and wavelet decomposition, this algorithm can be used to maintain the fingerprint when compressing the fingerprint image. The detailed feature point information, after decompression, has little effect on extracting the fingerprint detail feature accuracy. When the WSQ algorithm compresses the fingerprint image with a large compression ratio, it is better to restore the position of the detailed feature points of the decompressed fingerprint image and save the related information, and it has less influence on the fingerprint identification that will be performed later. The WSQ compression ratio is 1:20 or 1:15, which means that a fingerprint image can be compressed to 6~10K. This compression ratio is very suitable using this algorithm. This not only saves storage space, but also does not affect the extraction of template feature points after decompression. It is used for fingerprint image compression, and taking into account the need for fingerprint image recognition, the algorithm is improved from the perspective of keeping key information as much as possible.
Intelligent Community Fingerprint Management Platform Analysis
The system is divided into three major modules: the system operation module, the system management module, and the data management module. In the system operation module, the fingerprint instrument initialization module is designed so that the computer recognizes the fingerprint instrument. In the normal operation, fingerprint input, fingerprint editing, fingerprint identification, and device shutdown are performed. In the system management module, user management and window hiding are designed. Function; In the data management module, the user's fingerprint database backup and recovery functions are designed; and online help functions are designed.
Intelligent Community fingerprinting system overall design
The overall design of the intelligent community fingerprinting system is based on the persistence of advanced nature, practicality, stability, security, economy, and scalability. It directly uses the local area network to transmit data and realize various types of business charges and various identities. The application of identification.
Realize identification of various types in the community, use fingerprint readers to identify identities, cancel all documents; realize data sharing for identity recognition; realize the management system of community garages, borrow books in the library reading room of books, catering in communities, supermarket shopping and public baths Control management; three-sheet copy metering; community hospital registration fee management, access control systems.
This system is designed to do interface specification processing and unified standards for various application systems or new systems, and then use the fingerprint management platform software of the smart community fingerprint system to write a unified interface. According to this idea, two application platforms, ie fingerprint management platform and application platform, are designed for the intelligent community fingerprint pass system. Their functions are shown in Figure 3.
1. Fingerprint management system platform design
Using Delphi7.0 to achieve the various subsystems and to achieve the integration of the entire system. SQLServer2003 is a database support.
The system uses C/S mode. It can support simultaneous operation of multiple users and seamlessly connect with other application management systems.
Establishment of Basic Information Fingerprint Database 1) First, collect fingerprint information of residents in the community, establish basic, standardized, unified, and standard fingerprint basic information databases according to various organizations, and use them as identification information of intelligent community fingerprint system. Enter the digital intelligent community fingerprint access application platform.
2) The use of DLL technology, the database connection content for a reasonable and effective packaging. If the system is running for the first time, the automatic connection wizard of the database will be invoked to guide the operator to set the correct database step by step. The database creation is to create an initialization database for the support system to run on the server before the system is running. Various types of information needed for program operation will be automatically completed when the database is created.
3) Fingerprint information acquisition and recognition process to achieve voice prompts, if the user's fingerprint is collected after the quality is not qualified, the system will prompt registration failure (voice), and in the form's status bar display registration information. If the registration is successful, the system prompts successful registration (voice), and automatically enters the fingerprint recognition status, and gives prompt information in the status bar. This operation method can promptly and effectively prompt the operator and the user's behavior. The fingerprint collection is to collect the user's fingerprint information into the database for future identification, editing and other maintenance.
2. Application platform design
Smart Community fingerprinting system application platform, adopting intelligent community fingerprinting system to realize the management system including the community garage, the borrowing of books and periodicals library books, the control of residential catering, supermarket shopping and public baths; the measurement of the three forms of copying; the registration of the residential hospitals Charge management, access control systems and other connections.
Access control is managed through a community fingerprinting system application platform. The network fingerprint access control system is used. Multiple access control subsystems and network switches installed in the property management center and a management monitoring computer are connected through a local area network. Each access control subsystem It consists of an access controller, a number of fingerprint identification terminals and a number of fingerprint lock controllers, which are installed in the entrances and exits of the community and the residents of the corridor. The door controller performs comparison analysis on the user's fingerprints, and is responsible for uploading user information and other information to the management monitoring computer. After the user's fingerprint verification passes, the access controller commands the fingerprint lock controller to control the electric lock to open the door.
The community parking lot management is implemented through the community fingerprinting system application platform. The entrance barriers are embedded in the entrance and exit, and are composed of electronic barriers and computer barrier gate control software. The electronic barrier includes the information prompt display, barrier body, brake lever controller and embedded fingerprint button module (fingerprint collector). When exiting or entering the warehouse, the driver only needs to click away from the window and set it down with his finger. After the fingerprint button on the fingerprint sensor controller and the driver's fingerprint verification pass, the brake lever controller will control the lift of the brake lever and record the relevant information.
On the basis of the intelligent community fingerprinting management platform, the extended interface and intelligent control reserved by the system can realize interworking with various types of application systems that have already been operated in the community, forming a digital management space and a sharing environment in a full-cell range.
Conclusion
Today, with the advancement of science and technology, the construction of digitalized intelligent communities has brought new and positive changes to the intelligent management of China's residential communities, which has enabled the intelligent management of communities to move to a new level. By designing an intelligent community fingerprint access management system, it was first applied to the system of community book reading management and parking lot management. This achievement has proved that the construction of the intelligent community fingerprinting system has a wide range of application prospects.
Community intelligence is a comprehensive system engineering, which needs to be considered from many aspects such as its function, performance, cost, expansion capability and application of modern related technologies. It is necessary not only to consider the investment cost for the initial construction of the system, but also to take into account the practicality, operability, and the cost of system operation and maintenance in the future operation of the system. Therefore, in the design and selection of the various systems in the community, all factors must be taken into full consideration. It is crucial to select products with mature technologies, high reliability, and good cost performance.