CN1445713A

CN1445713A - Method and device for continuous processing transferring fingerprint images of rolling collected

Info

Publication number: CN1445713A
Application number: CN 03114361
Authority: CN
Inventors: 李沛生; 杨云霄
Original assignee: Huayun Science And Technology Co Ltd
Current assignee: Huayun Science And Technology Co Ltd
Priority date: 2003-04-28
Filing date: 2003-04-28
Publication date: 2003-10-01
Anticipated expiration: 2023-04-28
Also published as: CN1169084C

Abstract

A portable device for continuously processing and transmitting the fingerprint image acquired in rolling mode and its method are disclosed. The fingerprint image passes through A/D converter to become a continuous data stream. Under the control of CPLD, the data stream is continuously received and forms packets, which are stored in SRAM or transmitted to a computer or a portable device (PDA).

Description

Method and device that a kind of fingerprint image of gathering rolling is handled continuously and transmitted

Technical field:

The present invention relates to a kind of method and device thereof that view data is handled continuously and transmitted.

Background technology:

In the automatic system of fingerprint recognition that the police generally adopt, the tumbling-type fingerprint acquisition instrument is its nucleus equipment at present.This equipment is finished continuous (finger carries out continuous rolling) of fingerprint image is gathered, and with the image data transmission of gathering in computer.The rolling fingerprint acquisition instrument that the present police are adopted, various video processing board-cards have all been used, these video processing board-cards must be installed in the expansion slot (ISA or PCI) of the main circuit board of desktop personal computer, by computer control carrying out work, serve as the hardware interface card between fingerprint acquisition instrument and the computer, thereby finish continuous acquisition, processing and the transmission of fingerprint image.

But such mode obviously can not satisfy the requirement of mobile and portable working method.The movable police that the countries in the world police try hard to recommend need be with portable computer or PDA (personal digital assistant) the main platform as the personnel of police issued transaction.And portable computer and PDA (personal digital assistant) do not have expansion slot, and tumbling-type fingerprint acquisition instrument in the market all can not use on portable set.The police have proposed portable scheme requirement to the rolling fingerprint acquisition instrument thus.

Summary of the invention:

This requirement designs in order to solve just in the present invention.The invention provides and a kind ofly can satisfy police's movable police requirement, processing of real portable rolling fingerprint image and transmission method and device thereof.

The present invention handles continuously to the rolling fingerprint image and the method transmitted is to realize like this, fingerprint image is (by police's requirement, on the collection minute surface of fingerprint acquisition instrument, with the finger typing fingerprint image that rolls) reflect by optical prism, lens focus arrives image sensor chip CMOS Sensor (complementary metal-oxide-semiconductor image sensing chip) and goes up imaging, then through A/D conversion (analog/digital conversion), form the continuous data stream of rolling fingerprint image, again by CPLD (complex programmable logic equipment) control, store among the SRAM (static RAM), this data stream is by the logic control of CPLD (complex programmable logic equipment), and under the collaborative work of at least two SRAM (static RAM), realization is to the continuous reception and the packing of fingerprint image data, and be transferred in any all kinds of computers and portable set such as PDA with network interface by the fingerprint image data that it is good that 100M (million) network interface chip will be packed, the collaborative work of so-called two SRAM (static RAM) is meant, little process chip is handled data among the SRAM that receives fingerprint image earlier, another sheet SRAM continues to receive view data, after data processing finishes among preceding a slice SRAM, the data among a slice SRAM of back are handled in exchange, and the preceding a slice SRAM that has finished data processing can continue to receive new view data again.Finish continuous reception, packing and transmission thus to the rolling fingerprint image data.

Device of the present invention is to realize like this, the circuit of above-mentioned all working is completely implemented in the rolling fingerprint acquisition instrument, the work such as image acquisition, packing processing and data transmission control that are about to all realize on the rolling fingerprint instrument, because what select for use when computer transmits is the 100M network interface, and this is the standard configuration of present most computers, so fingerprint image data need not Flame Image Process and interface card to the transmission course of computer from the rolling fingerprint acquisition instrument.Device of the present invention mainly (contains prism by the optical profile type rolling fingerprint collecting parts that are arranged in the casing, refracting telescope, amasthenic lens, cmos image sensing chip etc., identical with the opticator of tradition rolling fingerprint acquisition instrument), CPLD (complex programmable logic equipment), at least two SRAM (static RAM), microprocessor, the 100M network interface chip, PS/2 QWERTY keyboard interface or USB interface constitute, the digital signal output end of optical profile type rolling fingerprint collecting parts links to each other with the signal input part of CPLD (complex programmable logic equipment), CPLD is connected with minimum two SRAM (static RAM) with microprocessor respectively, microprocessor is connected with the 100M network chip again, and PS/2 QWERTY keyboard interface or USB interface are connected with the power input of device.During work, 100M network interface with the rolling fingerprint acquisition instrument, by the network cable, be connected on the network interface of portable computer (being notebook computer) or PDA equipment, the rolling fingerprint acquisition instrument obtains working power by PS/2 QWERTY keyboard interface or USB interface from computer, fingerprint image data is after imaging on the cmos image sensing chip, store in turn on two SRAM (static RAM) by CPLD (complex programmable logic equipment), microprocessor takes turns the data among the treatment S RAM, and the packing back sends to computer by the 100M network chip.

Parts of the present invention (comprise that optical profile type rolling fingerprint collecting parts (contain prism, refracting telescope, amasthenic lens, cmos image sensing chip etc., identical with the opticator of tradition rolling fingerprint acquisition instrument), CPLD (complex programmable logic equipment), at least two SRAM (static RAM), microprocessor, the 100M network interface chip) total working current is less than 500 milliamperes, make this device to power, satisfy the police fully and move the needs of handling a case by portable computer.

Compared with the prior art the present invention has and can satisfy police's movable police requirement, the advantage that real portable rolling fingerprint image is handled and transmitted.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the image sensor chip circuit diagram;

Fig. 3 is CPLD (complex programmable logic equipment) and SRAM (static RAM) circuit diagram;

Fig. 4 is microprocessor circuit figure;

Fig. 5 is a 100M network chip circuit diagram;

Fig. 6 is the high efficiency switch power supply.

Embodiment:

Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail.

Implementation of the present invention is: on the collection minute surface of rolling fingerprint acquisition instrument, finger is rolled, focus on imaging on the cmos image sensing chip by exposure and light refraction.Because fingerprint is a continuous imaging in rolling process, thus need the continuous sampling amalgamation, so that form complete complete fingerprint image.Generally require per second continuous acquisition at least 10 frame fingerprint images.After these images carry out A/D (analog/digital) conversion by the CMOS chip, form continuous data stream, by the CPLD control store in SRAM, one by one the data among the SRAM are packed by microprocessor again, then by 100M network interface chip control transmission, arrive at last with computer that this device is connected in.Whole process by the collaborative work of minimum two SRAM, has guaranteed continuous processing and transmission to the fingerprint image data stream of continuous acquisition under the management control of microprocessor and CPLD.After these continuous fingerprint image datas are transferred to computer, will in computer, become a complete fingerprint image, use for Automated Fingerprint Identification System with the software amalgamation.

Device of the present invention is to realize like this, invention has redesigned the structure of rolling fingerprint acquisition instrument, keeping on traditional rolling fingerprint acquisition instrument optically detecting parts and the image acquisition principle of work basis of invariable, packing processing and transmission interface with continuous fingerprint image data, be completely implemented on the rolling fingerprint acquisition instrument of redesign, and selected general 100M network interface for use, strict controlling parts type selecting of while and circuit design, make rolling fingerprint acquisition instrument overall work Current Control in 500 milliamperes, be convenient to obtain power supply by the keyboard interface or the USB interface of computer.

The main structure of apparatus of the present invention comprises: 1, optical profile type rolling fingerprint collecting parts (containing prism, refracting telescope, amasthenic lens, cmos image sensing chip etc., identical with the opticator of tradition rolling fingerprint acquisition instrument); 2, CPLD (complex programmable logic equipment); 3, at least two SRAM (static RAM); 4, microprocessor; 5,100M network interface chip; 6, PS/2 QWERTY keyboard interface or USB interface.

The fingerprint image data of rolling imaging is after imaging on the cmos image sensing chip and finishing A/D (analog/digital) conversion, form continuous data stream, be input to CPLD (complex programmable logic equipment), CPLD is connected with minimum two SRAM (static RAM) with microprocessor respectively, and microprocessor is connected with the 100M network chip again.Microprocessor is handled two data among (or more) SRAM one by one in turn, and the packing back sends to computer by the 100M network interface chip.The SRAM that finishes data processing can receive new continuous fingerprint image data again, and so circulation is up to whole fingerprint image datas are handled and end of transmission.

As shown in Figure 6, adopt the high efficiency switch power supply to become the required supply voltage of equality circuit can prevent power loss in the transformation process to greatest extent the supply voltage transformation that external computer obtained, to guarantee to satisfy the electricity consumption requirement of device from the power supply that computer obtains.

Claims

1, the method that the rolling fingerprint image is handled continuously and transmitted, it is characterized in that fingerprint image is (by police's requirement, on the collection minute surface of fingerprint acquisition instrument, with the finger typing fingerprint image that rolls) reflect by optical prism, lens focus arrives image sensor chip CMOS Sensor (complementary metal-oxide-semiconductor image sensing chip) and goes up imaging, then through A/D conversion (analog/digital conversion), form the continuous data stream of rolling fingerprint image, again by CPLD (complex programmable logic equipment) control, store among the SRAM (static RAM), this data stream is by the logic control of CPLD (complex programmable logic equipment), and under the collaborative work of at least two SRAM (static RAM), realization is to the continuous reception and the packing of fingerprint image data, and be transferred in any all kinds of computers and portable set with network interface by the fingerprint image data that it is good that 100M (million) network interface chip will be packed, the collaborative work of so-called two SRAM (static RAM) is meant, little process chip is handled data among the SRAM that receives fingerprint image earlier, another sheet SRAM continues to receive view data, after data processing finishes among preceding a slice SRAM, the data among a slice SRAM of back are handled in exchange, and the preceding a slice SRAM that has finished data processing can continue to receive new view data again.

2, a kind of rolling fingerprint image is handled and transmitting device continuously, it is characterized in that main by the optical profile type rolling fingerprint collecting parts that are arranged in the casing, CPLD (complex programmable logic equipment), at least two SRAM (static RAM), microprocessor, the 100M network interface chip, PS/2 QWERTY keyboard interface or USB interface constitute, the digital signal output end of optical profile type rolling fingerprint collecting parts links to each other with the signal input part of CPLD (complex programmable logic equipment), CPLD is connected with minimum two SRAM (static RAM) with microprocessor respectively, microprocessor is connected with the 100M network chip again, and PS/2 QWERTY keyboard interface or USB interface are connected with the power input of device.