TI指纹系统解决方案

Fingerprint Biometrics
Fingerprint Biometric technology refers to the use of a persons fingerprint characteristics for identifying that person.


Design Considerations

The fingerprint sensor captures an image of the finger and relays it to the DSP. The DSP runs image enhancement, template extraction and identification and/or authentication algorithms to match the captured image against stored fingerprint templates. On a successful match, the DSP sends a signal across the RS232 standard to authorize access to the secured asset along with using some form of visual or audio signal to let the user and the system know that the user is verified. On a failed match, some form of visual or audio signal can be generated using the DSP to alert the users and the administrators.
Solutions for biometric products based on Texas Instruments DSPs provide developers the flexibility to design a wide range of products. By leveraging the DSP programmability, low power consumption and high processing performance developers can design highly accurate, differentiated products with customized features to meet changing market needs.

The Fingerprint Biometric System uses TI DSP technology, coupled with identification (1:n) and authenication (1:1) software and a fingerprint sensor. TI has partnered with a number of third parties to provide software that enables a variety of TI DSPs on a number of popular fingerprint sensors on the market today such as Authentec, FingerPrint Cards and Atmel. TI DSP solutions support biometric software from a number of vendors, including 123id, Bioscrypt and Fingerprint Cards among others.

The core subsystems include:

DSP
- Digital Signal Processor capable of running high speed mathematically intensive Authentication (1:n) and Verification 1:1) fingerprint matching algorithms
Fingerprint Sensor
- Biometric sensor capable of capturing distinguishing features of a fingerprint in digital format
External Memory
- stores executing code and data/parameters such as fingerprint templates
RS232 Dual Channel/Receiver
- Converts TIA/EIA-232-F inputs to 5V TTL/CMOS levels for interfacing across the RS232 standard
Power Management
- Converts the input power from the AC adaptor or battery to the correct regulated voltages for various functional blocks.

Application Notes

DSP for Smart Biometric Solutions - White Paper (Rev. A) (spra894a.htm, 10 KB)
12 May 2003 Abstract
Performance Analysis of Face Recognition Algorithms on TMS320C64x DSPs (spra874.htm, 9 KB)
03 Dec 2002 Abstract
Wavelet Transforms in the TMS320C55x (spra800.htm, 9 KB)
04 Jan 2002 Abstract
A DSP Kernel for Online Dynamic Handwritten Signature Verification Using TMS320 (spra304.htm, 9 KB)
01 Jul 1997 Abstract
Speaker Independent Speech Recognition on the TMS320C2x and TMS320C5x DSPs (spra100.htm, 9 KB)
01 Oct 1994 Abstract