Research Of Iris Recognition System Based On DSP

In the rapid development of information technology and frequent personnel exchanges in the modern society, secure, reliable and efficient identication technologies have been the most urgent key social problems. Iris recognition is being paid attention by people gradually, for its exclusive, stability, collectible and non-invasive capability.Embedded system's advantages in reliability, cost, volume, consumption, make embedded iris recognition system becomes the inevitable trend of the commercialization of iris recognition products. Firstly, the author comprehended and compared various DSPs, and finally chose TI's TMS320DM642 multimedia processor as the terminal's main processor. In the light of the structural characteristics of DM642, selecting peripheral devices and then designing schematics of the terminal. Then completing the PCB layout design in accordance with electromagnetic compatibility and signal integrity in high-speed PCB board. Secondly, the author produced the hardware of the terminal and tested until it can function succefully. Thirdly, the autor embarked upon the development of the terminal's sofeware platform in TI's CCS IDE.The paper proposes one iris localization method that combines the least-squares theorem and the Hough transformation, and developes a fusion encoding method based on the iris's phase information by using 2D Gabor filters to extract. At last, this paper analyses the development flow of iris recognition system software by using CCS. The software includes memory management and using of DDK development of video drivers, and so on. The paper completes the algorithm optimization and software porting, realizes the iris image recognition process.