Research On The On-Line Signature Data Acquisition System

Nowadays the development of network information causes the information security of individual status to become a key question. Identify verification is a problem which information security faces. The biometric identification has obtained more widespread application because it has some advantages compared with traditional identify verification, such as security is good, easy to carry, not easy to get lost and forgotten and so on. On-line signature identification is the technology based on biometrics technology, through computer to compare the image, strokes, speed and pressure of handwritten signature with the true style to distinguish the signature in real-time.This paper first introduces the current situation and development prospects of biometric identification. Several of the biometric identification methods are compared. Later this paper puts forward a data acquisition system based on signature verification, its main function is to collect the x coordinate, y coordinate and pressure of handwriting information and make Handwriting information real-time display on the LCD. After completion of the data acquisition, the system uses the USB interface to transmit the handwriting information to PC .PC will save the information and make display. Finally this paper introduces some reasons for signature errors and the solutions to errors in data preprocessing .The key point of this paper is the software design and hardware design for on-line signature data acquisition system based on four-line resistance touch panel. The hardware of acquisition system mainly includes data acquisition module, show module, USB communication module and control module. The working principle is through touch panel to collect handwriting information with the frequency 200Hz, and transmit handwriting information to MCU in real-time. MCU process data simply and transmit data to the show module to make the handwriting display. The people can refer it. This will be followed by data transmission using USB interface in the PC for display and preservation. On the basis of the overall circuit introduction, this paper also introduces the four-line resistance touch panel and the control method of touch panel controller ADS7846, the working principle of LCD controller SED1335 and USB controller PDIUSBD12. The software design of acquisition system mainly includes fireware programme and PC programme. PC programme includes dll, driver programme and apply programme.The experimental results show that the system has high acquisition precision,...