The Research On The Auto Fingerprints Identification Algorithm

Human computer interface study becomes more and more important with the development of computer and multimedia technology. In this area, the interactive whiteboard is a crucial type. An interactive whiteboard is mainly composed of three equipments: a computer, a large screen display and a touch-sensitive screen. An interactive whiteboard can be integrated with data and video conferencing systems for real-time interaction. One can control the video and data together from the interactive whiteboard's touch-sensitive surface and annotate over the document using the special pointer, etc.First, the theory of the interactive digital whiteboard has been introduced briefly. Next, the systematic structure is analyzed, which is based on DSP&FPGA.The backsight orientation of CCD and the interface of other chips is described. For detecting the coordinate of lightpen in practical application, algorithms of the facula target detecting and the image distortion rectificating are proposed.Then, the development of system software is discussed, including the transplant of the real-time operating system-DSP/BIOS, the distribution of multitask, and the optimizing of image processing algorithms. Next every flow of system start-up and initialization is introduced. At last, the reliability and application performance of this product is analyzed, with the experiment scheme and the experiment result.At the end of this dissertation, the orientation to enhance the performance is also discussed. As the theories and the experiment result shown, the inter-active electronic whiteboard system has a reasonable design in low cost, which is reliable and can process in real time for application.