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介绍指纹采集技术的发展与现状,提出一种基于NiosII[1]的嵌入式指纹采集系统;通过自定义FPS200外设和VGA外设与开发板硬件连接,采用MCU接口方式;对于FPS200的初始化和指纹采集程序的编写,根据不同采集环境调整芯片相应参数可以获得最佳清晰度的原始指纹图像,并获得良好效果。实验证明:采集的指纹图像纹理清晰,背景噪声小,且采集速度快,具有接口方便、成本低、开发周期短、安全性能高等优点。
This paper introduces the development and current situation of fingerprint acquisition technology, proposes an embedded fingerprint acquisition system based on NiosII [1]; through custom hardware connection between FPS200 peripherals and VGA peripherals and development board, adopts MCU interface mode; for FPS200 initialization and Fingerprinting procedures for the preparation, according to different acquisition environment to adjust the appropriate parameters of the chip can get the best definition of the original fingerprint image, and get good results. Experiments show that the fingerprint image collected has clear texture, small background noise, fast acquisition speed, convenient interface, low cost, short development cycle and high safety performance.