摘要
掌纹采集装置多采用计算机控制扫描仪或者图像采集卡来采集掌纹图像。为解决现有掌纹图像采集装置速度慢,易受噪声干扰等问题,提出了一种新型的基于数字信号处理(DSP)的掌纹采集装置,设计了掌纹取样机械结构、光学单元和硬件电路。利用TI公司的TMS320VC5509A DSP为控制芯片,扩展了数据存储空间,并控制视频解码器SAA7113H将掌纹图像转换成数字图像,实现了脱机模式下掌纹图像的采集。进行了掌纹图像采集实验并完成了掌纹图像识别,结果表明,采集一幅掌纹图像用时为0.6 s,正确识别率为99.47%。该系统具有很高的识别率并具有速度快、成本低等特点。
Currently, palm-print sampling instruments all take advantage of PCs to control scanners or image sampling cards to achieve the image sampling. To improve the sampling speed and reduce the noise interference, a new instrument based on Digital Signal Processing（DSP） is proposed and its sam- piing mechanism,optical structure and hardware circuits are designed. A core, TMS320VC5509A DSP of the TI Company, is used as a control element to extend the storage space while a decoder SAA7113H is controlled to convert the real palm-prints into digital images, so that the sampling pro- cedure is achieved in the off-PC state. An experiment for sampling palm-print images is undertaken and the obtained images are recognized. Experimental results indicate that the sampling time by pro- posed equipment is 0.6 s for one image and the correct recognition rate is 99.47% ,which shows that this equipment operates at its highest speed, anti-noise character and recognition rate.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2009年第10期2555-2560,共6页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.60672078
No.60472088)
