社保卡制作中高质量指纹图像提取

人的指纹特征不可复制,且具有唯一性、稳定性特点,用于居民的身份认证,能有效解决
普通手段制作的社保卡安全性、防伪性较差问题。简要介绍社保卡制作的系统构成及技术难点,主要介绍高质量指纹图像的提取。它由前端指纹传感器、微处理器、指纹图像存储单元、接口单元等组成,采用图像搜索技术,通过改变指纹传感器芯片的电容阵列参数,能在1 s 内扫描多帧指纹图像,并自动选择图像质量最好的,保证社保卡的制作质量。实践证明,本方案能大大减低系统误识率FAR、拒识率FRR.
关键词:图像;社保卡;指纹传感器;图像搜索技术
　　Abstract :Man’s fingerprint can’t be duplicated ,and have the characteristics of the unique and stability. Applied in the resident’s identity testing ,it can solve the problems of safety and defense. Introduce the construct and the key technol2 ogy of Social Security Card ,especially in the high quality fingerprint image picking - up in the processing of Social Security Card. The system is composed of fingerprint sensor ,microprocessing ,fingerprint image location etc. By using the image seek technology to change the capacity array parameter of fingerprint sensor ,it can scan the fingerprint diagram of many
frames in a second ,and automatically choosing the best image to ensure the quality of the social security card. The FAR and the FRR of the system can be widely reduced in the practice.
Key Words :Image ;Social Security Card ;Fingerprint Sensor ; Image Seek Technology