摘要
根据介质阻挡放电人体指纹图像提取装置的物理模型,用数值计算的方法对电场进行了模拟,并就介质厚度对指纹图像清晰度的影响进行了研究。结果表明,随着介质层厚度的增加,放电空间的电场趋于均匀,导致指纹放电强度在空间均匀化,从而使指纹成像的分辨率下降。
Based on the physical model of the equipment of the human's fingerprint acquisition, the fingerprint discharge electric fields were simulated by the method of numerical calculation, and the effects of the dielectric film thickness were studied. The results show that with the increaseing of thickness of the dielectric film, electric field intensity of discharge trends to uniform, and the fingerprint discharge intensity then distributes uniformly in space, which results in a weakened fingerprint image definition.
出处
《真空电子技术》
2004年第6期22-25,共4页
Vacuum Electronics
基金
国家自然科学基金资助项目(50077015)
关键词
指纹
介质阻挡放电
电磁场数值计算
Fingerprint
Dielectric barrier discharge
Numerical calculation of electromagnetic
