| 指纹采集仪混频现象的研究 |
| |
| 引用本文： | 詹伟,黄玮,许伟才,江伦. 指纹采集仪混频现象的研究[J]. 光学技术, 2009, 35(6) |
| |
| 作者姓名： | 詹伟 黄玮 许伟才 江伦 |
| |
| 作者单位： | 中国科学院,长春光学精密机械与物理研究所,长春,130033;中国科学院,研究生院,北京,100039;中国科学院,长春光学精密机械与物理研究所,长春,130033 |
| |
| 摘 要： | 由于图像传感器的采样不足,在指纹仪成像质量检测中高频区域出现了混频现象。为了避免混频,提高指纹仪的成像质量,提出了指纹仪出现混频的区域。描述了指纹采集仪出现的混频现象,通过理论分析和计算,获得了指纹仪的混频区域。对实验得到的图像所出现的混频区域进行了测量,测量结果与理论计算结果基本一致。
|
| 关 键 词： | 成像光学 指纹采集仪 成像质量测试 混频 莫尔条纹 |
Study of the aliasing phenomenon of fingerprint scanner |
| |
| ZHAN Wei,HUANG Wei,XU Wei-cai,JIANG lun. Study of the aliasing phenomenon of fingerprint scanner[J]. Optical Technique, 2009, 35(6) |
| |
| Authors: | ZHAN Wei HUANG Wei XU Wei-cai JIANG lun |
| |
| Affiliation: | 1.Changchun Institute of Optics;Fine Mechanics and Physics;Chinese Academy of Sciences;Changchun 130033;China;2.Graduate University of Chinese Academy of Sciences;Beijing 100039;China |
| |
| Abstract: | Because of subsample effect of imaging sensor,the aliasing phenomenon of fingerprint scanner is presented in the image quality test.For avoiding aliasing and boosting the image quality in a acceptable region,the aliasing area is proposed.The aliaing phenomenon is described and the theoretical aliasing region is proposed after analysing and calculation.The measured result of the image is agreeed with theoretical analysis. |
| |
| Keywords: | imaging optics fingerprint scanner image quality test aliasing phenomenon moire fringe |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
