| 4f滤波系统抑制混淆 |
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| 引用本文： | 张海涛,巩马理,赵达尊,清华大学.4f滤波系统抑制混淆[J].光学技术,2001,27(4):297-298. |
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| 作者姓名： | 张海涛 巩马理 赵达尊 清华大学 |
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| 作者单位： | 精密仪器系光电研究所, |
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| 摘 要： | 光电成像系统欠抽样时 ,将产生混淆。使用 4f 系统预先滤除超出 Nyquist带宽的高频成分 ,不仅能够有效抑制混淆 ,而且还能够体现出预滤波方法抑制混淆的极限形式。分别设计了在单色光和白光照明时的滤波器 ,给出了几个方向上的 4f 预滤波成像结果
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| 关 键 词： | 混淆 4f系统 预滤波 欠抽样 光电成像系统 |
| 文章编号： | 1002-1582(2001)04-0297-02 |
| 修稿时间： | 2001年1月4日 |
Anti-aliasing using 4f filtering systems |
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| ZHANG Hai-tao ,GONG Ma li ,ZHAO Da zun.Anti-aliasing using 4f filtering systems[J].Optical Technique,2001,27(4):297-298. |
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| Authors: | ZHANG Hai-tao GONG Ma li ZHAO Da zun |
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| Institution: | ZHANG Hai-tao 1,GONG Ma li 1,ZHAO Da zun 2 |
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| Abstract: | In opto electric imaging systems, aliasing will occur when a scene is under sampled Exploiting 4 f systems to prefilter frequencies beyond Nyquist bandwidth, can effectively restrain aliasing, and improve the imaging quality obtained by ordinary prefiltering methods The prefilters are designed respectively under the illumination of monochromatic light and white light Images with reduction of aliasing have been obtained by 4 f prefiltering in several orientations |
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| Keywords: | aliasing 4 f system prefiltering under sampling opto electric imaging system |
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