| A novel auto-focus function | |
| Wang, Jian1,2; Chen, Hong-Bin1; Wang, J. | |
| Volume | 8420 |
| Pages | 842012 |
| 2012 | |
| Language | 英语 |
| ISSN | 0277786X |
| DOI | 10.1117/12.970405 |
| Indexed By | Ei |
| Subtype | 会议论文 |
| Abstract | The one key problem of passive auto-focus technique based on image is image definition criterion which is estimated by auto-focus function.This paper analyzes the limitation of traditional spatial domain auto-focus functions which are not sensitive to small changes of images,and presents a new auto-focus evaluation function which uses the combination filters to strengthen the image medium-frequency information.In order to evaluate the new function performance,the parameters of unimodality,accuracy,sensitivity,calculating cost are compared and analyzed.Compared with the traditional spatial domain evaluation functions,such as Brenner function,Laplacian function and Tenengrad function,the experimental results show that the new function has a fast calculation speed,and has a high sensitivity. © 2012 SPIE.; The one key problem of passive auto-focus technique based on image is image definition criterion which is estimated by auto-focus function.This paper analyzes the limitation of traditional spatial domain auto-focus functions which are not sensitive to small changes of images,and presents a new auto-focus evaluation function which uses the combination filters to strengthen the image medium-frequency information.In order to evaluate the new function performance,the parameters of unimodality,accuracy,sensitivity,calculating cost are compared and analyzed.Compared with the traditional spatial domain evaluation functions,such as Brenner function,Laplacian function and Tenengrad function,the experimental results show that the new function has a fast calculation speed,and has a high sensitivity. © 2012 SPIE. |
| Conference Name | Proceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing |
| Conference Date | 2012 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.ioe.ac.cn/handle/181551/7387 |
| Collection | 光电工程总体研究室（一室） |
| Corresponding Author | Wang, J. |
| Affiliation | 1. Institute of Optics and Electronics, Chinese Academy of Engineering, Chengdu, 610209, China 2. Graduate University, Chinese Academy of Sciences, Beijing, 100049, China |
| Recommended Citation GB/T 7714 | Wang, Jian,Chen, Hong-Bin,Wang, J.. A novel auto-focus function[C],2012:842012. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2012-2121.pdf（259KB） | 会议论文 | 开放获取 | CC BY-NC-SA | Application Full Text | ||
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