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A novel auto-focus function
Wang, Jian1,2; Chen, Hong-Bin1; Wang, J.
Volume8420
Pages842012
2012
Language英语
ISSN0277786X
DOI10.1117/12.970405
Indexed ByEi
Subtype会议论文
AbstractThe 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 NameProceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing
Conference Date2012
Citation statistics
Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7387
Collection光电工程总体研究室(一室)
Corresponding AuthorWang, J.
Affiliation1. 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.
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