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A New Method Based on Morphologic Filter and Ant Colony Algorithm to Enhance Centroid Detection Accuracy of Shack-Hartmann Wavefront Sensor
Zhang Yanyan; Li MEi; Rao Changhui; Zhang YY (Zhang Yanyan)
Volume7157
Pages71571J
2009
Language英语
Subtype会议论文
AbstractShack-Hartmann wavefront sensor(SHWFS)is widely used in adaptive optics systems.Its centroid detecting error is one of the main error sources in adaptive optical systems.There are many factors affecting the detecting accuracy such as photon shot noise,readout noise,background level of CCD camera and number of detecting pixels.It is very effective to enhance the centroid accuracy by setting the threshold for the images of the SHWFS.But in daytime,the sky background is strong and changes very fast.The threshold cannot be chosen automatically either.In this paper,a new method based on the morphologic filter and ant colony algorithm is proposed to improve the SHWFS centroid detecting accuracy.The principle of the morphologic filter and the ant colony algorithm is introduced and the simulation results are also presented.The results show the proposed method can enhance SHWFS centroid accuracy very well.; Shack-Hartmann wavefront sensor(SHWFS)is widely used in adaptive optics systems.Its centroid detecting error is one of the main error sources in adaptive optical systems.There are many factors affecting the detecting accuracy such as photon shot noise,readout noise,background level of CCD camera and number of detecting pixels.It is very effective to enhance the centroid accuracy by setting the threshold for the images of the SHWFS.But in daytime,the sky background is strong and changes very fast.The threshold cannot be chosen automatically either.In this paper,a new method based on the morphologic filter and ant colony algorithm is proposed to improve the SHWFS centroid detecting accuracy.The principle of the morphologic filter and the ant colony algorithm is introduced and the simulation results are also presented.The results show the proposed method can enhance SHWFS centroid accuracy very well.
Conference Name2008 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY: ADVANCED SENSOR TECHNOLOGIES AND APPLICATIONS
Conference Date2009
Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7734
Collection自适应光学技术研究室(八室)
Corresponding AuthorZhang YY (Zhang Yanyan)
Affiliation中国科学院光电技术研究所
Recommended Citation
GB/T 7714
Zhang Yanyan,Li MEi,Rao Changhui,et al. A New Method Based on Morphologic Filter and Ant Colony Algorithm to Enhance Centroid Detection Accuracy of Shack-Hartmann Wavefront Sensor[C],2009:71571J.
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