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Department自适应光学技术研究室(八室)
Telescope images segmentation with OTSU method
Li, Min; Zhang, Ang; Xian, Hao
Source PublicationProceedings of SPIE - 9TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: LARGE MIRRORS AND TELESCOPES
Volume10837
Pages108370R
2018
Language英语
ISSN0277-786X
DOI10.1117/12.2507348
Indexed BySCI
WOS IDWOS:000459720200026
SubtypeC
AbstractThe optical alignment of telescopes is essential to satisfy the high request of image quality. One of the most easy and efficient approaches to correct the misalignments is based on the far-field images in the focal plane by maximizing sharpness metrics. To analyze the aberrations corresponding to different fields and various working conditions of telescopes, the image segmentation becomes an indispensable process. After image segmentation, aberrations can be studied in detail. What's more, it can also simplify the calculation. In this paper, OTSU method based on one-dimension histogram is adopted to segment the telescope images. First, images corresponding to different fields of the telescope in both designed and misaligned working conditions are simulated. Second, these images are segmented by the OTSU method to obtain a series of binary images. To verify the anti-noise capability of this method, noise images are simulated by adding Gaussian noise with different standard deviations. These noise images are also segmented by OTSU method. Then, edge checks are carried out to compare the segmentation results of noiseless images with noise images. The results indicate that for noiseless images and noise images simulated in designed working condition, the segmentation processes are accurately, while for noise images simulated in misaligned working condition, the segmentation results are influenced by noise.
Keywordtelescope images image segmentation OTSU method anti-noise capability
WOS KeywordALIGNMENT
Conference Name9th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Large Mirrors and Telescopes9th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Large Mirrors and Telescopes
Conference DateJUN 26-29, 2018JUN 26-29, 2018
Conference PlaceChengdu, PEOPLES R CHINAChengdu, PEOPLES R CHINA
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Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/9139
Collection自适应光学技术研究室(八室)
Recommended Citation
GB/T 7714
Li, Min,Zhang, Ang,Xian, Hao. Telescope images segmentation with OTSU method[C],2018:108370R.
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