Cosmic-Ray Detection Based on Gray-Scale Morphology of Spectroscopic CCD Images

Publications of the Astronomical Society of Australia

Jia Zhu¹ 

[1] Zhangqin Zhu

关键词: techniques: image processing;    cosmic rays;   

DOI  :  10.1071/AS08050

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

Detection of cosmic-ray hits is important because of their disturbing effects on image processing. An algorithm based on gray-scale morphology to detect cosmic-rays in single spectroscopic CCD images is presented in this paper. Based on the morphological differences between cosmic-ray hits and spectra, the operations of erosion and dilation are used to deal with images successively, with appropriate structuring elements. Points of cosmic-ray hits can be detected by analyzing the variation between data pre- and post-operation. Examples of the algorithm are given at the end of this paper, with several groups of both simulated LAMOST images and observed SDSS images to show its performance.

【 授权许可】

Unknown