基于一种图像恢复技术的光谱CCD图像宇宙线剔除算法(英文)  

Cosmic-ray rejection by an image restoration technique on the spectroscopic CCD image

作　　者：张垒[1] 白仲瑞[1] 王超[1] 叶中付[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系信号统计处理实验室,安徽合肥230027

出　　处：《中国科学技术大学学报》2007年第6期688-694,共7页JUSTC

基　　金：Supported by National Most I mportant Science Engineeringin Nineth Five-Year-Plan(98BJG001).

摘　　要：提出一种单幅光谱CCD图像宇宙线剔除方法.即先采用一种改进的中值滤波器找到可能被宇宙线污染的像素点作为噪声候选点;然后采用一种边缘保持算法——TV inpainting恢复被噪声污染的像素点值.模拟实验结果表明,该方法能够很好地剔除宇宙线,同时恢复被宇宙线污染像素点的流量值.A method was proposed to find and remove cosmic-rays from single spectroscopic CCD images. First, a modified median filter was used to identify pixels that are likely to be contaminated by cosmic-ray, as noise candidates. Then an edge-preserving technique, called TV inpainting, was used to restore the noise corrupted pixels. The method was applied to spectroscopic CCD images. The result shows that cosmic-ray can be well-rejected without obvious degradation on the pixel flux value.

关 键 词：光谱CCD图像 宇宙线 数字全变差修补 

分 类 号：P144[天文地球—天体物理]