大视场空间目标搜索相机鬼像抑制及试验验证

大视场空间目标搜索相机光学系统由多片透镜组合而成,杂散光进入视场时在像平面上产生鬼像,对目标提取产生影响,须对鬼像进行抑制。首先,分析了实际搜索相机地面观星试验时月光进视场图片及星点质心数据,确定鬼像区域存在杂点被误提取;然后,根据大视场光学系统特点,结合光学设计软件ZEMAX仿真确定了产生鬼像的原因;最后,提出了在探测器玻璃保护盖上增加光学截止膜的方法来抑制非正常鬼像并进行了观星试验验证。结果表明:增加光学截止膜后搜索相机鬼像区域平均灰度值由78(@8bit)降低到64,能量下降了17.95%;鬼像边缘与中心灰度差由22降低到13,可有效避免鬼像区域杂点被误提取。

Erratum to: An advanced segmentation using area and boundary tracing technique in extraction of lungs region

Erratum to：J.Cent.South Univ.（2014）21：3811-3820DOI：10.1007/s11771-014-2366-9The original version of this article unfortunately contained three mistakes.The mistakes are corrected as follows：1）The spelling of third author is incorrect.The correct name is Jae-Young PYUN.2）The information of corresponding author is incorrect.The correct information should be Goo-Rak KWON,Professor,PhD;Tel/Fax：＋98-711-7264102;E-mail：grkwon@chosun.ac.kr