Ionogram trace enhancement based on image pixel connectedness
Hongguang Lu, Guangrong Ji, Haiyong Zheng, Zhenwei Zhao, Shaohong He · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2013
This paper proposes a novel idea for ionogram trace enhancement to obtain the “clean” ionogram with real ionospheric echo signals, which is very important for further ionogram interpretation and scaling manually or automatically. Two methods based on ionogram trace pixel connectedness are adopted: max filter and connected components labeling. The experiments show that both methods are feasible and effective, and parameter selection and time complexity of the two methods are analyzed.