| Issue |
EPJ Web Conf.
Volume 237, 2020
The 29th International Laser Radar Conference (ILRC 29)
|
|
|---|---|---|
| Article Number | 01003 | |
| Number of page(s) | 3 | |
| Section | Space Lidars | |
| DOI | https://doi.org/10.1051/epjconf/202023701003 | |
| Published online | 07 July 2020 | |
https://doi.org/10.1051/epjconf/202023701003
An Adaptive Filter Based on Local Slope by Adjusting Elliptic Filter Kernel for ICESat-2 Photon Counting Laser Altimetric Data
College of Surveying and Geo-informatics, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
* Email: huanxie@tongji.edu.cn
Published online: 7 July 2020
The Ice, Cloud and Land Elevation Satellite-2 (ICESat-2) was launched on September 15th, 2018, which continues to perform measurement tasks as the successor to ICESat. Unlike full waveform technology of ICESat, ICESat-2 employs micropulse photon counting technology, which provides higher accuracy, but produces plenty of noise. This paper proposes an adaptive filter based on local slope by adjusting elliptic filter kernel. The general approach is 1) data preprocessing, 2) Gaussian density calculation, 3) OTSU adaptive threshold calculation. This method is seen to be robust in identifying signal points from high background noise points and suitable for low density data caused by slope.
Key words: photon counting / noise filtering / Gaussian density / ICESat-2
© The Authors, published by EDP Sciences, 2020
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