A modified temporal criterion to meta-optimize the extended Kalman filter for land cover classification of remotely sensed time series
| Autor: | Waldo Kleynhans, Konrad J Wessels, F. van den Bergh, Jan C. Olivier, Brian P. Salmon |
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| Rok vydání: | 2018 |
| Předmět: |
Global and Planetary Change
Ground truth 010504 meteorology & atmospheric sciences Series (mathematics) Computer science 0211 other engineering and technologies 02 engineering and technology Land cover Management Monitoring Policy and Law 01 natural sciences Support vector machine Extended Kalman filter Trigonometric functions Moderate-resolution imaging spectroradiometer Computers in Earth Sciences Spatial analysis 021101 geological & geomatics engineering 0105 earth and related environmental sciences Earth-Surface Processes Remote sensing |
| Zdroj: | International Journal of Applied Earth Observation and Geoinformation. 67:20-29 |
| ISSN: | 1569-8432 |
| Popis: | Humans are transforming land cover at an ever-increasing rate. Accurate geographical maps on land cover, especially rural and urban settlements are essential to planning sustainable development. Time series extracted from MODerate resolution Imaging Spectroradiometer (MODIS) land surface reflectance products have been used to differentiate land cover classes by analyzing the seasonal patterns in reflectance. In our study area we have successfully fitted a triply modulated cosine function to these seasonal patterns. We previously developed a meta-optimization approach for setting the parameters of the non-linear Extended Kalman Filter (EKF) to efficiently estimate the model variables for these triply modulated cosine functions using spatial information. In this paper we modify this approach to utilize temporal information instead of spatial information. This significantly reduces the processing time and storage requirements to process each time series. The features extracted using the proposed method are classified with a support vector machine and the performance of the method is compared to the original approach on our ground truth data. |
| Databáze: | OpenAIRE |
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