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Detecting land cover change using an extended Kalman filter on MODIS NDVI time series data

Citation

Kleynhans, W and Olivier, JC and Wessels, KJ and Salmon, BP and van den Bergh, F and Steenkamp, KC, Detecting land cover change using an extended Kalman filter on MODIS NDVI time series data, IEEE Geoscience and Remote Sensing Letters, 8, (3) pp. 507-511. ISSN 1545-598X (2011) [Refereed Article]

DOI: doi:10.1109/LGRS.2010.2089495

Abstract

A method for detecting land cover change using NDVI time-series data derived from 500-m MODIS satellite data is proposed. The algorithm acts as a per-pixel change alarm and takes the NDVI time series of a 3 x 3 grid of MODIS pixels as the input. The NDVI time series for each of these pixels was modeled as a triply (mean, phase, and amplitude) modulated cosine function, and an extended Kalman filter was used to estimate the parameters of the modulated cosine function through time. A spatial comparison between the center pixel of the 3 x 3 grid and each of its neighboring pixel's mean and amplitude parameter sequence was done to calculate a change metric which yields a change or no-change decision after thresholding. Although the development of new settlements is the most prevalent form of land cover change in South Africa, it is rarely mapped, and known examples amount to a limited number of changed MODIS pixels. Therefore, simulated change data were generated and used for the preliminary optimization of the change detection method. After optimization, the method was evaluated on examples of known land cover change in the study area, and experimental results indicate an 89% change detection accuracy while a traditional annual NDVI differencing method could only achieve a 63% change detection accuracy.

Item Details

Item Type:Refereed Article
Keywords:change detection, extended Kalman filter, time series
Research Division:Engineering
Research Group:Electrical and Electronic Engineering
Research Field:Electrical and Electronic Engineering not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Engineering
Author:Olivier, JC (Professor JC Olivier)
Author:Salmon, BP (Dr Brian Salmon)
ID Code:77854
Year Published:2011
Web of Science® Times Cited:32
Deposited By:Engineering
Deposited On:2012-06-01
Last Modified:2014-12-05
Downloads:0

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