June 2009

Conference Paper

Phenological Event Detection from Multitemporal Image Data

By:
Vatsavai, Ranga R
Page Number:
49-55
Book Title:
Proceedings of the Third International Workshop on Knowledge Discovery from Sensor Data (SensorKDD)
Publication Date:
June 2009
Publisher Location:
ACM, New York, New Jersey, United States of America
Conference Name:
ACM SIGKDD International Workshop on Knowledge Discovery from Sensor Data
Conference Location:
Paris, France
Conference Sponsor:
ACM, ORNL, Cooperating Objects Network Of Excellence (FP7-CONET)

Abstract

Monitoring biomass over large geographic regions for seasonal changes in vegetation and crop phenology is important for many applications. In this paper we a present a novel clustering based change detection method using MODIS NDVI time series data. We used well known EM technique to find GMM parameters and Bayesian Information Criteria (BIC) for determining the number of clusters. KL Divergence measure is then used to establish the cluster correspondence across two years (2001 and 2006) to determine changes between these two years. The changes identied were further analyzed for understanding phenological events. This preliminary study shows interesting relationships between key phenological events such as onset, length, end of growing seasons.