Detecting rice crop phenology from time-series MODIS data

C. R. Chen, C. F. Chen, N. T. Son

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Information on rice crop phenology is important for crop management. This study aimed to detect rice crop phenology in the Vietnamese Mekong Delta using time-series MODIS data in 2007. Data processing steps included: (1) constructing time-series MODIS NDVI data, (2) filtering noise from the time-series data using empirical mode decomposition (EMD) and wavelet transform, (3) detecting rice crop phenology (sowing, heading, and harvesting dates) using local maxima algorithm, and (4) verifying the results using field survey data. The results indicated that EMD produced more accurate results in rice crop phenology detection than did wavelet transform. Comparisons between the estimated sowing and harvesting dates achieved by EMD and the field survey data indicated the root mean squared error (RMSE) values of 7.5 and 8.2 days, while those by wavelet transform were 21.3 and 21.6 days, respectively. The error of the estimated sowing date was generally smaller than that of the harvesting date. This discrepancy was due to the fact that the timing for rice harvesting was partly dependent on the weather conditions, especially for the second crop in the rainy season. This study demonstrated the merit of using EMD for rice crop phenology detection. The information of rice crop phenology produced from this study would be further used for studies of rice crop mapping and monitoring.

Original languageEnglish
Title of host publication33rd Asian Conference on Remote Sensing 2012, ACRS 2012
Pages436-440
Number of pages5
StatePublished - 2012
Event33rd Asian Conference on Remote Sensing 2012, ACRS 2012 - Pattaya, Thailand
Duration: 26 Nov 201230 Nov 2012

Publication series

Name33rd Asian Conference on Remote Sensing 2012, ACRS 2012
Volume1

Conference

Conference33rd Asian Conference on Remote Sensing 2012, ACRS 2012
Country/TerritoryThailand
CityPattaya
Period26/11/1230/11/12

Keywords

  • Crop phenology
  • Empirical mode decomposition
  • MODIS
  • Wavelet transform

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