Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

A simple method for reconstructing a high-quality NDVI time-series data set based on the Savitzky-Golay filter

Author:
  • J Chen
  • Per Jönsson
  • M Tamura
  • ZH Gu
  • B Matsushita
  • Lars Eklundh
Publishing year: 2004
Language: English
Pages: 332-344
Publication/Series: Remote Sensing of Environment
Volume: 91
Issue: 3-4
Document type: Journal article
Publisher: Elsevier

Abstract english

Although the Normalized Difference Vegetation Index (NDVI) time-series data, derived from NOAA/AVFIRR, SPOT/VEGETATION, TERRA or AQUA/MODIS, has been successfully used in research regarding global environmental change, residual noise in the NDVI time-series data, even after applying strict pre-processing, impedes further analysis and risks generating erroneous results. Based on the assumptions that NDVI time-series follow annual cycles of growth and decline of vegetation, and that clouds or poor atmospheric conditions usually depress NDVI values, we have developed in the present study a simple but robust method based on the Savitzky-Golay filter to smooth out noise in NDVI time-series, specifically that caused primarily by cloud contamination and atmospheric variability. Our method was developed to make data approach the upper NDVI envelope and to reflect the changes in NDVI patterns via an iteration process. From the results obtained by applying the newly developed method to a 10-day MVC SPOT VGT-S product, we provide optimized parameters for the new method and compare this technique with the BISE algorithm and Fourier-based fitting method. Our results indicate that the new method is more effective in obtaining high-quality NDVI time-series.

Keywords

  • Atom and Molecular Physics and Optics
  • Physical Geography
  • time-series data set
  • Savitzky-Golay filter
  • NDVI
  • SPOT vegetation

Other

Published
  • ISSN: 0034-4257
E-mail: lars [dot] eklundh [at] nateko [dot] lu [dot] se

Professor

Dept of Physical Geography and Ecosystem Science

+46 46 222 96 55

454

16

Teaching staff

Dept of Physical Geography and Ecosystem Science

16

Department of Physical Geography and Ecosystem Science
Lund University
Sölvegatan 12
S-223 62 Lund
Sweden

Processing of personal data

Accessibility statement