Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images: Two Hungarian case studies

Daniel Kristof, Robert Pataki, Dora Neidert, Z. Nagy, Krisztina Pinter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study is focused on the use of Moderate Resolution Imaging Spectroradiometer (MODIS) reflectance data along with high and very high resolution satellite images. The use of these data requires special attention and the elaboration of novel preprocessing methods, which is presented through two case studies. In the first one, the aim is to assess subpixel-scale changes associated to agricultural practice in an agricultural landscape. This requires the integration of temporal information from MODIS daily time series and spatial information from high resolution satellite images by means of subpixel unmixing. Our second case study is concentrated on the use of these images in direct radiometric rectification of high-resolution optical imagery. Our results show that the "standard" preprocessing is not sufficient for carrying out accurate subpixel analysis in a MODIS time series or for reliable radiometric rectification. The main reasons include raster-based processing not taking into account the changes in observation dimensions throughout the scene, and pixel mixing caused by the triangular point spread function (PSF). To resolve this, we propose a novel method based on the vector data model, in which each MODIS pixel is replaced by a polygon with its real size and orientation. Our results show this method yields a significant improvement in the radiometric fit of high-resolution and MODIS data.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6742
DOIs
Publication statusPublished - 2007
EventRemote Sensing for Agriculture, Ecosystems, and Hydrology IX - Florence, Italy
Duration: Sep 18 2007Sep 20 2007

Other

OtherRemote Sensing for Agriculture, Ecosystems, and Hydrology IX
CountryItaly
CityFlorence
Period9/18/079/20/07

Fingerprint

MODIS (radiometry)
Satellites
Imaging techniques
radiometric correction
high resolution
preprocessing
Time series
Pixels
pixels
polygons
Optical transfer function
point spread functions
imagery
Data structures
reflectance
Processing

Keywords

  • MODIS
  • Monitoring
  • Radiometric rectification
  • Reflectance
  • Spectral unmixing
  • Vector data model

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Kristof, D., Pataki, R., Neidert, D., Nagy, Z., & Pinter, K. (2007). Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images: Two Hungarian case studies. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6742). [67420J] https://doi.org/10.1117/12.739474

Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images : Two Hungarian case studies. / Kristof, Daniel; Pataki, Robert; Neidert, Dora; Nagy, Z.; Pinter, Krisztina.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6742 2007. 67420J.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kristof, D, Pataki, R, Neidert, D, Nagy, Z & Pinter, K 2007, Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images: Two Hungarian case studies. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6742, 67420J, Remote Sensing for Agriculture, Ecosystems, and Hydrology IX, Florence, Italy, 9/18/07. https://doi.org/10.1117/12.739474
Kristof D, Pataki R, Neidert D, Nagy Z, Pinter K. Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images: Two Hungarian case studies. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6742. 2007. 67420J https://doi.org/10.1117/12.739474
Kristof, Daniel ; Pataki, Robert ; Neidert, Dora ; Nagy, Z. ; Pinter, Krisztina. / Integrating temporal and spectral information from low-resolution MODIS and high-resolution optical satellite images : Two Hungarian case studies. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6742 2007.
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