Analysis on the effectiveness of multitemporal COSMO-SkyMed images for crop classification

Rocchina Guarini; Lorenzo Bruzzone; Massimo Santoni; Luigi Dini

doi:10.1117/12.2193757

15 October 2015 Analysis on the effectiveness of multitemporal COSMO-SkyMed images for crop classification

Rocchina Guarini, Lorenzo Bruzzone, Massimo Santoni, Luigi Dini

Proceedings Volume 9643, Image and Signal Processing for Remote Sensing XXI; 964310 (2015) https://doi.org/10.1117/12.2193757
Event: SPIE Remote Sensing, 2015, Toulouse, France

Abstract

This study presents a preliminary assessment of the potentialities of the COSMO-SkyMed® (CSK®) satellite constellation to accurately classify different crops. The experiment is focused on the main crops grown in the agricultural region of Marchfeld (Austria) namely carrot, corn, potato, soybean and sugar beet. A Support Vector Machine (SVM) classifier was fed with temporally dense series of backscattering coefficients extracted from a stack of CSK® GTC products. In particular, twenty one CSK® dual polarization (11 HH, 10 VH) images were acquired over the site for the growing season (early April – mid October) in Stripmap Himage mode, with a nominal incidence angle at scene center of 40°. A comparison of the classifications obtained at the two different polarizations are reported and the result are analyzed in terms of the achieved accuracies. The SVM method was able to classify all five crop types with an overall accuracy of 81.6% (Kappa 0.77) at VH polarization and of 84.5% (Kappa 0.80) at HH polarization. Sugar beet, potato and carrot were accurately identified with OA never less than 83% at both polarizations, whereas corn and soybean showed remarkably differences in terms of producer’s and user’s accuracies, probably due to particular agricultural practices adopted for these two crop species. These first results show that the CSK® capability of acquiring temporally dense data sets can accurately identify several crop types.

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Rocchina Guarini, Lorenzo Bruzzone, Massimo Santoni, and Luigi Dini "Analysis on the effectiveness of multitemporal COSMO-SkyMed images for crop classification", Proc. SPIE 9643, Image and Signal Processing for Remote Sensing XXI, 964310 (15 October 2015); https://doi.org/10.1117/12.2193757

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KEYWORDS

Polarization

Synthetic aperture radar

Image classification

Agriculture

Image filtering

X band

Backscatter

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