Technology and Methodology |
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The Quantitative Evaluation of Remote Sensing Data for Supervised Evidential Classification |
LI Hua-peng 1,2, ZHANG Shu-qing 1, SUN Yan 1,2 |
(1.Northeast Institute of Geography and Agricultural Ecology, CAS, Changchun 130012, China; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China) |
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Abstract DS (Dempster-Shafer) evidence theory has the capability of combining multisource data,and has been used more and more widely in the remote sensing classification field. However,it is not true that all the data sources can improve target category’s Basic Probability Assignment (BPA) so as to improve the remote sensing classification accuracy. The evaluation of the effect of combined evidence is therefore a key point in the application of DS evidence theory. This paper proposed the evidence combine index (eci) for evaluating the combined evidence. The authors chose band 5 and band 7 of TM image as verification data,applied the eci index to evaluate the combining effect,and used the variation of kappa coefficient before and after evidence combination classification to validate the eci. The results show that the eci index can reflect the effect of evidence combination and thus lay the foundation for evaluating supervised evidential classification quantitatively.
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Issue Date: 22 March 2011
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