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Last Post 11 Oct 2017 12:37 PM by  MariM
SVM
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Bisma Qazi



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08 Oct 2017 07:22 AM
    Can I get to know that how does SVM module in ENVI estimate the probabilities ?
    Although, a reference (Wu et al., 2004) has been provided in the help contents but I am unable to follow which method does ENVI implement for this?

    MariM



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    11 Oct 2017 12:37 PM
    ENVI's SVM implementation uses LibSVM. You might refer to the paper titled LIBSVM: A Library for Support Vector Machines.

    You can find a copy here:
    http://dns2.asia.edu.tw/~...Sys%20Tec2,%2027.pdf

    Details of Probability Estimates were described in Section 8 of the paper (p22-24). On Page 22, "after collecting all rij values, Wu et al. [2004] proposed several approaches to obtain probability. In LIBSVM, we consider their second approach to solve the optimization problem.

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