Bayesian Decision Theory - gatech.edu
Receiver Operating Characteristic (ROC) Curve • Every classifier employs some kind of a threshold. • Changing the threshold affects the performance of the system. • ROC curves can help us evaluate system performance for differentthresholds. θω ω a = PP()/() 21 212 22 121 11 ()( ) b ()( ) P P ωλ λ θ ωλ λ − = −
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