Here are some MATLAB tools to plot NIST's SRE decision cost function (DCF) as a function of the target prior. These tools can be used to examine and compare, over a range of operating points: - the discrimination of detector scores with
*minimum*DCF, - and the calibration of detector scores in log-likelihood-ratio form, with
*actual*DCF.
> help normDCF_plot > help fast_minDCF > help fast_actDCF or type > normDCF_plot to generate a few demo plots. |