is it possible to plot ROC curve for train cascade object detector result?

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matlab22 2016-5-8

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评论： sunaina bhateja 2018-1-22

hello, i trained a classifier using traincascadeobjectdetector function, how to evaluate it and plot a ROC curve ?

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Image Analyst 2016-5-8

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To plot ROC curves just keep track of false positives, false negatives, true positive, and true negatives, and then plot the True positive rate vs. False positive rate. You will need to tweak some parameters in your detection algorithm to vary the rates, otherwise you'll just have a single point, not a whole curve.

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Image Analyst 2016-5-9

I can't tell you how to determine if your algorithm predicts correctly or not. It's you who must know that, or figure it out. It depends on what your algorithm does and what you know about the ground truth.

matlab22 2016-5-12

Thank you, i see the results, but how i calculate the values, the algorithme TrainCascadeObjectDetector just showing positive and negative samples used for each stage?

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matlab22 2016-5-24