how to plot roc?
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Srinidhi Gorityala
on 29 Jan 2020
Commented: Star Strider
on 31 Jan 2020
Helo everyone...Iam working on a dataset of 200 images consisting of both pothole and non-pothole images for the pothole detection.Finally my output is a binary segmented image. I have calculated TP,TN.FP,FN at three thresholds respectively.
For example, if the pothole area is covering atleast 40% of black pixels it is a pothole else it is not a pothole. Similarly, the other two thresholds are of 50% and 60%. For this scenario, can any one help to plot roc curve.
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Accepted Answer
Star Strider
on 29 Jan 2020
2 Comments
Star Strider
on 31 Jan 2020
According to the Wikipedia article on the Receiver operating characteristic (and specifically this plot figure, since it is easier to see) the plot arguments are reversed.
Try this:
TPR = [0.71333333333 0.79333333333 0.86666666667];
FPR = [0.00000000000 0.00000000000 0.08860759494];
figure
plot(FPR, TPR)
grid
axis([0 1 0 1]) % Optional (Displays Entire Axis Limits)
It would help to have more data to better define the curve.
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