Accuracy and precision computation

2015 4 29
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I have Ground truth image and the result image(Both of them are binary images, the background is black and the crosses are white). I want to find the precision and values (TP,TN,FP, and FN). How can i calculate these values? if the crosses in the result images are't exactly in the same location in the original one but the difference is very small, can i create "error distance"? i mean if the obtained cross in this range, i can consider it as TP ! Plzzzzzz help meeeeeeeeeee Thank you in advance,

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Mohammad Abouali
Mohammad Abouali 2015-4-29

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Abdulrahman Mkaies
Abdulrahman Mkaies 2015-4-30
Sir, Can i put a distance error for the crosses in the result image ?? I mean, if the result cross around ( 10 pixels ) "for example" i want to put it as tp as well
Mohammad Abouali
Mohammad Abouali 2015-4-30
I cant really help on this, because, I don't what is your image, what do you mean by crosses and ...
Abdulrahman Mkaies
Abdulrahman Mkaies 2015-4-30
Its binary images (the background is black with white dots). The original image (Ground truth) has 10 crosses for example. and I have (result image) the same. I want to compare between them to get TP and TN etc, And if there any "little difference" in the location of the dots in the "results image", i want to consider it True Positive as well... Plz help :)
Salma Hassan
Salma Hassan 2018-1-22
[C,order] = confusionmat(...)
return Tp , Fp Fn , Tn what i should use to plot the Roc curve from these number

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