precision and recall computation

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soumya
soumya 2013-9-4
评论： Abdulrahman Mkaies 2015-4-30
i have a background subtracted image and its ground truth. How can i find the accuracy using precision and recall.precision=tp/(tp+fp),and recall=tp/(tp+fn). F measure=2*p*r/p+r. i want to get these values. please help

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Image Analyst
Image Analyst 2013-9-4
How are you defining true positive (tp), false positive (fp), and false negative (fn)? Is it just based on whether the difference between your output pixel and your ground truth pixel is zero or non-zero? Wouldn't accuracy just be the ratio of true positive pixels to the number of pixels in your image?
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Image Analyst
Image Analyst 2015-4-29
I don't have the slightest idea what you're talking about. You're not even the original poster for this message, that's a year and a half old. Please read this and start your own question.
Abdulrahman Mkaies
Abdulrahman Mkaies 2015-4-30
yes Sir, my question is here : http://www.mathworks.com/matlabcentral/answers/214319-accuracy-and-precision-computation , Could you give me your advise please ? , Thank you in advance

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