How to calculate accuracy or evaluate my face detection output

Hi,

I am able to detect faces captured by webcam. How can I know the accuracy rate of my output.

Thanks in advance

Answer 1

[Walter Roberson]

You need to have a set of validation images whose classification is known, and which are not used to test or tune the algorithm. After you have debugged the classification, you run the classification on the validation set without telling the algorithm which class they are, and then observe what fraction of them it gets right.

[Noopur]

Thanks for the reply. Going to try it.

Answer 2

[Image Analyst]

You might want to read up on ROC curves: https://en.wikipedia.org/wiki/Receiver_operating_characteristic

[Noopur]

Thanks for the link. Its relevant to the work. looking into some more theory behind it. Thanks again.