Hello guys, i'm a newbie in computer vision, i want to ask a question about why
Sometimes you run into the situation, when you want to apply a threshold on the prediction
? what is this threshold for ?. I'hv been read this explanation at http://docs.opencv.org/2.4/modules/contrib/doc/facerec/facerec_api.html?highlight=facerecognizer "Setting the threshold", and it didn't explain why somtimes we need to setting the threshold for prediction. Since i know, thresholding is a method that create a binary image from grayscale image, why this threshold can determine whether a input face belongs to the training set or it is an unknown face?
Sorry for my bad english and my dumb question perhaps :D. Big regards.