What is thresh and accurancy_thresh?

I’ve been reviewing the video and the detailed notebook of the lesson3 for some time and I still don’t understand it, someone could explain it to me in the easiest way possible ?

Thank you very much :=)

pd: this is the code :slight_smile:

acc_02 = partial(accuracy_thresh, thresh=0.2)
f_score = partial(fbeta, thresh=0.2)
learn = cnn_learner(data, models.resnet50, metrics=[acc_02, f_score])