Caffe second "top" layer "Accuracy"

Question

Looking at the code "Accuracy", I see that there is an option for the second output / "top" for this layer.
What makes this second conclusion?

Answer 1

Looking at accuracy_layer.hppwhere the number of exits for a layer is defined, there is this comment:

// If there are two top blobs, then the second blob will contain
// accuracies per class.

So, the second "top"layer "Accuracy"simply reports the accuracy of each class.

, , "" ( , normalization: VALID ).