ello teacher, I have been in contact with neural networks not long ago, I have two questions about this paper

[dyz111]

First, the input of the network is an oct grayscale image. What do you mean by spectral domain features? How to show it on the oct image? Or is it an abstract feature?

Second, the later ablation experiment said to change its frequency, so what is the frequency? What parameter is it?

Looking forward to your reply!