How to set unet_config, norm_type, y_range

Part 1 (2020)
1

Hey guys,

I’m trying to follow a guide to create a GAN to improve super resolution.

There is a line that goes like this:

def create_gen_learner():
    return unet_learner(dls_gen, arch, loss_func=loss_gen,config=unet_config(blur=True, norm_type=NormType.Weight, self_attention=True, y_range=y_range))

I didn’t understand what those mean:

y_range,
norm_type,
unet_config,

And how can I properly choose their values?

Thanks

2

because your output is an image so I think your y_range=(0,1). Y range mean the minimum and maximum value of your output, given that the model has a hint of how to tune their parameters and will give you a reasonable result in less time

norm_type=NormType.Weight . It is a normalization technique, with normalization, your model can generalize better the problem ( For example: your training data is mostly with Persian cat, but because it can generalize the problem, it can predict correctly for others breeds: Siamese cat, … )

unet_config: I think this parameter is deprecated, just pass directly the parameters you want

3

Thank you!

I’m still trying to understand the y_range.
In some tutorials that I’ve seen, the values were between -3. to 3.
How could that be, if the values are always between 0 to 1?