N2V preprocess

[CatEek]

Description

Once #365 will be merged, the N2V masking will be applied in the Lightning module. However, this introduces some potentially difficult to maintain code:

careamics/src/careamics/lightning/lightning_module.py

Lines 203 to 212 in f13fbe9

	if is_tiled:
	x, *aux = batch
	if type(x) in [list, tuple]:
	x = x[0]
	else:
	if type(batch) in [list, tuple]:
	x = batch[0] # TODO change, ugly way to deal with n2v refac
	else:
	x = batch
	aux = []

We should discuss better alternatives!

[jdeschamps]

Can you explain what is happening here? I was having a look at the PR but I don't get why this changed.

[CatEek]

Basically, it's because currently relevant method of compose class outputs a list. Which is there to get rid of possible None values which are there because the targets might or might not be present. As per todo, this needs to be refactored during the dataset refactoring.