Patch dataset based on labels.

[YerePhy]

Hi,

I would like to know if there is a way of replicating the behaviour of torchio.data.LabelSampler in MONAI. If not, it would be nice to implement this feature.

[wyli]

I'm not familiar with torchio, looks like it's a weighted cropping function. There are quite a few transforms in monai to achieve this, such as https://docs.monai.io/en/stable/transforms.html#randweightedcropd