[Feature Request] Reverse Normalize

[karandwivedi42]

Useful when visualizing the exact input to the network (for example after random crop).
Just a reverse of normalize, I can raise a PR if you want to incorporate this.

[alykhantejani]

I'm not sure useful this would be in general, it seems like it would be used only for debug purposes. I'd lean against adding it, if this is the only use case - especially as its quite easy for users to implement when and if they need it.

[karandwivedi42]

Sure, Thanks!