How come the iPad only optimizes photos once?

[XciteMe]

What I mean is, I sync photos to iPad, it optimizes each one.

If I restore my iPad or delete the photos, and re-sync them later, it skips the optimization this time around.

What is going on here?

 

[Touchstone64]

The optimised photos are stored by iTunes.

 

[pfft]

Some people need to learn how to use Google.

 

[BergerFan]

In the same folder where you've stored your album folders, iTunes creates a folder called 'iPod Image Cache'. This is where your optimised images are stored.
They're still linked to the actual images they came from, so if you remove/add images to the original album folders, the changes will be replicated in the cache.