twerppoet
iPad Fan
. . .Thus if you work on the photo on your iPad it will not be on your computer so I would presume that if you do the above re synch you will lose the work product on the iPad.
If you edit an album photo in the Photos app the result gets copied to the camera roll. The original photo is not affected. Since the result in in the camera roll, it will not be affected by syncing with iTunes.
On the other hand if you edit a photo that is in the Camera Roll the old version is replaced, sort of. The editing is non-destructive; which means you can always open it in edit mode again and revert to the original.