+1 -- I'm finding this an issue too.
For example, if I take a photo of a magazine page where I only want to save a rectangular area for a certain article or advert. There isn't a way to crop the image immediately before saving it back to the note, which to me seems like missing functionality.
As @gazumped points out, you can then 'Annotate' each image once it's in the note to crop it to a simple rectangle, but having to make a second pass of the images seems like a slow workaround.
If a crop tool could be included at the camera stage that would be very helpful and speed up the c