Modify photo selected by UIImagePicker before it's used in the move-and-scale screen

Question

Hello,

as you probably know, the UIImagePickerController in the UIKit Framework allows the user to take a photo which is then handed over to my App for further processing. If the property allowsEditing is set to YES, the user is allowed to move and scale the photo after taking it.

What I'd like to accomplish is to modify the photo in my code BEFORE the user is presented with the move and scale screen. This is because I'd like to add some visual effects to the photo and the user should be able to move and scale with these effects already applied to the photo.

I know that there's the cameraOverlayView property, but this is not useful in my case as far as I'm concerned.

Any ideas?

Thanks, Thomas