VidGrabbing and Full Res Photos



I’m overlaying a live feed from the iOS camera using ofVideoGrabber, and for part of the app I’m needing to then take a photo. At the moment I’m snapshotting from the video grabber, but it’s a bit too low res doing it that way, with it being 480x340.
Is that the max resolution for an iPad?
If so is there a way to save a photo to the documents directory and not the Photos library using ofxiOSImagePicker?