Patch
A portion of the image that has been extracted and possibly edited or retouched and then reapplied to the original image.
Patch is a term used to describe a portion of an image that has been extracted
and possibly edited and then reapplied to the original image. A patch can be
used to cover unwanted areas (usually the nadir or down shot) with a photo or
even to add text or graphics to the image.
A patch does not need to originate from the panorama to be patched.