  Scientific applications often require an exact reconstruction of object
positions and distances from digital images. Therefore, the images need to be
corrected for perspective distortions. We present \textit{CameraTransform}, a
python package that performs a perspective image correction whereby the height,
tilt/roll angle and heading of the camera can be automatically obtained from
the images if additional information such as GPS coordinates or object sizes
are provided. We present examples of images of penguin colonies that are
recorded with stationary cameras and from a helicopter.
