If the orientation is landscape the shortest image side is considered the image height. If the orientation is portrait the shortest image side is considered the image width.
Orientation: Landscape
If the orientation is landscape the padding size is the distance between the top border and the QR code or the distance between the bottom border and the QR code.
Padding size allowed: 0 - image height * 0.2
Orientation: Portrait
If the orientation is portrait the padding size is distance between the left border and the QR code or the distance between the right border and the QR code.
Padding size allowed: 0 - image width * 0.2