The image is flipped on its horizontal axis
The orientation of the image is without any rotation.
The image is rotated by 180 degrees
The image is rotated 270 degrees clockwise
The image is rotated by 90 degrees clockwise
The image is rotated by 90 degrees clockwise and flipped on its horizontal axis
The image is rotated by 90 degrees clockwise and flipped on its vertical axis
The orientation of the image is unknown
The Image is flipped on its vertical axis
The orientation of an image is defined as the location of it's x,y origin. More than rotation, orientation allows for every variation of rotation, flips, and mirroring to be described in 3 bits of data.
A handy primer to orientation can be found at