public const string IMAGE_ORIENTATION
Represents the 'Orientation' tag from EXIF.
Defines how the image should be rotated and mirrored for display. (string)
This tag has a predefined set of allowed values: "rotate-0" "rotate-90" "rotate-180" "rotate-270" "flip-rotate-0" "flip-rotate-90" "flip-rotate-180" "flip-rotate-270"
The naming is adopted according to a possible transformation to perform on the image to fix its orientation, obviously equivalent operations will yield the same result.
Rotations indicated by the values are in clockwise direction and 'flip' means an horizontal mirroring.