Supported validator options are (array)allowedOrientations with one or two out of 'square', 'landcape' or 'portrait'.
*Example*::
[at]Flow\Validate("$image", type="\Neos\Media\Validator\ImageOrientationValidator",
options={ "allowedOrientations"={"square", "landscape"} })
this would refuse an image that is in portrait orientation, but allow landscape and square ones.