Attribute "FieldOfView" is undefined, image aspect ratio attribute is missing.

[RichardTea]

Is your feature request related to a problem? Please describe. FieldOfView is currently defined as a single angle. However it is not specified whether this angle is horizontal, vertical or corner-to-corner of the pixels of the related image.

All three of these FoV definitions are in common usage, and the various fields of photography and film use other conventions.

The Image Aspect Ratio or absolute size is required to convert between these different conventions.

Describe the solution you'd like Define the meaning of FieldOfView and add either Image Aspect Ratio or absolute size of the related captured or projected image.