The Help for the module (Click the “?” button under the pipeline at the bottom left) says:
[quote]AreaOccupied: The total area occupied by the input objects or binary image.
Perimeter: The total length of the perimeter of the input objects/binary image.
TotalImageArea: The total pixel area of the image. [/quote]
So added to this FAQ on measurement names, the former is the area occupied by the object “ColocalizedObjects” and the latter is simply the total area in pixels of the entire image.
Does that help?