Segmentation topic will appear for Camera nodes that have segmentation available.
Data will only be published if subscribers are connected.

Fixed issue where segmentation did not work unless recognition was also subscribed

World has been slightly modified to enable segmentation on the camera.
Test checks for width and height of recieved image, black pixels in the image (no object), red pixels in the image (object segmentation highlight).

Segmentation data is not available in first frame so set comparison was failing.