Hello,
You have 2 ways to compute the stats:
- From label image (i.e. a raster of integer values, “labels”, that annotate each objects)
- From vector (i.e. each polygon has a “label” field)
You can chose either option 1 or 2 selecting the “Type of input for the zone definition”.
It looks like QGIS complains when you don’t set both vector and label image? If so this is a bug related to the application parameters update… it should not use the label image if “vector” is the type of input for zone definition.
Can you give a try with the otb application run from gui? (e.g. mapla or otbgui_xxx)