Improved test coverage for roi_objects
Improved test coverage for roi_objects

stiphyMT/plantcv,danforthcenter/plantcv,stiphyMT/plantcv,danforthcenter/plantcv,AntonSax/plantcv,stiphyMT/plantcv,jshoyer/plantcv,jshoyer/plantcv,AntonSax/plantcv,danforthcenter/plantcv