RoiSet facilitates object detection models

• created distinct generator class methods for RoiSet
• RoiSet.from_bounding_boxes can create RoiSet with just YXWH coordinates and no segmentation, e.g. as output from object detection models
• can also inspect and quantify overlap between and within RoiSet(s), at both bounding box and segmentation level
• can generate RoiSet from polygon segmentation e.g. in COCO segmentation models

model_server/base/validators.py

@@ -4,7 +4,7 @@ from .session import session
 
 def validate_workflow_inputs(model_ids, inpaths):
     for mid in model_ids:
-        if mid not in session.describe_loaded_models().keys():
+        if mid and mid not in session.describe_loaded_models().keys():
             raise HTTPException(
                 status_code=409,
                 detail=f'Model {mid} has not been loaded'