Shape dimensions

New Annotations:

I added three new annotations, Sphere, Cuboid and OBBDimensions to store the output of the ClusterShapeAnnotator and the SizeAnnotator. I didn't include dimensions for a box in the Cuboid annotation, since the SizeAnnotator works model independent and doesn't consider outputs from the ClusterShape.

Feel free to suggest changes.

robokudo/src/robokudo/types/cv.py

@@ -27,3 +27,11 @@ class ImageROI(robokudo.types.core.Type):
         super().__init__()
         self.mask = None  # Should be an OpenCV image
         self.roi = Rect()
+
+
+class BoundingBox3D(robokudo.types.core.Type):
+    def __init__(self):
+        super().__init__()
+        self.x_length = 0.0
+        self.y_length = 0.0
+        self.z_length = 0.0