Thing > Annotation > Region > Polygon > BoundingBox

Definition	A rectangular object in an image or video. At the moment it does not have features that would not make any sense on its parent type Polygon so technically we can do without BoundingBox, but it was introduced because the term is in widespread use.
URI	http://mmif.clams.ai/vocabulary/BoundingBox/v1
Also known as	https://mmif.clams.ai/0.4.0/vocabulary/BoundingBox/
Also known as	https://mmif.clams.ai/0.4.1/vocabulary/BoundingBox/
Also known as	https://mmif.clams.ai/0.4.2/vocabulary/BoundingBox/

Metadata

Metadata from Region

Property	Type	Description
timeUnit	String	Specifies which unit of time the measurement is based. Can be *seconds* or *milliseconds*, or in case of annotations on a VideoDocument, *frames*.

Metadata from Annotation

Property	Type	Description
document	ID	The identifier of the document that the annotation is over. This has to be defined either at the metadata level, in which case it has scope over all annotations of the same type in a view, or at the instance level, in which it has scope over just the single annotation.

Properties

Property	Type	Description
boxType	String	The type of BoundingBox. Mostly used for text boxes where we use the value text.

Properties from Polygon

Property	Type	Description
coordinates	List of pairs	The coordinates of the polygon, taking the top-left of the image as the origin (0,0). Unit used to measure the distance is the number of pixels. [Required]
timePoint	Integer	If on a video stream, the TimePoint that the BoundingBox occurs in.

Properties from Annotation

Property	Type	Description
document	ID	The identifier of the document that the annotation is over.

Properties from Thing

Property	Type	Description
id	ID	A unique identifier for the annotation or document. Uniqueness is relative to the view the annotation is in or the list of documents at the top level of a MMIF file. [Required]