Thing > Annotation > Region > Polygon > BoundingBox


Definition A rectangular object in an image or video. It does not add new features compared to its parent type Polygon, but it ntroduced as a subtype because the term is in widespread use.
URI http://mmif.clams.ai/0.2.0/vocabulary/BoundingBox

Metadata

Metadata from Region

Property Type Description
unit String The unit used to determine boundaries. For text regions this is typically *offsets* to indicate character offsets, for images this is could be *pixels*, and for audio or video streams *seconds*, *milliseconds*, *timestamps* or *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

Properties from Polygon

Property Type Description
coordinates List of pairs The coordinates of the polygon. [Required]
timePoint ID 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]