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/0.3.0/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
| 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. [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] |