Overview

This node tracks the specified attributes for objects in the video. It can keep, remove or persist attributes from objects after they are seen for a certain duration. Use it to smoothen out object attributes when detections are intermittent.

Requires a AI Model Node before it in order to function properly. Having a Track Objects Node before is required if using Object Match Patterns else you can place it after the Merge Objects node.

Inputs & Outputs

Inputs : 1, Media Format : Raw Video
Outputs : 1, Media Format: Raw Video
Output Metadata : Filtered Objects Information

Properties

Property	Description	Type	Default	Required
`object_types`	If specified, only process objects of these types. Leave blank to process all objects. ex. `car`,`person`,`car.red`	model-label	null	false
`object_match_patterns`	Modify objects with IDs specified in the metadata attribute(s) defined by this pattern. Requires tracker prior to this node. ex. nodes...*.cur_dir1_objects	metadata-list	null	false
`tracked_attributes`	Keep/remove the specified attributes from object after they are seen/not seen for a certain duration. Format: `<attribute>` (specific attribute) or `*` (all attributes). Ex. `wrong_direction,object_of_interest`	string	null	true
`min_presence_secs`	Only process objects/attributes that have been seen for at least this duration.	float	0	false
`attribute_buffer_secs`	Keep the Tracked attributes on a object until they are not seen for this duration.	float	0	false
`object_history_duration`	Remember objects for this duration after they are last seen in case they reappear.	float	600	false

Metadata

Metadata Property	Description
`objects[].attributes[]`	Attributes of `objects` (added by the Model Inference Node ) are modified by this node