• ObjectTrackingData contains information about objects that are tracked over time. Tracked objects are also known as tracklets.
• ObjectTrackingData is returned from VideoObjectTracking and other functions.
• For a tracked object tracked, tracked[elem] gives objects and their properties.
• Possible values for elements elem are:
• label corresponding to a specific label
  prop property prop for given tracklets
  label->prop properties for the given label
• A list of available labels label can be obtained using tracked["Labels"].
• Global properties include:
• "Labels" list of tracked labels
  "Length" number of times, frames or steps
  "TimedQ" returns True if times are present
  "Times" times for each frame, if present
  "Type" type of tracked objects
• Possible types are "BoundingBoxes", "Points" and "LabelMatrices".
• Time-related properties, given as a time series for each label:
• "FirstFrame" first frame in which a label appears
  "FirstTime" first time in which a label is present
  "LastTime" last time in which a label is present
  "TimeInterval" first and last time in which a label is present
• Properties for "BoundingBoxes" type objects include:
• "BoundingBox" bounding boxes as Rectangle [{x_min,y_min},{x_max,y_max}] (main)
  "Dimension" dimensions given as {width,height}
  "Position" center of the bounding box given as {x,y}
  "MaxDimension" max dimension for each label given as {maxWidth,maxHeight}
  "SubVideo" video of the tracked bounding boxes for each label
• Properties for an object of the "Points" type include:
• "Point" points for for each time given as Point [{x,y}] (main)
  "Position" positions for each time given as {x,y}
• Properties for an object of the "LabelMatrices" type include:
• "Matrix" tracked label matrices (main)
  "ColorizedImage" colorized version of the label matrices
• For timed ObjectTrackingData , the type-specific properties are returned as TimeSeries .
• With no times present, time-related properties are equivalent to indices. Other type-specific properties are returned as lists.
• The following operations on ObjectTrackingData are supported:
• Normal [tracked] the main property for each type with times if available
  Dataset [tracked] a dataset of the main property for each type with times if available
  Tabular [tracked] a tabular of the main property for each type with times if available
  TimeSeries [tracked] a time series of the main property for each type if available
  EventSeries [tracked] an event series of the main property for each type if available

Basic Examples  (1)

Scope  (8)