About region track detection

Region track detection is used to identify groups of 3D regions (schools) that show a pattern of systematic movement. The regions grouped into a region track are assumed to have been generated by a single object (school) moving through space.

Echoview allows you to detect region tracks from 3D regions in a scene. The resulting tracks are displayed as 3D region tracks in scene. The properties of 3D objects can be displayed on screen and exported for further analysis.

When detecting region tracks, one 3D region track group is created which includes all the 3D region tracks detected. This allows you to detect tracks several times with different settings, and each time a new 3D region track group is created. These groups can the be compared, either visually (on screen) or in exported region track analyses.

You can detect tracks on one class of regions only at any one time. A region class can represent schools that have been identified by detecting 3D schools on multibeam data.

Echoview will consider one point only in each 3D region when tracking. This will be either:

the center of mass, if an analysis variable is specified for the scene (on the Analysis page of the Scene Properties dialog box),
or the geometric center, if no analysis variable is specified.

In the example below several 3D regions are connected with a 3D region track, the result when you select Detect Region Tracks on the Scene menu.

Note: Compare with fish tracking. Region tracking is intended to track schools of fish detected on multibeam data, and fish tracking is intended to track individual fish detected on single beam data.

About region track detection

See also