About school detection algorithms

Algorithm

Available on echograms of ping mode:

Description

Single beam algorithm

1 (Single beam)

An edge detection algorithm that produces 2D regions. The detection can be used with data collected by cruise scanning or with data where GPS data is absent and the platform is fixed.

See: About 2D school detection.

Cruise scanning algorithm

2, 3, 4 or 5
(Multibeam, H-mode, V-mode or S-mode)

An object detection algorithm that produces 3D regions. Only available if data was collected by cruise scanning.

Note: requires a moving platform.

See: About 3D school detection and 3D school detection algorithms.

Instrument scanning algorithm

3 or 4
(H-mode or V-mode)

An object detection algorithm that produces 3D regions. Only available if data was collected by instrument scanning.

Note: partitions the data into frames and you may need to prepare your data for this to succeed.

See: About 3D school detection and 3D school detection algorithms.

By ping algorithm

2, 3, 4 or 5
(Multibeam, H-mode, V-mode or S-mode)

An object detection algorithm that produces 3D regions with a specified region width, on a ping by ping basis. Available for specified pings or the displayed ping, for a fixed or moving platform.

See: About 3D school detection and 3D school detection algorithms.

Target-locked scanning algorithm

3 or 4
(H-mode or V-mode)

An object detection algorithm that produces 3D regions. Only available if data was collected by target-locked scanning.

Note: requires two variables, one of ping mode 3 (H-mode) and one of ping mode 4 (V-mode).

See: About 3D school detection and 3D school detection algorithms.