Sample image frame captured from DIDSON visual sonar with a fish in

A DIDSON image of fish at high passage rates.

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Sound sees more: A comparison of imaging sonars and optical cameras for estimating fish densities at artificial reefs - ScienceDirect

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Overview of intersection over union.

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Example DIDSON image with ground-truthed fish count = 2. Detections

Automated acoustic method for counting and sizing farmed fish during transfer using DIDSON

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Fish abundance estimation from multi-beam sonar by improved MCNN

Sonar Tools: DIDSON, Alaska Fisheries Sonar, Alaska Department of Fish and Game

Use of high-frequency imaging sonar (DIDSON) to observe fish behaviour towards a surface trawl - ScienceDirect

Tail‐Beat Patterns in Dual‐Frequency Identification Sonar Echograms and their Potential Use for Species Identification and Bioenergetics Studies - Mueller - 2010 - Transactions of the American Fisheries Society - Wiley Online Library

A method to estimate the abundance of fish based on dual-frequency identification sonar (DIDSON) imaging