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This saves gigabytes of recorded data and makes final processing and counting much, much easier.

In this case DIDSON can implement a motion detection algorithm and record data only while a fish or a fish-sized object passes through its field of view. Some rivers and streams in other states may have a very small run – maybe a 1000 fish in a two-month period. The sonar can be left unattended while it collects data in preset patterns and times. In Alaska where fish are counted in the thousands per hour, the timer mode allows the DIDSON to count fish in samples of time at different frequencies and ranges within each hour, or day. As a result many features have been developed to allow one to record only the data of importance. The icons on the far right allow one to subtract the static background from the image, apply the autofish count algorithm, enhance imaging moving objects, apply transmission loss, and generate an advanced echogram.ĭIDSON records video-quality data and thus can require a lot of disk space (1.8 gigabytes/hour). Files are played back using the folder icon to find the file, the sideways arrows to quickly move through files within a folder, and the playback icons to play the file forwards, backwards, pause, or loop it. One way to record a file is to click on the red button. The toolbar has a number of control features. DIDSON purchasers have obtained free upgrades to the latest version of software at no additional cost. The software has many more features than we can explain here. A number of software features enhance the operation of DIDSON for specific applications. The software runs on Windows and allows a laptop to be the control and display console. Topside display and control software comes with all of our DIDSONs. DIDSON has user friendly software to get the sonar imaging work done.