Duckweed Detection and Counting of Thalli

Monitoring growth and area over time

Equipment: Scanalyzer LS10 or LS30

Sensor: RGB Camera (VIS)

Software / Software Version: LemnaGrid / V7.0.9999.26694

Detection of area covered by Duckweed

The LemnaGrid workflow is shown below

Calculating area

Counting the number of Thalli

The LemnaGrid workflow is show below

Counting Thalli

Detection of area covered by Duckweed


A row of 12 images of Lemna has been tested, each showing between 9 and 66 thalli. On average, the difference between the real count of thalli and the number of thalli calculated was +0.92, the worst cases being - 4 and +6.