Identification of weed species using dimensionless analysis of leaves

To identify weed species in digital images, a dimensionless analysis of lea ves was tested at two locations in the Czech Republic with different soil a nd climatic conditions (Zabeice and Brevenec) in 1999 and 2000. Differences were determined among the following six weed species: Agropyron repens (AG RRE), Chenopodium album (CHEAL), Galinsoga parviflora (GALPA), Amaranthus r etroflexus (AMARE), Malva neglecta (MALNE), and Convolvulus arvensis (CONAR ). Discrimination was carried out according to the following leaf features: compactness, roundness, elongation, roughness and aspect (ratio of ellipse length and width at the equivalent area). it was possible to distinguish s ignificantly the presented weed species from each other. There was the only case (location Zabeice in 2000) when significance of differences between t he species GALPA and CONAR could not be assessed.