Among the diseases affecting the commercial citrus production, the
citrus black spot (CBS) is considered to cause substantial losses. The
analyses of particles in suspension in the orchards and collected into
a disc have been applied as a preventive action trying to identify the
presence of fungus spores before symptom appearance. In this paper, we
show the results of several shape analysis methods applied to the
fungus, the first step to the aimed computer aided vision system,
capable to assist the identification process. Experiments and
comparative results among the methods are presented in this paper,
showing that better results were obtained applying the curvature
method