none A computer vision system driven by a robot was developed to enumerate and measure the size and number of eggs of a parasitic wasp, Apanteles glomeratus L. which were scattered on a slide. The results of the experiment showed that the reproducibility and accuracy of this system were as good as those achieved by human observation. The ability of the system to scan, enumerate and measure all the particles scattered in a large area can be easily applied to various objectives in different disciplines.