Machine Recognition of Navel Orange Worm Damage in X-ray Images of Pistachio Nuts

Insect infestation increases the probability of aflatoxin contamination in pistachio nuts. A non destructive test is currently not available to determine the insect content of pistachio nuts. This paper presents the use of film X-ray images of various types of pistachio nut to assess the possibility of machine recognition of insect-infested nuts. Histogram parameters of four derived images are used in discriminant functions to select insect-infested nuts from specific processing streams.