The lower recognition rates for the x-ray system are due to lower resolution and higher noise in the digital images than in the film. In cases where the weevil was more developed, both methods resulted in nearly perfect detection. In both cases, the bulk of the errors were for infestations in which the weevil was in an early stage of development. The total error for the film was 3.0% vs 11.7% for the digital images. Recognition rates were better for the film images than the digital images. The images were then presented to human operators one kernel at a time to test how well they could identify the infestations. A total of 1672 kernels of wheat, 773 infested with granary weevils, were imaged on both film and using the new x-ray system. This system produces digital x-ray images which can be displayed on a computer screen, as opposed to film which is generally observed on a light table. Interpretive Summary: An x-ray inspection system was assembled with the specific goal of screening small agricultural commodities for quality control sampling such as wheat, for defects such as insect damage, as a possible replacement for film. ASAE Annual International Meeting.ASAE Paper #02-6093. X-ray inspection of wheat for granary weevils real-time digital imaging vs film. Submitted to: ASAE Annual International MeetingĬitation: Haff, R.P., Slaughter, D.C.
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