Processing of real-time X-ray images of randomly oriented and touching pistachio nuts for product inspection is considered. Processing to isolate individual nuts (segmentation) is emphasized. The processing consisted of a blob coloring algorithm, filters, and watershed transforms to segment touching nuts, and morphological processing to produce an image of only the nutmeat. Each operation is detailed and quantitative data for each are presented. These techniques are useful for many different product inspection problems in agriculture and other areas.
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