Sorting Raisins

Impurity detection for sorting raisins

Perception Park, chemical imaging, chemical color imaging, machine vision, quality assurance, PAT, QbD, sorting, food sorting, lebensmittel sortierung, sortierung, sortiermaschine, kartoffel sortierung, pharmaceutical, image processing, Meat, Fleisch, halal, kosher, hyperspectral imaging, spectral imaging, Rosinen, raisins, raisin sec, la pasa, uva pasa, uva passa, uvetta, zibibbo, passa de uva, rodzynek, rodzynka, изю́м, изю́минка, кишми́ш, 葡萄干, 葡萄乾, pútáogān, 烹, kuru üzüm


The Perception of the month July shows the possibility to scan raisins. While it is possible to detect the stems of raisins, the most important advantage is that unknown impurities like plastics, glass, cardboard or cigarette filters can be detected too. These unknown impurities will always be displayed in black color.

This offers the great possibility to differentiate between disgusting materials and harmful impurities. Following an ejection unit can be triggered by different intensity.

Data were captured with an Perception System in combination with a hyperspectral NIR camera of the German company Inno-Spec.