Optical sensoring of internal hollow heart related defects of potatoes*

Internal defects of potatoes are difficult to detect. Defect potatoes need to be removed as they cause complaints from customers and may spoil a whole patch in later food processing stages. We evaluated light transmittance for the sensing of internal defects in their different stages. The results are very promising: the classification rate for healthy and defect potatoes with skin is 90 % and without skin 92.5 %.