This project involves the development and realisation of a vision system for quality inspection of washed table potatoes.
Description of problemPotatoes are inspected manually based on various quality aspects. A differentiation is made bewteen geometrical features (size and shape) and external malformations based on colour and texture (decay, greening, damages, scab, growth lesions, etc.).
AimThe aim of the project is to develop an automatic read and grade station for table potatoes. These have washed before grading and are mostly free of adhering soil particles.
In this project, Pro-Pak International BV has been responsible for the mechanical aspects of the grading line. This involved transportation, stabilisation, feeding into the inspection system, the actual sorting of the potatoes and the operation of the machine. GreenVision is responsible for the development of the inspection unit, which consists of cameras, lighting, dedicated hardware for data-processing and the machine-user interface. A total view of the entire machine is shown below..
The computer analyses and sorts the potatoes into one of the pre-determined quality classes. The limits of the quality classes and the sort-sizes can be adjusted via the user interface. The potatoes leave the inspection line when they are dropped at the respective rejection stations.