The invention relates to a
plastic bottle sorting method. The
plastic bottle sorting method comprises the following steps of orderly feeding, material
grinding, material conveying, material identification and material sorting. An industrial camera collects images and stores the images into image files in a two-dimensional matrix manner, images collected by an image collecting device is subject to treatment like median filtering,
edge detection, closed operation, contour extraction and center extraction through an industrial
personal computer, positions of all plastic bottles are determined, a
color discrimination zone is arranged on the side, close to a conveying belt, of a photographing zone, the plastic bottles in the discrimination zone are subject to HSV component extraction, all components and HSV components of the known transparent plastic bottles are compared, the
colored plastic bottles are further determined, the positions of the
colored plastic bottles are further determined, and the position information is sent to a lower computer; and the lower computer drives baffles at corresponding positions by controlling a driving device to remove the
colored plastic bottles. By means of the
plastic bottle sorting method, whether the plastic bottles have colors or not can be efficiently and accurately judged in an on-line and real-time manner, the positions of the colored plastic bottles are determined in real time, the colored plastic bottles can be accurately blocked out through a sorting mechanism, the sorting accuracy is high, safety and stability are achieved, and cost is low.