Polishing method and system based on metal ingot polishing information visual identification

The invention discloses a polishing method and system based on metal ingot polishing information visual identification. The polishing method comprises the steps that edge detection is conducted on a metal ingot image to obtain an edge detection image containing burr positions; after polygon fitting is carried out on the edge detection image, angular points of a polygon and end points of burr positions are extracted, and polishing reference points of the metal ingot are obtained; and the metal ingot is polished according to the polishing reference points, the polished metal ingot image is detected to obtain residual burr information, the polishing reference points are optimized according to the residual burr information, and polishing of the metal ingot is completed according to the optimized polishing reference points. The polishing reference points of the metal ingot entering the visual detection range are continuously extracted in the running process of the non-ferrous metal ingot casting line, and real-tim