TIRE EXTERNAL-SCRATCH MONITORING DEVICE, TIRE EXTERNAL-SCRATCH MONITORING METHOD, AND PROGRAM

A tire external-scratch monitoring device according to the present disclosure includes a controller configured to acquire an image of a tire, identify one or more reference positions on an outer surface of the tire as appearing in the image, detect external-scratch on the outer surface of the tire as appearing in the image, and output external-scratch information including positional information for the detected external-scratch relative to the one or more reference positions on the outer surface of the tire.