System for the identification of defects in natural and synthetic surfaces

摘要

System for locating defects in natural and synthetic surfaces using pattern-recognition methodology. The defects are marked on the surface by outlining their area of influence. The type of defect is also marked on the skin by means of a suitable symbol which is connected with the degree of gravity of the defect. The defect is digitized and identified in an automated manner, using a two-dimensional optical video camera to acquire an image of the surface. Procedures are then applied with a view to vectorization of the contour of the defect and recognition of the symbol based on its geometrical characteristics. Visual inspection of either natural or synthetic surfaces may successfully be applied in the sectors of hides and tanning, ornamental rocks, cork-bark agglomerates, wood and metallomechanics. The footwear industry is the principal beneficiary of this system.