The invention relates to an automated method for inspecting and correcting the surfaces of flat materials, for example, leather. The invention particularly relates to a method for classifying surfaces of flat materials involving the following steps: (a) preparing a material; (b) optoelectronically sensing the surface of the material; (c) determining the number of defects; (d) determining the volume of defects and subsequently conducting an automatic classification of the flat materials based on the number and volume of defects.
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