Surface quality decision device and surface quality decision manner of run material

摘要

P To provide a method for determining a surface quality of a moving material and which can accurately determine the surface quality of the moving material. PSOLUTION: In the method, bright portions and dark portions are extracted from an image which is obtained by photographing a surface of the moving material by using respective thresholds of the bright portions and the dark portions being set beforehand and the extracted bright and dark portions are classified into one or more bright defects and one or more dark defects by using a plurality of feature quantities containing a dimension feature quantity and a brightness feature quantity, and the surface quality of the material is determined ON the basis of an occurrence density of the classified bright and dark defects. PCOPYRIGHT: (C)2011 and JPO& INPIT