Hot rolled strip often produces surface defects in the rolling process. If it can not be found in time, a large number of waste products will be produced, which will bring losses to the enterprise. This paper introduces the surface defect detection system of hot rolled strip, which can quickly detect and identify various surface defects of hot rolled strip by using advanced machine vision technology, so as to guide production operation and control the source of defects in real time.<br>Keywords: machine vision; defect detection; algorithm; decision tree; sample training<br>
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