Vision based measurement system to quantify straightness defect in steel sheets

Abstract

A non-uniform distribution of rolling pressure during steel lamination may produce flatness asymmetries in the steel sheets, causing a certain curvature on its edges. This deformation may cause stoppages in the rolling process, and damages in the machinery. A computer vision system for measuring this straightness defect is presented. This system shows the adaptation of well-known computer vision techniques to _t precision and real-time constraints. Some problems that arise during the implementation phase are also described, and the correspondent solutions outlined.