G - Physics – 06 – K
Patent
G - Physics
06
K
354/55
G06K 9/00 (2006.01) G01N 21/89 (2006.01) G06T 7/00 (2006.01) B21B 38/00 (2006.01)
Patent
CA 1187996
-74- ABSTRACT OF THE DISCLOSURE A method and apparatus relating to the real time automatic detection and classification of character- istic type surface imperfections occurring on the surfaces of material of interest such as moving hot metal slabs produced by a continuous steel caster. A data cam- era transversely scans continuous lines of such a surface to sense light intensities of scanned pixels and gener- ates corresponding voltage values. The voltage values are converted to corresponding digital values to form a digital image of the surface which is subsequently processed to form an edge-enhanced image having scan lines characterized by intervals corresponding to the edges of the image. The edge enhanced image is thresholded to segment out the edges and objects formed by the edges are segmented out by interval matching and bin tracking. Features of the objects are derived and such features are utilized to classify the objects into characteristic type surface imperfections.
427150
Fant Karl M.
Fundakowski Richard A.
Levitt Tod S.
Overland John E.
Suresh Bindinganavle R.
Honeywell Inc.
Smart & Biggar
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