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Title: Real time automated inspection

Abstract

A method and apparatus are described relating to the real time automatic detection and classification of characteristic 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 camera transversely scans continuous lines of such a surface to sense light intensities of scanned pixels and generates 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 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. 43 figs.

Inventors:
; ; ; ; ;
Issue Date:
OSTI Identifier:
7147177
Patent Number(s):
4519041 A
Application Number:
PPN: US 6-374373
Assignee:
Honeywell Inc., Minneapolis, MN (United States)
DOE Contract Number:  
FC07-79CS40242
Resource Type:
Patent
Resource Relation:
Patent File Date: 3 May 1982
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CASTINGS; DEFECTS; ON-LINE MEASUREMENT SYSTEMS; DESIGN; STEELS; CASTING; COMPUTERIZED CONTROL SYSTEMS; DETECTION; IMAGE PROCESSING; OPERATION; REAL TIME SYSTEMS; ALLOYS; CONTROL SYSTEMS; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; ON-LINE CONTROL SYSTEMS; ON-LINE SYSTEMS; PROCESSING; 420500* - Engineering- Materials Testing; 320303 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes

Citation Formats

Fant, K M, Fundakowski, R A, Levitt, T S, Overland, J E, Suresh, B R, and Ulrich, F W. Real time automated inspection. United States: N. p., 1985. Web.
Fant, K M, Fundakowski, R A, Levitt, T S, Overland, J E, Suresh, B R, & Ulrich, F W. Real time automated inspection. United States.
Fant, K M, Fundakowski, R A, Levitt, T S, Overland, J E, Suresh, B R, and Ulrich, F W. Tue . "Real time automated inspection". United States.
@article{osti_7147177,
title = {Real time automated inspection},
author = {Fant, K M and Fundakowski, R A and Levitt, T S and Overland, J E and Suresh, B R and Ulrich, F W},
abstractNote = {A method and apparatus are described relating to the real time automatic detection and classification of characteristic 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 camera transversely scans continuous lines of such a surface to sense light intensities of scanned pixels and generates 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 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. 43 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {5}
}