SELECTION OF FEATURES FOR A PATTERN CLASSIFIER TO IDENTIFY WELD DEFECTS IN HY80 WELDMENTS

Authors
  1. Matthews, J.R.
  2. Sutherland, G.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The construction and repair of submarine pressure hulls calls for very high quality welding accompanied by detailed non-destructive inspection. Recent interest in applying condemnation criteria based on defect type as well as severity has defined the need for automated inspection and data retrieval as well as identification of defect type. Consequently, a long term pattern recognition study has been undertaken to identify defects such as cracks, slag or porosity. A library of weld defects has been created including cracks at orientations other than 90 degrees to the surface. Optimal features have been determined for the identification and classification of the various defects. It has been demonstrated that cracks are separable from slag and holes and that cracks of different length and orientation can also be separated from slag defects.
Report Number
DREA-TC-87-309-SES-4-PAP-2 — @Paper presented at the Canadian Forces/CRAD Meeting, Dartmouth, 28-29 May 1987; CONTAINED IN 88-02311
Date of publication
01 Jan 1985
Number of Pages
11
DSTKIM No
88-02298
CANDIS No
55522
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: