Page 303 -
P. 303
292 Appendix A. CD Datasets
A.2 Clusters
The Clusters.xls file contains four sets with two-dimensional (A, B) sets of points
with different cluster shape:
"Glob" : globular clusters data
"Filam" : filamentary clusters data
"+Crossw: + shaped Cross data
"xCross" : x shaped Cross data
Author: JP Marques de Si, Engineering Faculty, Oporto University.
A.3 Cork Stoppers
The Cork Stoppers.xls file contains measurements performed automatically by an
image processing system on 150 cork stoppers belonging to three classes. Each
image was digitised with an adequate threshold in order to enhance the defects as
shown in Figure A.1.
Figure A.1. Example of a cork stopper image at the left and the corresponding
binary image of the defects at the right.
The first column of the Cork Stoppers.xls spreadsheet contains the class labels
assigned by human experts:
wl - Quality Super (nl=50 cork stoppers)
@ - Quality Normal (n2=50 cork stoppers)
cy - Quality Poor (n3=50 cork stoppers)
The following columns contain the measurements performed automatically:
N : Total number of defects
PRT : Total perimeter of the defects (in pixels)
ART : Total area of the defects (in pixels)