Page 76 - Riem-Vol6_nº3

421 IBRACON Structures and Materials Journal • 2013 • vol. 6 • nº 3
A. P. Martins | J. C. Pizolato Junior | V. L. Belini
rors. The pachymeter, in turn, presented readings directly on
the instrument screen, with the disadvantage of the necessity
of manual positioning over the crack on the specimen. The re-
peatability errors on the measuring of the pachymeter and on
Figure 10 – Processing of an image in the mobile phone with Windows Phone System: (a) system
selection of image capture to be processed (wPhoneFissuras); (b) System selection (Home screen)
and of threshold to the image processing to be captured; (c) Captured image Processing
(Monitoring); (d) Binary image of crack and the introduction of outcomes of monitored image pixels
A
C
B
D
the proposed system, for each phase of the crack opening are
illustrated in the Figure 12.
The outcomes of Figure 12 indicates that the repeatability er-
rors of the pachymeter were higher than the ones presented by