Issue 16

F. R. Renzetti et alii, Frattura ed Integrità Strutturale, 16 (2011) 43-51; DOI: 10.3221/IGF-ESIS.16.05

The tables below the group of pictures show the minimum and maximum values obtained for each indicator with 8 to 64 shades of gray.

Figure 11 : Duplex as received.

Figure 12 : Energy 8 gray levels.

Figure 13 : Energy 64 gray levels.

Figure 14 : Entropy 8 gray levels.

Figure 15 : Entropy 64 gray levels.

Figure 16 : Mutual information 8 gray levels

Figure 17 : Mutual information 64 gray levels.

Figure 18 : Contrast 8 gray levels.

Figure 19 : Contrast 64 gray levels.

INDICATOR

8 gray levels

64 gray levels

Min

Max

Min

Max

Energy Entropy

0,1843 0,7255 -2,6769

0,8906 4,9477 -0,0048 14,1111

0,1667 1,0808 -4,8366 1,8611

0,8361 5,1699 -0,1350

Mutual Information

Contrast

0

1,0020e+03

Table 1 : Minimum and maximum values assumed by the indicators.

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