Table 3 Absolute percentage error for the estimated density for samples C1–C7.

From: Foam density mapping via THz imaging

Sample

C1

C2

C3

C4

C5

C6

C7

err

\(8.1 \%\)

\(6.1 \%\)

\(6.9 \%\)

\(4.9 \%\)

\(3.9 \%\)

\(1.1 \%\)

\(3.7 \%\)

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