Figure 18From: An unambiguous cloudiness index for nonwovensFilter mask \(\hbar (x)\) of the Bessel band pass filter with frequency bounds \(\varrho _{0}=\frac{1}{2}~\upmu \text{m}^{-1}\) and \(\varrho _{1}=1~\upmu \text{m}^{-1}\)Back to article page