Scatter plot of sparsity vs. linearity for subregions of cirrus in the example Spider field. Each marker represents a subregion within which the statistics have been evaluated. The left panel shows the distribution of reduced statistics, ${\tilde{s}}_{21}$ and ${\tilde{s}}_{22}$, after a weighted average over by all scale combinations with j₂ > j₁. The right panel shows s₂₁ vs. s₂₂ for one of the combinations with strong correlations (j₁ = 1, j₂ = 3). In both cases, the sparsity and linearity show strong correlations quantified by high Pearson correlation coefficients. Furthermore, some scale combinations are more relevant than others in describing the continuous changes in cirrus morphology.