Figure 2
From: Fast PCA for processing calcium-imaging data from the brain of Drosophila melanogaster
Probability distributions. a) Image from the Drosophila2D movie, distribution of norm probabilities and distribution of covariation probabilities. A 5% pixel sample (Algorithm 1 for norms, Algorithm 2 for covariance) is superimposed in black. b) Drosophila3D. For visualisation, we discretised the continuous z-axis into 9 layers.