Example for spatial ICA. Performing ICA on the principal component images matrix SPCA. We show all spatial independent components that capture glomeruli. Top: ICA was run after exact PCA, bottom: ICA was run after approximate PCA with a 1% or 15%, respectively, pixel sample (covariation probabilities). Closest matches are placed in the same column.
Strauch and Galizia BMC Medical Informatics and Decision Making 2012 12(Suppl 1):S2 doi:10.1186/1472-6947-12-S1-S2