Fig. 2
From: CIRCA: comprehensible online system in support of chest X-rays-based screening by COVID-19 example
CXR data heterogeneity. (a) The density plot in nUMAP coordinate space created by including images from 3 color-coded classes (Normal, Pneumonia, COVID-19) and three datasets: POLCOVID, COVIDx, and AIforCovid. (b) Results of grouping CXRs into three subtypes per class. NX represents subtype X from the Normal class, PX from the Pneumonia class, and CX from the COVID-19 class.
