Fig. 2: Visualization and validation of spatial alignment.
From: Event-guided temporally super-resolved synchrotron X-ray imaging
a A frame from the GigaFRoST (GF) camera overlaid with “real" events before alignment. The red and blue dots represent positive and negative events, respectively. A local region is selected and magnified by a factor of 3 to better visualize the two modalities; the same zoomed-in area is used in (b) and (c). b The same GF frame with events after the alignment pipeline. c The GF frame overlaid with “synthetic" events used as ground truth for comparison. d Two-dimensional kernel density estimation (KDE) plots of positive events in the zoomed-in region from (b) and (c). e KDE plots of negative events in the same region.
