Improved Multiscale Entropy Technique with Nearest-Neighbor Moving-Average Kernel for Nonlinear and Nonstationary Short-Time Biomedical Signal Analysis

Figure 7

(a) Top panel shows a representative example of a single rotor. Pixel locations “1” represent rotor core region and “2” represent rotor periphery; bottom panel shows corresponding voltage traces at those pixel locations. (b) Normalized 2D MSE maps; top panel with scale factor τ = 1; middle panel with τ = 2; bottom panel with τ = 3, correctly identifying rotor core regions; (c) normalized 2D SE map with lower SE values at the rotor core.

(a) Raw data from optical mapping

(b) 2D MSE maps

(c) 2D SE map