Fig. 9. Visualization of strain derived from tagged magnetization. (A) To obtain local strain from tagged magnetization images, triangular elements are defined by digitizing nodes at tag line intersections. (B) Strain is represented as a pseudosurface whose height denotes the amount of strain for each element of the mesh. (C) The surface is smoothed by the application of a bicubic spline algorithm. (D) The surface is rotated and viewed from above, where the pseudosurface becomes a color-coded strain map.