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Figure 4. Simulation of HAADF images with B-site/A-site intensity at 10% of A-site/B-site intensity of perovskite ABO₃, e.g., ferroelectric LaAlO₃ or NaNbO₃, and SNR values of 50, 15, and 5 to validate precision. (A) Schematic of a simulated 50 × 50 image and enlarged views of a single lattice for SNR values of 50, 15, and 5; (B) Average templates obtained using the Cross-Correlation method for images with different SNRs; (C) Final point detection results for images with varying SNRs; (D) Schematic illustration of atomic displacements measured by the software at the simulated interface for images with different SNRs, with the color bar indicating colors corresponding to different displacement directions; (E) Scatter plots of the differences between measured displacements and theoretical displacements for images with different SNRs, where the distance from the origin represents the Euclidean distance and the standard deviation indicates precision. HAADF: High-angle annular dark-field; SNR: signal-to-noise ratio. SD: standard deviation.