Papers › Redundant Cross-Correlation for Drift Correction in SEM Nanoparticle Imaging
Redundant Cross-Correlation for Drift Correction in SEM Nanoparticle Imaging
Iago Bischoff Montenegro, Konrad Prikoszovich, Subin Lee, Kilian Quiring, Jonathan Zimmerman, Christoph Kirchlechner
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Scanning Electron Microscopy (SEM) is a widely used tool for nanoparticle characterization, but long-term directional drift can compromise image quality. We present a novel algorithm for post-imaging drift correction in SEM nanoparticle imaging. Our approach combines multiple rapidly acquired, noisy images to produce a single high-quality overlay through redundant cross-correlation, preventing drift-induced distortions. The preservation of critical geometrical properties and accurate imaging of surface features were verified using Atomic Force Microscopy. On platinum nanoparticles with diameters of 300 to 1000 nm, significant improvements in the mean-based signal-to-noise ratio (SNR) were achieved, increasing from 4.4 dB in single images to 11.3 dB when overlaying five images. This method offers a valuable tool for enhancing SEM image quality in nanoparticle research and metrology, particularly in settings without specialized hardware-based drift correction.
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