Kavli Affiliate: David A. Muller
| First 5 Authors: Christian K. Belardi, Christian K. Belardi, , ,
| Summary:
Multislice electron ptychography (MEP) is an inverse imaging technique that
computationally reconstructs the highest-resolution images of atomic crystal
structures from diffraction patterns. Available algorithms often solve this
inverse problem iteratively but are both time consuming and produce suboptimal
solutions due to their ill-posed nature. We develop MEP-Diffusion, a diffusion
model trained on a large database of crystal structures specifically for MEP to
augment existing iterative solvers. MEP-Diffusion is easily integrated as a
generative prior into existing reconstruction methods via Diffusion Posterior
Sampling (DPS). We find that this hybrid approach greatly enhances the quality
of the reconstructed 3D volumes, achieving a 90.50% improvement in SSIM over
existing methods.
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