Ptychography algorithm
WebThe 4D-STEM ptychography reconstruction of highly beam-sensitive materials requires powerful algorithms that are robust to high-noise data and large defocus values. The ability of various existing algorithms to manage ultra-low-dose large-defocus data should be explored, and new algorithms that can meet these requirements should also be developed. WebReceived Ph.D. from Northwestern University with a focus in algorithm development for inverse problems, deep learning, and computer vision. …
Ptychography algorithm
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WebMay 20, 2024 · By David Nutt. May 20, 2024. Facebook Twitter. In 2024, Cornell researchers built a high-powered detector that, in combination with an algorithm-driven process called … WebPtychography is a lensless method that is being used to image samples through a simultaneous numerical inversion of a large number of diffraction patterns from adjacent overlapping scan positions. ... Researchers could use this dataset to evaluate the performance of machine learning algorithms to classify various distracting activities and …
WebNov 6, 2024 · Numerical simulations. To validate the multi-wavelength method, we first performed the numerical simulations of broadband X-ray ptychography with source energy centered at 8.8 keV. A synthetic sample as shown in Fig. 1 ( a) was generated from the design file of an integrated circuit with a total thickness of 4.4 µm. WebFourier ptychography is a new type of computational imaging technology, which uses a stack of low‐resolution images obtained from overlapped apertures (or equivalent) to reconstruct super‐resolved image. ... The results show that the proposed algorithm can accurately find the aperture position and improve the reconstruction quality.
WebSpectroscopic ptychography is a powerful technique to determine the chemical composition of a sample with high spatial resolution. This paper presents a novel algorithm to iteratively solve the spectroscopic blind ptychography problem. WebApr 7, 2024 · Fourier ptychography (FP) can be a promising technique for long-range and high-resolution imaging. In this work, we explore reconstructions with undersampled data for meter-scale reflective based ...
WebNov 6, 2024 · Numerical simulations. To validate the multi-wavelength method, we first performed the numerical simulations of broadband X-ray ptychography with source …
WebJul 31, 2024 · The iterative method for reconstruction used the ptychography algorithm with the invMS approach 22 is summarized below. The multislice method is widely used in electron microscope simulations. fred minnick top 2022WebDec 22, 2024 · In the mid-2000s, ptychography was ‘re-discovered’ and started to pick up momentum, essentially triggered by the theoretical introduction of a first iterative algorithm (the PIE) 10,11. blink brow bar promo codeWebJan 1, 2024 · The ability to replace iterative algorithms with CNNs and perform real-time atomic imaging from coherent diffraction patterns is expected to find applications in the physical and biological sciences.} ... Electron ptychography achieves atomic-resolution limits set by lattice vibrations journal, May 2024. Chen, Zhen; Jiang, Yi; Shao, Yu-Tsun; blink brow bar newcastlehttp://xrm.phys.northwestern.edu/research/pdf_papers/2009/maiden_ultramic_2009.pdf fred minnick whiskey clubWebJul 7, 2024 · We derive a set of ptychography phase-retrieval iterative engines based on proximal algorithms originally developed in convex optimization theory, and discuss their connections with existing ones. The use of proximal operator creates a simple frame work that allows us to incorporate the effect of noise from a maximum-likelihood (ML) principle. blink brow bar vancouverWebPtychography Diffractive imaging abstract The ptychographical iterative engine (or PIE) is a recently developed phase retrieval algorithm that employs a series of diffraction patterns … blink brow bar tunbridge wellsWebJun 12, 2024 · Electron ptychography, however, can potentially use the entire diffraction patterns either via a Wigner-distribution deconvolution (WDD) 12,13 or iterative algorithms 14,15 in a way that can ... fred minnick seagrass