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Your search keyword '"Li-Hao Yeh"' showing total 5 results
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5 results on '"Li-Hao Yeh"'

1. 3D structured illumination microscopy with unknown patterns and a statistical prior

Author

Li-Hao Yeh, Laura Waller, and Nicole A. Repina

Subjects
Blind deconvolution, business.industry, Computer science, Resolution (electron density), Microscopy, Structured illumination microscopy, Computer vision, Artificial intelligence, Spatial frequency, business, Superresolution, Focus stacking
Abstract

We demonstrate resolution enhancement in 3D by structured illumination microscopy (SIM) with unknown illumination patterns. Our algorithmic self-calibration algorithm recovers both the image and the patterns, given a statistical prior.

Published
2017

2. Total-variation regularized Fourier ptychographic microscopy with multiplexed coded illumination

Author

Li-Hao Yeh, Laura Waller, David Ren, and Emrah Bostan

Subjects
Physics, business.industry, 02 engineering and technology, Inverse problem, 021001 nanoscience & nanotechnology, 01 natural sciences, Reconstruction method, Multiplexing, Ptychography, 010309 optics, symbols.namesake, Fourier transform, Optics, Temporal resolution, 0103 physical sciences, Microscopy, symbols, 0210 nano-technology, Variation (astronomy), business
Abstract

We propose an iterative Total-variation (TV) regularized reconstruction method for inverse problem of Fourier Ptychography with coded illumination. Our simulated and experimental results demonstrate the effectiveness of the new model.

Published
2017

3. 3D super-resolution optical fluctuation imaging (3D-SOFI) with speckle illumination

Author

Li-Hao Yeh and Laura Waller

Subjects
Physics, Speckle pattern, Optics, Optical imaging, business.industry, Resolution (electron density), Microscopy, Speckle noise, Speckle imaging, Spatial frequency, business, Superresolution
Abstract

We demonstrate a 3D super-resolution optical fluctuation imaging (SOFI) method using speckle illumination. Resolution enhancement of 1.6× is demonstrated in all three dimensions, as compared to traditional wide-field fluorescence images.

Published
2016

4. Experimental robustness of Fourier Ptychographic phase retrieval algorithms

Author

Laura Waller, Li-Hao Yeh, Ziji Liu, Michael Chen, Jingshan Zhong, and Lei Tian

Subjects
Background subtraction, symbols.namesake, Fourier transform, Robustness (computer science), Aperture synthesis, symbols, Spatial frequency, Phase retrieval, Regularization (mathematics), Algorithm, Ptychography, Mathematics
Abstract

We compare the results from several previously proposed phase retrieval algorithms using experimental Fourier Ptychography datasets and show importance of background subtraction and regularization for robustness with noisy imperfect data.

Published
2015

5. X-ray Phase Imaging and Computed Tomography with Sandpaper Analyzer

Author

Li-Hao Yeh, Aamod Shanker, Yao Hu, Dilworth Y. Parkinson, Laura Waller, Michael Chen, and Alastair A. MacDowell

Subjects
Physics, Spectrum analyzer, Digital image correlation, Radon transform, business.industry, X-ray, Computer vision, Iterative reconstruction, Tomography, Artificial intelligence, business, Phase retrieval, Sandpaper
Abstract

We experimentally demonstrate X-ray phase imaging and tomography with a sandpaper analyzer. Digital image correlation and filtered back projection algorithms are adopted for phase gradient calculation and three-dimensional reconstruction, respectively.

Published
2015

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