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Nanoscale Imaging of Biological Tissues: Techniques, Challenges and Emerging Frontiers. [PDF]

Nanomaterials (Basel)
Kajla R, Leija-Cardenas R, Shivalingaiah MM, Shabbir MW, Ou Z.   +4 more
europepmc   +1 more source

Efficient, gigapixel-scale, aberration-free whole slide scanner using angular ptychographic imaging with closed-form solution. [PDF]

Biomed Opt Express
Zhao S, Zhou H, Lin SS, Cao R, Yang C.
europepmc   +1 more source

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Autofocusing for tissue microscopy

Image and Vision Computing, 1993
Abstract This paper describes the implementation of autofocusing for tissue microscopy. We first investigate the suitability of several criterion functions for the evaluation of image sharpness. Since tissue sections are invariably stained, we also discuss the selection of the colour component on which autofocusing will be performed.
Yeo, T., Ong, S., Jayasooriah, Sinniah, R.   +3 more
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A survey on ISAR autofocusing techniques

2004 International Conference on Image Processing, 2004. ICIP '04., 2005
Over many years of research, several ISAR autofocusing techniques have been proposed. Today, we can divide them into two main categories: parametric and non-parametric techniques. The prominent point processing and the phase gradient algorithm are two classical examples of non-parametric techniques, whereas the more recent image contrast and entropy ...
BERIZZI, FABRIZIO, MARTORELLA, MARCO, B. HAYWOOD, DALLE MESE, ENZO, S. BRUSCOLI   +4 more
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Autofocusing‐based phase correction

Magnetic Resonance in Medicine, 2018
PurposePhase artifacts due to B0 inhomogeneity can severely degrade the quality of MR images. The artifacts are particularly prominent in long‐TE scans and usually appear as ghosting and blur. We propose a retrospective phase correction method based on autofocusing.
Loktyushin, A., Ehses, P., Schölkopf, B., Scheffler, K.   +3 more
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Abruptly autofocusing circular swallowtail beams

Optics Letters, 2021
In this Letter, to the best of our knowledge, we report the first experimental demonstration of a new family of autofocusing beams, circular swallowtail beams (CSBs), based on the high-order swallowtail catastrophe, which were determined by potential functions depending on the state and control parameters.
Houan, Teng, Yixian, Qian, Yanping, Lan, Yiming, Cai   +3 more
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Multifocus autofocusing Airy beam

Journal of the Optical Society of America A, 2017
We propose a multifocus autofocusing Airy beam (MAAB) by modifying the frequency spectrum of a symmetric Airy beam (SAB) with a Gaussian band elimination filter. Unlike the original SAB, there are four off-axis foci at the autofocusing plane of the MAAB. The MAAB has a better abruptly autofocusing property than the original SAB.
Tong, Li, Fei, Zi, Kaikai, Huang, Xuanhui, Lu   +3 more
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Observation of abruptly autofocusing waves

Optics Letters, 2011
We report on the experimental observation of abruptly autofocusing waves. This interesting family of wave packets has been realized by using a radially symmetric Airy intensity distribution. As demonstrated in our experiments, these waves can exhibit unusual features, such as the ability to autofocus by following a parabolic trajectory toward their ...
Papazoglou, Dimitrios G., Efremidis, Nikolaos K., Christodoulides, Demetrios N., Tzortzakis, Stelios   +3 more
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Separation of antibiotics by autofocusing

ELECTROPHORESIS, 1990
AbstractThe autofocusing separation of nine antibiotics was investigated: tetracycline and chloramphenicol in large‐scale batches, and seven others in gram preparation amounts. All except one were found to be hetergeneous in autofocusing, and 2‐4 well‐characterized fractions emerged. These heterogeneities are described and the industrial utilization of
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