Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Methods of Obtaining Topography

Methods of Obtaining Topography

Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Ptychographic reconstruction of pure quantum states.

Optics letters·2020

Same author

Tunable entanglement distillation of spatially correlated down-converted photons.

Optics express·2018

Same author

Experimental Minimum-Error Quantum-State Discrimination in High Dimensions.

Physical review letters·2017

Same author

Spatio temporal population dynamics of the invasive diatom Didymosphenia geminata in central-southern Chilean rivers.

The Science of the total environment·2016

Same author

Preparing arbitrary pure states of spatial qudits with a single phase-only spatial light modulator.

Optics letters·2013

Same author

Identification of genes related to nitrogen uptake in wine strains of Saccharomyces cerevisiae.

World journal of microbiology & biotechnology·2012

Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026

Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026

Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026

Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026

Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026

Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Aug 25, 2025

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Published on: August 30, 2013

Morphological variations to a ptychographic algorithm.

F Salinas, M A Solís-Prosser

|October 18, 2022

Summary

This summary is machine-generated.

Unconnected illumination shapes in ptychography (computational microscopy) improve convergence and accuracy compared to convex shapes. This computational study explores novel illumination patterns for enhanced imaging resolution.

More Related Videos

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Automated Charting of the Visual Space of Housefly Compound Eyes

Automated Charting of the Visual Space of Housefly Compound Eyes

Published on: March 31, 2022

Related Experiment Videos

Last Updated: Aug 25, 2025

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Published on: August 30, 2013

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

Automated Charting of the Visual Space of Housefly Compound Eyes

Automated Charting of the Visual Space of Housefly Compound Eyes

Published on: March 31, 2022

Area of Science:

Optics and Photonics
Computational Imaging
Materials Science

Background:

Ptychography is a key microscopy technique for high-resolution imaging.
It involves computational reconstruction from diffraction patterns of partially illuminated samples.

Purpose of the Study:

To numerically investigate the impact of different illumination shapes on ptychography performance.
To compare the efficacy of convex versus unconnected illumination patterns.

Main Methods:

Numerical simulations were performed to model ptychography.
Various illumination shapes were tested, including convex (circles, polygons) and unconnected (QR code-like) patterns.

Main Results:

Unconnected illumination shapes demonstrated superior convergence properties.
In specific scenarios, unconnected shapes also yielded higher accuracy in reconstructions.
Convex shapes showed limitations in convergence speed and accuracy.

Conclusions:

The choice of illumination shape significantly affects ptychography performance.
Unconnected, QR code-like illumination patterns offer a promising alternative for improved ptychography results.