Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Filtration00:53

Filtration

Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
Aliasing01:18

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
Passive Filters01:27

Passive Filters

Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff frequency...

You might also read

Related Articles

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

Sort by
Same author

APASL clinical practice guidelines on the management of chronic hepatitis B infection: a 2026 update.

Hepatology international·2026
Same author

Untrained Position-Encoded Multilayer Perceptron Network for Structured Illumination Microscopy Reconstruction.

Chemical & biomedical imaging·2026
Same author

Problematic Pornography Use Among Indian Adults: Patterns, Preferences, Motives, Psychosocial Impacts, and Support Strategies.

International journal of sexual health : official journal of the World Association for Sexual Health·2026
Same author

A Plasmon-Driven Transparent and Flexible Microsupercapacitor for Dual Solar-Hydrovoltaic Energy Harvesting.

Nano letters·2026
Same author

Effective SU(2) gadget: holonomic walk on higher-order Poincaré sphere.

Optics express·2026
Same author

Platelet count, liver and spleen stiffness-based model reliably identifies esophageal varices needing treatment in acute-on-chronic liver failure.

Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology·2026
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

Related Experiment Video

Updated: May 29, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Selective edge enhancement using anisotropic vortex filter.

Manoj Kumar Sharma1, Joby Joseph, Paramasivam Senthilkumaran

  • 1Indian Institute of Technology Delhi, New Delhi, India. manu.1981@yahoo.co.in

Applied Optics
|September 28, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel anisotropic vortex phase mask for selective edge enhancement in optical image processing. The method uses a sine function to control anisotropy for targeted edge emphasis in specific regions and directions.

Related Experiment Videos

Last Updated: May 29, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Area of Science:

  • Optical Image Processing
  • Diffractive Optics
  • Image Enhancement

Background:

  • Selective edge enhancement is crucial in optical image processing for emphasizing specific object features.
  • Conventional methods may lack the precision for targeted edge emphasis.

Purpose of the Study:

  • To propose a new method for selective edge enhancement of amplitude objects.
  • To introduce anisotropy into a conventional vortex mask for controlled edge emphasis.

Main Methods:

  • Utilizing an anisotropic vortex phase mask.
  • Incorporating a sine function to introduce anisotropy.
  • Modulating the sine function's power and offset angle for directional control.

Main Results:

  • Achieved selective edge enhancement in optical image processing.
  • Demonstrated control over the region and direction of edge emphasis.
  • Successfully introduced anisotropy via a sine function in a vortex mask.

Conclusions:

  • The proposed anisotropic vortex phase mask offers a flexible approach to selective edge enhancement.
  • The sine function provides a tunable mechanism for controlling anisotropy and edge emphasis.
  • This method is effective for amplitude objects requiring targeted feature highlighting.