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Related Concept Videos

Group Polarization01:01

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Polar Coordinates01:24

Polar Coordinates

The polar coordinate system offers an alternative to the Cartesian coordinate system for specifying points in a plane, using a distance and an angle instead of x and y coordinates. This system is particularly advantageous in situations involving circular or rotational symmetry, such as in physics or engineering problems involving waves, oscillations, or orbital paths.Defining Polar CoordinatesIn polar coordinates, a point is represented as P(r, ��), where r is the radial distance from a fixed...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
Cell Polarization by Rho Proteins01:21

Cell Polarization by Rho Proteins

Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
Graphs of Polar Equations01:17

Graphs of Polar Equations

The polar coordinate system represents points using a distance from a central point (the pole) and an angle from a reference direction (the polar axis). Unlike rectangular coordinates, polar coordinates are ideal for graphing curves with radial symmetry or periodic behavior.Some general forms of graphs in polar coordinates include the following:Equation of a Circle (Centered at the Pole):A graph where the radius remains constant for all angles traces a circle centered at the pole:Equation of a...

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Related Experiment Video

Updated: May 26, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

Cross-polarisation, making it practical.

Nathan Edwards1

  • 1Dental Illustration Unit, School of Dentistry, Cardiff University, Cardiff, UK. wmlnde@cardiff.ac.uk

Journal of Visual Communication in Medicine
|January 11, 2012
PubMed
Summary
This summary is machine-generated.

Cross-polarisation photography effectively removes specular highlights from images. This technique is practical for medical, scientific, and forensic applications when using appropriate camera equipment.

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Last Updated: May 26, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Hyperpolarized Xenon for NMR and MRI Applications
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Hyperpolarized Xenon for NMR and MRI Applications

Published on: September 6, 2012

Area of Science:

  • Optics
  • Medical Imaging
  • Forensic Photography

Background:

  • Specular highlights in intra-oral photographs hinder clinical assessment.
  • Clinicians require methods to improve image quality for diagnosis and documentation.

Purpose of the Study:

  • To evaluate the practicality of cross-polarisation for routine clinical photography.
  • To assess camera and light source configurations for optimal image capture.
  • To define calibration and signal-to-noise ratio parameters for cross-polarisation.

Main Methods:

  • Evaluation of camera and light source devices for cross-polarisation image capture.
  • Development of camera white balance calibration procedures.
  • Series of tests to determine signal-to-noise ratio influence points.

Main Results:

  • Cross-polarisation is a viable technique for reducing specular reflections.
  • Camera anti-aliasing filters significantly impact image quality.
  • Optimal equipment selection and calibration are crucial for effectiveness.

Conclusions:

  • Cross-polarisation is a practical and effective technique for various scientific fields.
  • The method offers significant improvements in image quality for medical, scientific, and forensic applications.
  • Appropriate equipment selection is key to successful implementation.