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

Infrared (IR) Spectroscopy: Overview

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...

Imaging Biological Samples with Optical Microscopy

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

IR Spectrometers

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

IR Spectrum

IR Spectrum

When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0% (complete...

IR Spectrum Peak Intensity: Amount of IR-Active Bonds

IR Spectrum Peak Intensity: Amount of IR-Active Bonds

When infrared radiation is passed through a molecule, absorption occurs if the molecule's vibration leads to a substantial change in its bond dipole moment. Transitions between vibrational energy levels, typically corresponding to infrared frequencies (4000–400 cm−1), allow absorption if the vibration significantly alters the dipole moment, making the molecule infrared active. The molecular bonds have different stretching and bending vibrations, resulting in various peaks with varying...

You might also read

Related Articles

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

Sort by

Same author

Retrospective application of the HEAR score on patients evacuated for chest pain: Assessing the utility of point-of-care troponin.

Canadian journal of rural medicine : the official journal of the Society of Rural Physicians of Canada = Journal canadien de la medecine rurale : le journal officiel de la Societe de medecine rurale du Canada·2022

Same author

PTSD in women is associated with a block in conversion of progesterone to the GABAergic neurosteroids allopregnanolone and pregnanolone measured in plasma.

Psychoneuroendocrinology·2018

Same author

Faecal avoidance and the risk of infection by nematodes in a natural population of reindeer.

Oecologia·2017

Same author

Safe extubation in recovery rooms.

Anaesthesia·2015

Same author

Family medicine/northern medical services involvement in northern Saskatchewan.

Canadian family physician Medecin de famille canadien·2011

Same author

A comparison of risk factors associated with community-associated methicillin-resistant and -susceptible Staphylococcus aureus infections in remote communities.

Epidemiology and infection·2010

Search research articles

Related Experiment Video

Updated: Jul 6, 2026

The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants

The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants

Published on: May 8, 2015

General image-quality equation for infrared imagery.

J C Leachtenauer¹, W Malila, J Irvine

¹J/M Leachtenauer Associates, Incorporated, 4208 Wakefield Drive, Annandale, Virginia 22003, USA. jcleachtr@aol.com

|March 20, 2008

Summary

This summary is machine-generated.

The General Image Quality Equation (GIQE) was adapted for infrared imagery. This model predicts image interpretability based on scale, sharpness, and signal-to-noise ratio.

More Related Videos

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

Related Experiment Videos

Last Updated: Jul 6, 2026

The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants

The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants

Published on: May 8, 2015

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

Area of Science:

Remote Sensing
Image Analysis
Optical Engineering

Background:

The General Image Quality Equation (GIQE) is a validated model for assessing visible imagery quality.
Evaluating infrared (IR) imagery quality requires a similar quantitative approach.

Purpose of the Study:

To extend the regression-based GIQE model to infrared imagery.
To establish a predictive model for IR image interpretability.

Main Methods:

Adapted the existing GIQE framework for IR data.
Utilized scale, sharpness, and signal-to-noise ratio as input parameters.
Maintained the mathematical form of the visible GIQE.

Main Results:

The extended GIQE successfully predicts IR National Imagery Interpretability Rating Scale (NIIRS) values.
The model demonstrates that scale, sharpness, and signal-to-noise ratio are key predictors for IR image quality.
The functional form of the equation is consistent between visible and IR domains.

Conclusions:

The GIQE model is adaptable and effective for assessing infrared image quality.
This extension provides a valuable tool for quantitative analysis of IR imagery.
The findings support the use of GIQE for consistent image quality assessment across different spectral bands.