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Related Concept Videos

Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
State Space Representation01:27

State Space Representation

The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force per...

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Related Experiment Video

Updated: Jun 8, 2026

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

Hybrid implementation of a real-time Radon-space image-processing system.

S Woolven, V M Ristic, P Chevrette

    Applied Optics
    |September 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel hybrid optical-digital system analyzes images in Radon space using the forward Radon transform. This system achieves real-time detection of temperature difference targets, outperforming human observers.

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    Area of Science:

    • Image Processing
    • Optical Computing
    • Computational Imaging

    Background:

    • Traditional image processing often requires significant computational resources and time.
    • Tomographic transforms, like the Radon transform, offer alternative data representations for analysis.
    • Real-time analysis capabilities are crucial for many advanced imaging applications.

    Purpose of the Study:

    • To introduce a hybrid optical-digital system for real-time image analysis.
    • To demonstrate the system's capability for analysis in Radon space.
    • To evaluate the system's performance in detecting minimum-resolvable-temperature-difference targets.

    Main Methods:

    • A hybrid system combining an optical processor and a digital subsystem.
    • Utilizes the forward Radon transform to convert 2D image data to 1D Radon space.
    • Optical front-end performs data conversion; digital subsystem processes 1D projections.

    Main Results:

    • The system achieves real-time processing rates.
    • Demonstrated superior performance over human observers in detecting temperature difference targets.
    • The optical front-end performs 6.04 × 10^10 operations/s.

    Conclusions:

    • The hybrid optical-digital system enables efficient real-time image analysis in Radon space.
    • Radon space analysis offers advantages in data reduction and computational efficiency for object moments.
    • The system shows significant potential for advanced real-time measurement and analysis tasks.