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Related Concept Videos

Stereoisomers02:32

Stereoisomers

On the basis of mirror symmetry, stereoisomers of an organic molecule can be further classified into diastereomers and enantiomers. Diastereomers are stereoisomers that are not mirror images of each other. Substituted alkenes, such as the cis and trans isomers of 2-butene, are diastereomers, as these molecules exhibit different spatial orientations of their constituent atoms, are not mirror images of each other, and do not interconvert. Here, the interconversion is suppressed due to restricted...
Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Doppler Effect - II01:05

Doppler Effect - II

The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
Doppler Effect - I00:56

Doppler Effect - I

The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...

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Stereoacuity Improvement using Random-Dot Video Games
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Dynamic Refraction Stereo.

Nigel J W Morris, Kiriakos N Kutulakos

    IEEE Transactions on Pattern Analysis and Machine Intelligence
    |February 2, 2011
    PubMed
    Summary
    This summary is machine-generated.

    This study reconstructs 3D liquid surfaces using two camera views. The novel refractive disparity method accurately captures dynamic liquid behavior without knowing the refractive index.

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    Area of Science:

    • Computer Vision
    • Optics
    • Fluid Dynamics

    Background:

    • Reconstructing 3D surfaces is crucial for understanding physical phenomena.
    • Accurate surface normal and position estimation is challenging for dynamic, refractive interfaces like liquids.

    Purpose of the Study:

    • To develop a method for reconstructing the 3D position and surface normal of arbitrary refractive surfaces.
    • To apply this method for detailed, dynamic reconstruction of liquid surfaces.

    Main Methods:

    • Utilizing two viewpoints to solve for surface properties.
    • Introducing a novel "refractive disparity" stereo matching criterion.
    • Employing an optimization-based algorithm for point-wise reconstruction.

    Main Results:

    • Demonstrating that two viewpoints are sufficient for general refractive surface reconstruction, even with unknown refractive index.
    • Successfully reconstructing complex, deforming liquid surfaces.
    • Achieving detailed reconstructions that capture dynamic liquid behavior.

    Conclusions:

    • The proposed method enables accurate 3D reconstruction of dynamic liquid surfaces.
    • The refractive disparity metric is effective for refractive scenes.
    • This technique offers a robust solution for analyzing fluid dynamics and free-surface flows.