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Related Concept Videos

Stereoisomers02:32

Stereoisomers

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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...
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Stereoisomerism02:52

Stereoisomerism

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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...
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Types of Global Positioning System Surveys01:30

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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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Distance Corrections01:15

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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
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Updated: Oct 12, 2025

Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery
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Collaborative semi-global stereo matching.

Penghui Bu, Hong Zhao, Jiaxing Yan

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    This summary is machine-generated.

    This study introduces a local edge-aware filtering method to semi-global matching (SGM) to eliminate streak artifacts in disparity images. The enhanced SGM improves stereo matching accuracy and efficiency without significant computational overhead.

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    Area of Science:

    • Computer Vision
    • Artificial Intelligence

    Background:

    • Semi-global matching (SGM) is efficient and accurate but produces streak artifacts due to limited scanline interaction.
    • These artifacts degrade the quality of disparity images in stereo vision applications.

    Purpose of the Study:

    • To develop a novel method to enhance SGM by improving scanline interaction.
    • To eliminate streak artifacts and improve disparity image quality.

    Main Methods:

    • Introduced a local edge-aware filtering method integrated into SGM.
    • Utilized bilateral weights based on intensity similarity and spatial affinity for inter-scanline connections.
    • Employed recursive estimation of aggregated costs and weighted averaging in orthogonal directions.

    Main Results:

    • Successfully removed all streak artifacts from disparity images.
    • Demonstrated significant improvement in disparity image quality.
    • Achieved superior performance compared to other non-local cost aggregation methods.

    Conclusions:

    • The proposed local edge-aware filtering method effectively enhances SGM by addressing scanline interaction limitations.
    • This approach offers a computationally efficient solution for improving stereo matching accuracy and artifact removal.