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Related Concept Videos

Distance Measurements by Taping01:18

Distance Measurements by Taping

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Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
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Distance Problem01:29

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When an object's velocity changes over time, the total distance traveled can be determined by summing small displacement intervals over short increments. This approach approximates the true distance through numerical summation and the use of integral calculus. An estimate of the total displacement can be obtained by measuring velocity at regular intervals and multiplying each value by the corresponding time step.If a runner accelerates over the first three seconds of a race, speed measurements...
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Distance Corrections01:15

Distance Corrections

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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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Related Experiment Video

Updated: Feb 28, 2026

Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder
06:54

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Published on: March 4, 2018

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Gait Recognition Based on Normal Distance Maps.

Hazem El-Alfy, Ikuhisa Mitsugami, Yasushi Yagi

    IEEE Transactions on Cybernetics
    |June 11, 2017
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new gait recognition method using distance transforms and contour curvatures. The novel normal distance map significantly improves human identification accuracy at a distance.

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    Area of Science:

    • Computer Vision
    • Biometrics
    • Pattern Recognition

    Background:

    • Gait is a unique human biometric, effective for recognition at distances where other methods fail.
    • Existing gait recognition methods face challenges in robustness and accuracy.

    Purpose of the Study:

    • To develop a novel and robust feature descriptor for gait recognition.
    • To enhance human identification accuracy using gait analysis.

    Main Methods:

    • A new approach combining distance transform with local contour curvatures.
    • Development of the normal distance map as a gait feature template.
    • Evaluation on diverse and large-scale datasets (USF, CASIA-B, OU-ISIR).

    Main Results:

    • The normal distance map encodes body shape and boundary curvature effectively.
    • The proposed method demonstrates superior performance compared to state-of-the-art techniques.
    • Statistically reliable results achieved on the large OU-ISIR gait dataset.

    Conclusions:

    • The normal distance map offers a more robust gait representation.
    • This approach significantly advances the field of gait-based human recognition.
    • The method shows high potential for real-world biometric applications.