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Related Concept Videos

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
Distance Measurements by Taping01:18

Distance Measurements by Taping

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...
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...

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Related Experiment Video

Updated: Jun 22, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

High-resolution, real-time 3D absolute coordinate measurement based on a phase-shifting method.

Song Zhang, Shing-Tung Yau

    Optics Express
    |June 12, 2009
    PubMed
    Summary

    This study introduces a high-resolution, real-time 3D absolute coordinate measurement system. It achieves fast 3D shape acquisition using a phase-shifting method and encoded markers for precise measurements.

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    Last Updated: Jun 22, 2026

    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
    11:34

    High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

    Published on: December 3, 2013

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

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    Published on: February 12, 2014

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    Published on: January 3, 2018

    Area of Science:

    • Metrology
    • Computer Vision
    • Optical Measurement Systems

    Background:

    • Accurate 3D coordinate measurement is crucial for various industrial and scientific applications.
    • Existing systems may lack the speed, resolution, or real-time capabilities required for dynamic scenes.

    Purpose of the Study:

    • To develop and present a high-resolution, real-time 3D absolute coordinate measurement system.
    • To demonstrate the system's capability in capturing dynamic 3D shapes with high fidelity.

    Main Methods:

    • Utilizes a phase-shifting method for 3D shape acquisition.
    • Employs a tiny encoded marker within fringe patterns for absolute coordinate determination.
    • Software detection of markers from texture and gamma maps, combined with calibrated system parameters.

    Main Results:

    • Achieves 3D shape acquisition at 30 frames per second (fps) with 266K points per frame.
    • Successfully measured a moving hand over a 700 mm depth range and human faces with expressions.
    • Demonstrates high-resolution and real-time performance for dynamic 3D measurements.

    Conclusions:

    • The developed system offers a robust solution for high-resolution, real-time 3D absolute coordinate measurement.
    • Its performance is suitable for applications requiring rapid and precise 3D data capture.
    • Potential applications span manufacturing, inspection, entertainment, security, and medical imaging.