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Related Concept Videos

Calibration Curves: Linear Least Squares01:20

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A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Updated: Jul 31, 2025

Determining 3D Flow Fields via Multi-camera Light Field Imaging
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Flexible structured light system calibration method with all digital features.

Song Zhang

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    Summary
    This summary is machine-generated.

    This study introduces a novel structured light system calibration that uses digital patterns and a mirror, eliminating physical targets. This flexible and simple method achieves accurate calibration for single-camera and single-projector systems.

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    Area of Science:

    • Computer Vision
    • Metrology
    • Optical Engineering

    Background:

    • Structured light systems are crucial for 3D reconstruction and measurement.
    • Traditional calibration methods often rely on physical targets, limiting flexibility and increasing complexity.
    • Accurate calibration is essential for the precision of structured light systems.

    Purpose of the Study:

    • To develop a novel, targetless calibration method for single-camera and single-projector structured light systems.
    • To enhance the flexibility and simplicity of structured light system calibration.
    • To achieve accurate intrinsic and extrinsic parameter estimation without physical calibration objects.

    Main Methods:

    • Utilizes a digital display (e.g., LCD) for camera intrinsic calibration with digital patterns.
    • Employs a flat surface (e.g., mirror) for projector intrinsic and extrinsic calibration.
    • Requires a secondary camera to facilitate the entire calibration process.

    Main Results:

    • Successfully demonstrated a calibration method that eliminates the need for physical calibration targets.
    • Achieved accurate camera intrinsic calibration using digital patterns on an LCD screen.
    • Validated accurate projector intrinsic and extrinsic calibration using a mirror surface.
    • Experimental results confirmed the method's effectiveness and accuracy.

    Conclusions:

    • The proposed targetless calibration method offers a more flexible and simpler approach to structured light system calibration.
    • This innovation reduces reliance on specialized physical targets, making calibration more accessible.
    • The method provides a viable and accurate solution for calibrating single-camera, single-projector structured light systems.