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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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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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Camera calibration by multiplexed phase encoding of coordinate information.

Rigoberto Juarez-Salazar, Fermin Guerrero-Sanchez, Carlos Robledo-Sanchez

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    This study introduces a simple camera calibration method using phase encoding and coordinate transformation. The technique robustly estimates camera parameters without iteration, showing feasibility in simulations and experiments.

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    Area of Science:

    • Computer Vision
    • Optical Metrology

    Background:

    • Camera calibration is crucial for 3D reconstruction.
    • Existing methods can be complex or iterative.

    Purpose of the Study:

    • To propose a simple, noniterative camera calibration method.
    • To enable robust estimation of intrinsic and extrinsic camera parameters.

    Main Methods:

    • Phase encoding of a reference coordinate frame.
    • Coordinate transformation analysis of imaging.
    • Least-squares estimation for parameter retrieval.

    Main Results:

    • A feasible phase demodulation system was developed.
    • Robust and noniterative estimation of camera parameters achieved.
    • Simulations and experiments validated the method's effectiveness.

    Conclusions:

    • The proposed method offers a simple and effective camera calibration solution.
    • Potential application in calibrating fringe-projection systems and projectors.