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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Three-dimensional displacement in multi-colored objects.

C Mares, B Barrientos, R Valdivia

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    |August 10, 2017
    PubMed
    Summary

    This study combines fringe projection (FP) and digital image correlation (DIC) for accurate 3D displacement measurement of multi-colored objects in dynamic events. The novel approach enhances signal contrast for reliable data acquisition.

    Area of Science:

    • Optical Metrology
    • Experimental Mechanics

    Background:

    • Accurate 3D displacement measurement is crucial in dynamic events.
    • Combining optical techniques can improve measurement capabilities.

    Purpose of the Study:

    • To develop a simultaneous measurement method for 3D displacement of multi-colored objects.
    • To enhance measurement accuracy and signal quality using combined Fringe Projection (FP) and Digital Image Correlation (DIC).

    Main Methods:

    • Simultaneous FP and DIC measurements encoded on RGB color image channels.
    • Separated illumination sources and ultraviolet light for enhanced DIC signal contrast.
    • Spectral analysis and contrast evaluation for optimal light source selection.

    Main Results:

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    • Successful simultaneous 3D displacement measurement of multi-colored objects.
    • Enhanced signal contrast and amplitude, enabling measurements in dynamic events.
    • High accuracy displacement measurements achieved even with objects having wide intensity ranges.

    Conclusions:

    • The combined FP-DIC technique offers a robust solution for 3D displacement measurement of multi-colored objects.
    • Optimized illumination and signal encoding are key to achieving high accuracy in dynamic scenarios.
    • This method is suitable for analyzing complex dynamic events involving objects with varying surface properties.