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Hand-guided qualitative deflectometry with a mobile device.

Florian Willomitzer, Chia-Kai Yeh, Vikas Gupta

    Optics Express
    |April 1, 2020
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a novel mobile 3D surface measurement system using a phone's screen and camera. It captures detailed surface data for objects with complex shapes and wide fields of view without calibration.

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    Area of Science:

    • Computer Vision
    • Optical Metrology
    • Mobile Sensing

    Background:

    • Traditional 3D surface measurement techniques often require specialized equipment and controlled environments.
    • Existing mobile deflectometry systems have limitations in capturing surfaces with significant normal variations and wide fields of view (FoV).

    Purpose of the Study:

    • To develop an accessible mobile system for 3D surface measurements using a smartphone.
    • To overcome the limitations of current mobile deflectometry systems regarding surface complexity and FoV.
    • To enable 'in the wild' 3D surface measurements of specular objects.

    Main Methods:

    • Exploits the mobile device's screen and front-facing camera for 3D deflectometry.
    • Employs automated multi-view panoramic stitching algorithms for normal map generation.
    • Utilizes a hand-guided capture process, eliminating the need for external tracking systems.

    Main Results:

    • Successfully captures 3D surface data for surfaces with large normal variations and wide FoV.
    • Achieves high-quality 3D surface measurements without requiring a prior calibration procedure.
    • Demonstrates the system's capability for 'in the wild' measurements of specular objects.

    Conclusions:

    • The developed system offers an accessible and effective solution for 3D surface measurements using mobile devices.
    • The method broadens the applicability of deflectometry to complex surfaces and wide FoV scenarios.
    • Potential applications include computer vision tasks like object detection and recognition.