A Fringe Center Detection Technique Based on a Sub-Pixel Resolution, and Its Applications Using Sinusoidal Gratings

Ming Chang, Paul P. Lin, Wen Chih Tai

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    Abstract

    A common problem in optical profilometry is the accuracy in locating fringe centers. This paper presents an accurate fringe center detection technique based on sub - pixel resolution using the fringe projection method. An optimum reconstruction filter is developed which has low sensitivity to noise. In fringe center detection , computer simulation results of using one- pixel and sub - pixel resolutions are compared. The detection technique is then applied to radius measurement of cylindrical objects and surface profile measurement of diffuse objects. The experimental results thus obtained through the proposed optimum reconstruction filter show significant improvement in measurement accuracy.

    Original languageAmerican English
    JournalOptics and Lasers in Engineering
    Volume20
    DOIs
    StatePublished - Jan 1 1994

    Disciplines

    • Computer-Aided Engineering and Design
    • Optics

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