Optics and Lasers in Engineering
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.
Chang, M., Lin, P. P., , & Tai, W. C. (1994). A fringe center detection technique based on a sub-pixel resolution, and its applications using sinusoidal gratings. Optics and Lasers in Engineering, 20(3), 163-176. doi:10.1016/S0143-8166(94)90011-6
NOTICE: this is the author’s version of a work that was accepted for publication in Optics and Lasers in Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Optics and Lasers in Engineering, 20, 3, (01-01-1994); 10.1016/S0143-8166(94)90011-6