Rotation and Position Encoder from a Mark of Radial Fringe in Color-RGB by using Phase Shifting
C.H. Arámbula Páez, M.L. Molina Prado, N.A. Hernández
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Base Information
Volume
V51 - N1 / 2018 Ordinario
Reference
49052:1-7
DOI
http://doi.org/10.7149/OPA.51.1.49052
Language
English
Keywords
Fourier Transform, unwrapping, Tracking, Positioning, Phase Shifting.
Abstract
In this work, a method which seeks to locate a radial-color mark attached to the object using the high sensitivity of the phase to determine the position spatial and angular with subpixel resolution due to movement of an object in a 2D scene is presented. The reference pattern is formed by a regular distribution with radially symmetrical of color-RGB fringes. The reconstruction of the absolute phase associated to the fringes allows the location the precise center of the mark and it finds position of the object with sub-pixel resolution. The reconstruction of absolute phase associated with the fringes using the phase shifting technique at three-frame and a development phase algorithm is calculated. A transformation of coordinates and a least squares adjustment is realized giving a function for to extract the center of the reference pattern. Experimental results of measurements of position, displacement and orientation with subpixel resolution is presented, as well as the description of the process for system optimization.
References
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