Abstract
Three-dimensional shape measurements by sinusoidal fringe projection using phase-shifting interferometry algorithms are distorted by the nonlinear response in intensity of commercial video projectors and digital cameras. To solve the problem, we present a method that consists in projecting and acquiring a temporal sequence of strictly binary patterns, whose (adequately weighted) average leads to a sinusoidal fringe pattern with the required number of bits. Since binary patterns consist of “ones” and “zeros”—and no half-tones are involved—the nonlinear response of the projector and the camera will not play a role, and a nearly unit contrast gray-level sinusoidal fringe pattern is obtained. Validation experiments are presented.
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
Jorge L. Flores, García Torales, José A. Ferrari, Gastón Ayubi, Oscar Ed. Castillo, and Matías Di Martino
Appl. Opt. 52(15) 3576-3582 (2013)
Gastón A. Ayubi, J. Matías Di Martino, Julia R. Alonso, Ariel Fernández, Jorge L. Flores, and José A. Ferrari
Opt. Lett. 37(8) 1325-1327 (2012)
Jorge L. Flores, José A. Ferrari, G. García Torales, Ricardo Legarda-Saenz, and Adriana Silva
Appl. Opt. 54(30) 8827-8834 (2015)