title: Measurement of transient deformation by color encoding.
abstract: We present a method based on color encoding for measurement of transient 3D deformation in diffuse objects. The object is illuminated by structured light that consists of a fringe pattern with cyan fringes embedded in a white background. Color images are registered and information on each color channel is then separated. Surface features appear on the blue channel while fringes on the red channel. The in-plane components of displacement are calculated via digital correlation of the texture images. Likewise, the resulting fringes serve for the measuring of the out-of-plane component. As crossing of information between signals is avoided, the accuracy of the method is high. This is confirmed by a series of displacement measurements of an aluminum plate.
authors.affiliation: Centro de Investigaciones en Óptica A. C., Loma del Bosque 115, León, Gto. Mexico.
authors.forename: C
authors.initials: C
authors.lastname: Mares
authors.forename: B
authors.initials: B
authors.lastname: Barrientos
authors.forename: A
authors.initials: A
authors.lastname: Blanco
mesh_terms: D000465:Algorithms; D000535:Aluminum / Q000032:analysis / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods*; D055119:Elastic Modulus; D006245:Hardness Tests / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008422:Materials Testing / Q000379:methods*; D012031:Refractometry / Q000379:methods*
chemical_list: D000535:Aluminum