Experimental Mechanics

, Volume 30, Issue 1, pp 10–16

Three-dimensional displacement measurements using digital image correlation and photogrammic analysis

  • Z. L. Kahn-Jetter
  • T. C. Chu

DOI: 10.1007/BF02322695

Cite this article as:
Kahn-Jetter, Z.L. & Chu, T.C. Experimental Mechanics (1990) 30: 10. doi:10.1007/BF02322695


The application of digital image correlation and stereoscopic principles is used to determine three-dimensional displacements. Two pairs of stereo images of a speckled surface before and after deformation are digitized and correlated to determine the three-dimensional displacements. The images are interpolated so as to account for subpixel displacements. A sequential decision technique and a coarsefine search are employed to increase computer efficiency and decrease run time. Very accurate results are obtained, expecially when the magnification is increased. The effect of camera tilt is shown to be negligible. Theory and experimental verification are presented.

Copyright information

© Society for Experimental Mechanics, Inc. 1990

Authors and Affiliations

  • Z. L. Kahn-Jetter
    • 1
  • T. C. Chu
    • 2
  1. 1.Mechanical Engineering DepartmentManhattan CollegeRiverdale
  2. 2.Department of Mechanical and Industrial EngineeringPolytechnic UniversityBrooklyn