Vol. 52, Issue 4, pp. 521-533

Vol. 52 Issue 4 pp. 521-533

Simultaneous intensity projection for projector response computation with application to an active radiometric calibration

Pedro-David Filio-Aguilar, Lourdes López-García, Juvenal Rueda-Paz, Manuel Ávila-Aoki


camera-projector compensation, digital fringe projection, phase retrieval, 3D imaging


One of the most important sources of errors in digital fringe projection (DFP) systems is the nonlinearity in the response of the projector when it uses the three-step phase retrieval algorithm. Thus, it is necessary to increase the accuracy without affecting the efficiency. In this sense, the radiometric rectification methods are used. In this paper, an active radiometric rectification method for digital fringe projection is proposed. This proposal consists in two improvements of traditional active techniques: first, parallel intensity projection is used to obtain the projector response which requires only four dot patterns; and second, a method is provided for the calculation of the inverse polynomial that guarantees symmetry with respect to the response of the projector. Experimental results, in a digital fringe projection system, show that the root-mean-square phase error improves 6.3 times using this proposal.

Vol. 52
Issue 4
pp. 521-533

1.5 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology