No abstract

No abstract

This research proposes a simplified geometric model for a generic projector application in digital fringe profilometry. Reported works have high number of model parameters and project at slanted angles. This increases complexity of the calibration processes and causes . The arrangement also complicates the determination of model parameters as the inner details of a projector are not revealed to end user. The proposed model enables simpler calibration by determining only three parameters, eliminating inconsistency of fringe width, and applying a more suitable light path configuration for any generic projector available off-the-shelf. Three conditions must be met for the model to function appropriately, which includes (1) the camera optical axis and projector reference line must be orthogonal to the reference plane, (2) the measured object must be within the overlapped light path area between the camera and projector, and (3) the end of the image acquisition area must be placed before the reference line of the projector. Experimental result shows that the model is capable of reconstructing object with errors recorded at 0.07 ± 0.04 mm, 0.10 ± 0.04 mm and 2.63 ± 0.20 mm for flat, slanted and curved surfaces, respectively.

No abstract