Abstract
The state-of-art three-dimensional (3D) shape measurement techniques based on digital fringe projection (DFP) techniques assume that the influence of the shape of projector pixel shape is negligible. However, our research reveals that when the camera pixel size is much smaller (e.g., 1/10 or less) than the projector pixel size in object space, the shape of the projector pixel significantly can impact ultimate measurement quality even when binary defocusing technique is employed. This paper evaluates the performance of two different types of projector pixels: rectangular and diamond shaped. Both simulation and experimental results demonstrated that when, the camera pixel size is significantly smaller than the projector pixel size, it is advantageous to use a projector with rectangular pixels than the projector with a diamond shaped pixels.
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