Influence of projector pixel shape on ultrahigh-resolution 3D shape measurement

Jae Sang Hyun, Song Zhang

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The state-of-art three-dimensional (3D) shape measurement with digital fringe projection (DFP) techniques assume that the influence of projector pixel shape is negligible. However, our research reveals that when the camera pixel size is much smaller than the projector pixel size in object space (e.g., 1/5), the shape of projector pixel can play a critical role on ultimate measurement quality. This paper evaluates the performance of two shapes 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 for ultrahigh resolution 3D shape measurement system to use a projector with rectangular-shaped pixels than a projector with diamond-shaped pixels.

Original languageEnglish
Pages (from-to)9510-9520
Number of pages11
JournalOptics Express
Issue number7
Publication statusPublished - 2020 Mar 30

Bibliographical note

Funding Information:
This study was sponsored by the National Science Foundation (NSF) under grant numbers IIS-1637961 and IIS-1763689. The views expressed in this paper are those of the authors and not necessarily those of the NSF.

Publisher Copyright:
© 2020 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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