Accurate and Simple Calibration of DLP Projector Systems

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Abstract

Much work has been devoted to the calibration of optical cameras, and accurate and simple methods are now available which require only a small number of calibration targets. The problem of obtaining these parameters for light projectors has not been studied as extensively and most current methods require a camera and involve feature extraction from a known projected pattern. In this work we present a novel calibration technique for DLP Projector systems based on phase shifting profilometry projection onto a printed calibration target. In contrast to most current methods, the one presented here does not rely on an initial camera calibration, and so does not carry over the error into projector calibration. A radial interpolation scheme is used to convert features coordinates into projector space, thereby allowing for a very accurate procedure. This allows for highly accurate determination of parameters including lens distortion. Our implementation acquires printed planar calibration scenes in less than 1s. This makes our method both fast and convenient. We evaluate our method in terms of reprojection errors and structured light image reconstruction quality.
Original languageEnglish
Article number897909
JournalProceedings of SPIE, the International Society for Optical Engineering
Volume8979
Number of pages9
ISSN0277-786X
DOIs
Publication statusPublished - 2014
EventSPIE Photonics West : Emerging Digital Micromirror Device Based Systems and Applications VI - San Francisco, California, United States
Duration: 1 Feb 20146 Feb 2014

Conference

ConferenceSPIE Photonics West : Emerging Digital Micromirror Device Based Systems and Applications VI
CountryUnited States
CitySan Francisco, California
Period01/02/201406/02/2014

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