A structured light approach for 3d surface reconstruction with a stereo line-scan system

In this paper we present a novel technique for optical 3d surface reconstruction using line scan cameras in combination with structured light. The approach generating structured light is customized to the special demands of line-scan image capturing. Due to the distributed generation of light and the absence of shading elements we obtain a light intensity that is comparable with conventional line lights. Thus we achieve short integration times, which is a necessary condition in most line-scan applications. Furthermore, with our our approach we can generate different pattern sequences, which allows us to implement coded light methods such as time correlation or phase shifting. The light patterns can be switched synchronously with the captured lines of the camera so that a single scanning of a surface is sufficient to calculate a high quality 3d reconstruction.