Two new 3D scanning setups for the fast acquisition of sequences of moving persons based on nearinfrared structured light projection are introduced. Both systems consist of a pair of stereo cameras and a projection unit and are working in the near-infrared range (illumination wavelength is over 780 nm) which is absolutely irritation-free for the observed person. The first system is based on the socalled GOBO projector and the second system uses a multi-aperture-projection unit consisting of ten projecting components. Measurements of 3D sequences of moving persons and examples of changing facial expressions are given in order to show the power of the setups. The results obtained by the use of the different projection systems are compared concerning measurement accuracy and robustness.

Complex optical free-form surfaces are very common optical components for the use in modern illumination and lighting systems. In this paper we describe the use of high accurate fringe projection for the measurement of optical free-form surfaces with a resolution in the sub-µm-range. To achieve the required high accuracy the method of uniform measurement scale in fringe projection, proposed by the authors some years ago, is used 1. The basic idea is the exclusive use of phase values for the 3D-data calculation. Because of that, the accuracy of such a measurement set-up is mainly restricted by the lens distortion of the projection system. In order to compensate this we introduce a new method for a 3D-correction of the distortion of the projection lens taking into account spatial dependent distortion parameters. The distortion of the projection lens is determined by a measurement of reference planes which will be used to calculate a 3D-correction matrix. This matrix covers the whole measurement volume (lateral and vertical) and contains the determined distortion of the projection system. As a result the accuracy of the correction improved the absolute accuracy by a factor of four. Furthermore, the data quality is enhanced by a further factor of two using a wavelet filtering for noise reduction. The realized measurement set-up has a measurement field of up to 180 mm in diameter. It will be shown that the measurement of optical free form surfaces with medium range accuracy will be possible where we have reached a limit of 0.5 µm RMS error in a measuring field of 70 mm diameter

A device for music generation through movement is introduced which may be a new tool for therapies especially of persons with disabilities. The system connects fast 3D capturing of acting person(s) with high-resolution 2D images and specialized sound/music modules, which translate the detected movements into sound and musical phrases. In this paper, the main challenges and solutions of the project are presented. Experiments and applications with different groups of patients are described and evaluated.