Dense depth maps by active color illumination and image pyramids

Only few problems in computer vision have been investigated more vigorously than stereo vision. The key problem in stereo is how to find the corresponding points in the left and in the right image, referred to as the correspondence problem. Whenever the corresponding points are determined, the depth can be computed by triangulation. Although, more than 300 papers have been published dealing with stereo vision this technique still suffers from a lack in accuracy and/or long computation time needed to match stereo images. Therefore, there is still a need for more precise and faster algorithms.