Dynamic Resolution in GPU-Accelerated Volume Rendering toAutostereoscopic Multiview Lenticular Displays

摘要

The generation of multiview stereoscopic images of large volume rendered data demands an enormous amount of calculations.We propose a method for hardware accelerated volume rendering of medical data sets to multiview lenticular displays, offeringinteractive manipulation throughout. The method is based on buffering GPU-accelerated direct volume rendered visualizations ofthe individual views from their respective focal spot positions, and composing the output signal for the multiview lenticular screenin a second pass. This compositing phase is facilitated by the fact that the view assignment per subpixel is static, and therefore canbe precomputed. We decoupled the resolution of the individual views from the resolution of the composited signal, and adjust theresolution on-the-fly, depending on the available processing resources, in order to maintain interactive refresh rates. The optimalresolution for the volume rendered views is determined by means of an analysis of the lattice of the output signal for the lenticularscreen in the Fourier domain.