Tomographic Reconstruction and Efficient Rendering of Refractive Gas Flows

摘要: This chapter introduces techniques for the capture and efficient display of dynamic three-dimensional non-stationary gas flows. We describe a flexible Schlieren-tomographic system consisting multiple consumer camcorders. A special choice background pattern Background Oriented Schlieren (BOS) imaging provides flexibility in experimental setup. Optical flow are used to measure image space deflections due heated air flows from arbitrary camera positions. specially tailored sparse-view algebraic reconstruction algorithm is employed tomographically recover refractive index gradient field. After robust integration these fields, time-varying, fully fields obtained. These can be rendered efficiently using ray-casting style that suitable graphics hardware acceleration. Additional optical properties within same computational framework.