2 results
Search Results
Now showing 1 - 2 of 2
Item GPU Based On-the-fly Light Emission-absorption Approximation for Direct Multi-volume Rendering(The Eurographics Association, 2011) Khlebnikov, Rostislav; Kainz, Bernhard; Roth, Bernhard; Muehl, Judith; Schmalstieg, Dieter; R. Laramee and I. S. LimWe present a novel on-the-fly scatter approximation scheme that can be applied concurrently to multiple volumetric datasets. We use a simplified version of the emission-absorption model, including single scattering and shadowing and guide the scatter sample positions and in-scatter coefficients by local gradients. This allows us to render multiple intersecting volumes with our rendering system with clearly visible improvements in rendering quality over local illumination models, while maintaining interactive frame-rates.Item Synthesizing Relative Radiance for Realistic Rendering of Virtual Objects in 3D Photo Collections(The Eurographics Association, 2011) Kölzer, K.; Nagl, F.; Grimm, P.; A. Day and R. Mantiuk and E. Reinhard and R. ScopignoWe present a novel approach for accurate reconstruction of relative radiance of every surface in an augmented image-based 3D scene. By using unordered images with varying exposure of 3D Photo Collections and a 3D mesh of the scene geometry, the relative radiance of all surfaces in the scene is reconstructed with High Dynamic Range. This is performed by subdividing the surfaces of the scene into patches and calculating the HDR image estimate for each patch. The result is used to embed virtual objects into 3D Photo Collections with authentic lighting.