Demonstration of virtual exhibition of a 3D digitized museum item.
Several photographs are taking in-site in a few minutes under variable lighting conditions.
Basic geometry is captured by Structure from Motion (SfM) and photogrammetric reconstruction methods for fine field camera calibration.
Fine details and surface Bidirectional Scattering Distribution Function (BSDF) maps are approximated by photometric stereo methods based on estimations of environmental light casted over the item.
The final images are produced in High Dynamic Range (HDR) from the surface+geometry model using an open source path tracing physically based render engine (Blender Cycles).
The first seconds of the video shows the original lighting conditions (while in a different environment). The last portion illustrates an additional moving light for closer inspection of fine relief details.
Antonio Martos - Advision 2013
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