Horizon map capture

We present a method for computing horizon maps from captured images of a bu mpy surface. Horizon maps encode surface self-shadowing effects, and can be used with bump or normals maps to realistically render surfaces with small height perturbations. The method does not rely on complete surface reconst ruction, and requires only eight captured images as input. In this paper we discuss how shadow information is extrapolated from the eight captured ima ges to compute the horizon map. Our implementation accounts for the noise a nd uncertainties in physically acquired data.