From Ohm

DVR Shading

How can a volume be shaded?
Problem: We do not have an explicit triangle mesh that could supply normals for shading operations.

Solution: Lighting of the volume by modulation of emission according to the Blinn Phong shading-model: The surface normal is substituted for the normalized gradient vector of the volume. This effectively simulates the shading of iso surfaces without explicitly extracting those.

Head-light with ambient, diffuse, and specular terms of the Blinn-Phong shading model:

images by Christop Rezk-Salama and Peter Hastreiter


Advantage of shading:

Illu-Example1 Illu-Example2

Disadvantage of shading:

Retrieved from http://schorsch.efi.fh-nuernberg.de/roettger/index.php/MedicalVisualization/Lighting

Page last modified on December 09, 2020, at 09:31 AM