| | | Description |
Because of their geometric complexity, high resolution 3d models, either
designed in high-end modeling packages or acquired with range
scanning devices, cannot be directly used in applications that
require rendering at interactive framerates. one clever method to
overcome this limitation is to perform an "appearance
preserving" geometry simplification, by replacing the original
model with a low resolution mesh equipped with high resolution
normal maps. this process preserves small scale visual features
from the initial geometry, while only requiring a reduced set of
polygons. however, this conversion usually relies on some kind of
global or piecewise parameterization, combined with the generation
of a texture atlas, a process which is computationally expensive
and requires accurate user supervision. in this paper, we propose
an alternative method in which the normal field of a high
resolution model is adaptively sampled and encoded in an
octree-based data structure, that we call "appearance
preserving octree-texture" (apo). our main contributions are:
a normal-driven octree generation, a compact encoding and a
fast look-up algorithm. our method is efficient,
totally automatic and avoids the expensive creation of a
parameterization with its corresponding texture atlas.
project page:
| | Tags : APO, Appearance, Preserving, Octree, Textures, normal, mapping |
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