Author:
Salman Shahidi
Affiliation:
CNRS, France
Keyword(s):
Natural Phenomena, Weathering Phenomena, 3D Texture Synthesis, Displacement Mapping.
Related
Ontology
Subjects/Areas/Topics:
Computer Vision, Visualization and Computer Graphics
;
Geometry and Modeling
;
Modeling of Natural Scenes and Phenomena
;
Physics-Based Modeling
;
Scene and Object Modeling
;
Texture Models, Analysis, and Synthesis
Abstract:
Human made buildings and constructions are very dependent upon various weathering phenomena, resulting in complex appearances and patterns that vary with time and environment. Handling such complexity is important in computer graphics in order to improve the realism of images. This difficult work is usually done by hand by designers and can lead to non-plausible results. Another way to tackle this problem is to provide new aging algorithms. Among a large number of weathering, salt weathering results in important visual changes affecting widely used materials: bricks and mortars. In this paper, we present a method to generate the texture of deformed and eroded masonry face by efflorescence. To avoid complex and unintuitive formulations while keeping plausible results, we chose a physically-inspired model. Moreover, in order to keep an important artistic control, it is possible for the user to create weathered textures in preferential masonry zones, leading to a great variety of differ
ent patterns. First, we synthesize a masonry (brick/mortar) solid texture. Next, we add the effects of efflorescence and sub-florescence using a specific algorithm accounting for regular crystallized or eroded surface masonry by displacement mapping. In addition, to model very strong weathering effects on building walls, we apply a simple geometry modification method to modify the surface before its rendering.
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