Natural materials often exhibit complex reflectance and intricate geometry posing a real challenge in surface modeling. We investigate this problem in our volumetric surface reconstruction and modeling project. In the process, we have compiled a database of several complex volumetric surface textures. We have decided to make this valuable resource available to other researchers interested in the topic.
The database contains a number of textures observed for varying view and illumination directions. It was created at the Beckman Institute at the University of Illinois at Urbana-Champaign. The acquisition setup shown on a diagram below used a stationary Canon XL1 camcorder and a white OTLWHTA-5-10-66-E light-emitting diode controlled with an AdeptOne-MV robot. A texture sample was mounted on a custom-designed robotic pan-tilt table mount:
All textures were sampled over a hemisphere every 15° for the light and every 20° for the view in both the elevation and the rotation angle. This resulted in a total of over 10,000 sample images for each texture. All textures were captured at 100DPI for their frontal views.
Texture data sets can be post-processed into a standard sampled Bidirectional Texture Function (BTF) representation. Below are a few BTF samples of a processed 'carpet' texture data set showing the effects of changing the elevation of the light and the view directions:
Light direction elevation:
15°
30°
45°
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60°
75°
View direction elevation:
0°
20°
40°
60°
80°
We are also providing a few texture sets with dense 2° sampling of the light direction. These were done only for the frontal view direction. The current availability status of each texture is indicated in the table below:
Texture:
Name:
Raw data availability (view and lighting):
BTF representation availability:
Dense 2° data availability (lighting only):
Carpet
Yes
Yes
No
Fur
Yes
No
No
Gravel
Yes
No
Yes
Lego
Yes
No
No
Lichen
Yes
No
No
Moss
Yes
Yes
No
Moss2
No
No
Yes
Spanish Moss
Yes
No
No
Sponge
Yes
Yes
Yes
Velvet
Yes
Yes
No
People
Publications
- M. L. Koudelka, S. Magda, P. N. Belhumeur, D. J. Kriegman
Acquisition, Compression and Synthesis of Bidirectional Texture Functions [pdf]
3rd International Workshop on Texture Analysis and Synthesis (Texture 2003).
Downloads
- Due to the high volume of the data, we must handle all requests individually. Access requests should be directed to Sebastian Magda (magda@uiuc.edu). Once granted, the database will be accessible here.