On the Advancement of BTF Measurement on Site
On the Advancement of BTF Measurement on Site
We present our progress to the on-site measurement of the spatially varying surface reflectance represented by bidirectional texture function (BTF). This requires a physical realization of a portable instrument that can be brought to the sample, outside the laboratory. We discuss our motivation, the main issues, and challenges for making such an instrument possible. We focus on the design of the mechanical parts that are required for an easy manipulation of the device on site and describe our experiences with the instrument in practice. The design uses a miniaturized rotary light stage. It allows for measurement of HDR images with the acquisition rate of 1000 HDR images per minute, where one HDR image consists of 4 individual exposures.
Categories and Subject Descriptors (according to ACM CCS): I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism-Color, shading, shadowing, and texture I.4.1 [Image Processing and Computer Vision]: Digitization and Image Capture-Reflectance
Vlastimil Havran, Jan Hosek, Sarka Nemcova, and Jiri Cap
Workshop on Material Appearance Modeling
Measurement and Fluorescence
5
9
- Czech Technical University in Prague Czech Republic
- Czech Technical University in Prague, Faculty of Civil Engineering Czech Republic
- Czech Technical University in Prague - Faculty of Electrical Engineering Czech Republic
and texture, I.4.1 [Image Processing and Computer Vision], Color, Digitization and Image Capture, I.3.7 [Computer Graphics], shadowing, Three Dimensional Graphics and Realism, Reflectance, shading
and texture, I.4.1 [Image Processing and Computer Vision], Color, Digitization and Image Capture, I.3.7 [Computer Graphics], shadowing, Three Dimensional Graphics and Realism, Reflectance, shading
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