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Bidirectional reflectance distribution functions (BRDF) in the near-infrared (NIR) are important to compare Time-of-Flight simulation methods with real-world data quantitatively. For that purpose we have measured some isotropic NIR BRDFs for specified materials and provide them to the research community for further research.
For the measurement we have used a gonioreflectometer setup including a NIR laser that operates at 850 nm and a photo diode detector. The following angle ranges have been used (in deg):
- alpha = 0,..., 90,
- beta = alpha - 90, ..., alpha + 90,
- gamma = 0, ..., 90.
Descritions and further details can be found in the corresponding paper.
In the following table you can find the binary raw BRDF data measured with our setup. The data structure consists of a simple header that contains 3 integer values representing the angle resolutions (3 * 4 byte [integer]), followed by the data part that contains the sample values, which are stored in double format (8 Byte).
If you use this data, please, reference the correspoding paper:
@Article{s18010013,
AUTHOR = {Bulczak, David and Lambers, Martin and Kolb, Andreas},
TITLE = {Quantified, Interactive Simulation of AMCW ToF Camera Including Multipath Effects},
JOURNAL = {Sensors},
VOLUME = {18},
YEAR = {2018},
NUMBER = {1},
ARTICLE NUMBER = {13},
ISSN = {1424-8220},
ABSTRACT = {In the last decade, Time-of-Flight (ToF) range cameras have gained increasing popularity in robotics, automotive industry, and home entertainment. Despite technological developments, ToF cameras still suffer from error sources such as multipath interference or motion artifacts. Thus, simulation of ToF cameras, including these artifacts, is important to improve camera and algorithm development. This paper presents a physically-based, interactive simulation technique for amplitude modulated continuous wave (AMCW) ToF cameras, which, among other error sources, includes single bounce indirect multipath interference based on an enhanced image-space approach. The simulation accounts for physical units down to the charge level accumulated in sensor pixels. Furthermore, we present the first quantified comparison for ToF camera simulators. We present bidirectional reference distribution function (BRDF) measurements for selected, purchasable materials in the near-infrared (NIR) range, craft real and synthetic scenes out of these materials and quantitatively compare the range sensor data.},
DOI = {10.3390/s18010013}
}