UTIA BTF Database

This page lists public BRDF samples that are optionally available for download. As in BTF section we will grant temporal and individual access. Please just fill the form below and the requested dowload link will be sent to your email address shortly.

Some of the original sample specimens can be provided upon request, so you can supplement our data with any additional property measurements.

Dense BRDF Measurements (resolution 2^o)

uniform sampling with step 2^o,7920 illum. x 7920 view directions, (44 elevations, 180 azimuths). For more details see the reference below.

fabric112
angular resolution: 7920 x 7920 = 44180 x 44180 data available: EXR, PNG specimen available: yes

fabric135
angular resolution: 7920 x 7920 = 44180 x 44180 data available: EXR, PNG specimen available: yes

fabric136
angular resolution: 7920 x 7920 = 44180 x 44180 data available: EXR, PNG specimen available: yes

Data lookup and interpolation code

Reference:

BIB PDF

Effective Acquisition of Dense Anisotropic BRDF (Filip J., Vavra R., Havlicek M.), In proceedings of the 22th International Conference on Pattern Recognition, ICPR 2014, pp. 2047-2052, 2014

Dense BRDF Measurement (resolution 0.5^o)

These are additional measurements to material fabric02 (uniform sampling 15^o). It consists of nine BRDF subsets at three fixed illumination/view elevation angles. Each subset has 720 illum. x 720 azimuthal illumination and view directions. For more details see the reference below.

fabric02 - dense
azimuthal resolution: 0.5^o elevations: 0^o,30^o,75^o total samples: (3 x 720) x (3 x 720) data available: EXR, PNG specimen available: yes

Reference:

BIB PDF

BRDF Slices: Accurate Adaptive Anisotropic Appearance Acquisition (Filip J., Vavra R., Haindl M., Zid P., Krupicka M., Havran V.), In proceedings of the 26th IEEE Conference on Computer Vision and Pattern Recognition, CVPR 2013 2013

Adaptively Measured Anisotropic BRDFs (resolution 2^o) The provided datasets contain measured datasets as well as full interpolated BRDFs, rendered scenes and supplementary materials. The data are provided for three materials (fabric112, fabric135 and fabric136) and two counts of measured function's values (8911 and 18721). Each provided dataset then consists of the following:
fabric###_measuredData_NNNNN_schemeXX		data measured using regular uniform schemeXX
fabric###_measuredData_NNNNN_slices		data measured using BRDF slices
fabric###_measuredData_ground_truth		data measured for evaluation

fabric###_denseBRDF_NNNNN_barycentric		BRDF interpolated from fabric###_measuredData_NNNNN_schemeXX using barycentric interpolation, resolution 2^o
fabric###_denseBRDF_NNNNN_RBF		BRDF interpolated from fabric###_measuredData_NNNNN_schemeXX using RBF interpolation, resolution 2^o
fabric###_denseBRDF_NNNNN_slices		BRDF interpolated from fabric###_measuredData_NNNNN_slices using the method based on the BRDF slices, resolution 2^o

fabric###_rendered_NNNNN_barycentric		image rendered using fabric###_denseBRDF_NNNNN_barycentric
fabric###_rendered_NNNNN_RBF		image rendered using fabric###_denseBRDF_NNNNN_RBF
fabric###_rendered_NNNNN_slices		image rendered using fabric###_denseBRDF_NNNNN_slices
fabric###_rendered_ground_truth		image rendered using fabric###_measuredData_ground_truth

measuredData_columns_headings		description of fabric###_measuredData_...
rendered_scene_angles		angles in the rendered scene
rendered_scene_mask		mask of pixels used for evaluation
`### .......... material's number NNNNNN ....... count of samples XX ........... 14 (if NNNNN is 08911) or 19 (if NNNNN is 18721)`
	fabric112
	fabric135
	fabric136