Presentation is loading. Please wait.

Presentation is loading. Please wait.

Gonio-Spectrophotometer for Low-Uncertainty Bidirectional Scatter Distribution Function (BSDF) Measurements A. M. Rabal, J. L. Fontecha, A. Ferrero, A.

Published byEvan Kennedy Modified over 9 years ago

Similar presentations

Presentation on theme: "Gonio-Spectrophotometer for Low-Uncertainty Bidirectional Scatter Distribution Function (BSDF) Measurements A. M. Rabal, J. L. Fontecha, A. Ferrero, A."— Presentation transcript:

1 Gonio-Spectrophotometer for Low-Uncertainty Bidirectional Scatter Distribution Function (BSDF) Measurements A. M. Rabal, J. L. Fontecha, A. Ferrero, A. Pons, J. Campos y A. Corróns IFA-CSIC Ciencia y Tecnología del color. Seminario 2009

2 Outline BSDF. Theory Aims Instrument description Measurement procedure
Future work Ciencia y Tecnología del color. Seminario 2009

3 BSDF. Theory Directional Hemispherical Conical Nicodemus, 1977
Ciencia y Tecnología del color. Seminario 2009

4 Aims Realization of diffuse reflectance and reflectance/radiance factors standards Uncertainty from the non-lambertianity in standards Relation between coloured-objects BSDF and the spatial distribution of the chromatic coordinates Ciencia y Tecnología del color. Seminario 2009

5 Instrument description
Ciencia y Tecnología del color. Seminario 2009

6 Instrument description
Ciencia y Tecnología del color. Seminario 2009

7 Instrument description
Ciencia y Tecnología del color. Seminario 2009

8 Instrument description
Ciencia y Tecnología del color. Seminario 2009

9 Measurement procedure
Direct Auxiliar System Irradiance, E Indirect Ciencia y Tecnología del color. Seminario 2009

10 CoordinatesTransformation
X Z X Y A Source Spherical Coordinates BSDF i Degrees of freedom of experiment s i Z s Germer, 1999 Y Detector Ciencia y Tecnología del color. Seminario 2009

11 Fitting to a BSDF Model Model HTSG (He, Torrance, Sillion, Greenberg) (1991) Ideal specular Directional diffuse Uniform diffuse Fitting experimental data to a model 0, , BRDFud Ciencia y Tecnología del color. Seminario 2009

12 Future work Assessment of the angles for the proper characterization of the BSDF Determination of the characteristic parameters of the materials: 0, , BSDFud Relation between BSDF and object appearance: knowledge of object RADIANCE for every direction within the observer frame Ciencia y Tecnología del color. Seminario 2009

13 Gonio-Spectrophotometer for Low-Uncertainty Bidirectional Scatter Distribution Function (BSDF) Measurements A. M. Rabal, J. L. Fontecha, A. Ferrero, A. Pons, J. Campos y A. Corróns IFA-CSIC Ciencia y Tecnología del color. Seminario 2009

Download ppt "Gonio-Spectrophotometer for Low-Uncertainty Bidirectional Scatter Distribution Function (BSDF) Measurements A. M. Rabal, J. L. Fontecha, A. Ferrero, A."

Similar presentations

Analyse statistique et physique d'images hyperspectrales planétaires: objectifs, objets et méthodes.

Analyse statistique et physique d'images hyperspectrales planétaires: objectifs, objets et méthodes.
Claude Beigel, PhD. Exposure Assessment Senior Scientist Research Triangle Park, USA Practical session metabolites Part II: goodness of fit and decision.

Claude Beigel, PhD. Exposure Assessment Senior Scientist Research Triangle Park, USA Practical session metabolites Part II: goodness of fit and decision.
William A.P. Smith and Edwin R. Hancock Department of Computer Science, University of York, UK CVPR 2009 Reporter: Annie Lin.

William A.P. Smith and Edwin R. Hancock Department of Computer Science, University of York, UK CVPR 2009 Reporter: Annie Lin.
Spherical Harmonic Lighting Jaroslav Křivánek. Overview Function approximation Function approximation Spherical harmonics Spherical harmonics Some other.

Spherical Harmonic Lighting Jaroslav Křivánek. Overview Function approximation Function approximation Spherical harmonics Spherical harmonics Some other.
Computer Vision Radiometry. Bahadir K. Gunturk2 Radiometry Radiometry is the part of image formation concerned with the relation among the amounts of.

Computer Vision Radiometry. Bahadir K. Gunturk2 Radiometry Radiometry is the part of image formation concerned with the relation among the amounts of.
Spherical Convolution in Computer Graphics and Vision Ravi Ramamoorthi Columbia Vision and Graphics Center Columbia University SIAM Imaging Science Conference:

Spherical Convolution in Computer Graphics and Vision Ravi Ramamoorthi Columbia Vision and Graphics Center Columbia University SIAM Imaging Science Conference:
Measuring BRDFs. Why bother modeling BRDFs? Why not directly measure BRDFs? True knowledge of surface properties Accurate models for graphics.

Measuring BRDFs. Why bother modeling BRDFs? Why not directly measure BRDFs? True knowledge of surface properties Accurate models for graphics.
The Radiance Equation Mel Slater. Outline Introduction Light Simplifying Assumptions Radiance Reflectance The Radiance Equation Traditional Rendering.

The Radiance Equation Mel Slater. Outline Introduction Light Simplifying Assumptions Radiance Reflectance The Radiance Equation Traditional Rendering.
Radiometry. Outline What is Radiometry? Quantities Radiant energy, flux density Irradiance, Radiance Spherical coordinates, foreshortening Modeling surface.

Radiometry. Outline What is Radiometry? Quantities Radiant energy, flux density Irradiance, Radiance Spherical coordinates, foreshortening Modeling surface.
Acquiring the Reflectance Field of a Human Face Paul Debevec, Tim Hawkins, Chris Tchou, Haarm-Pieter Duiker, Westley Sarokin, Mark Sagar Haarm-Pieter Duiker,

Acquiring the Reflectance Field of a Human Face Paul Debevec, Tim Hawkins, Chris Tchou, Haarm-Pieter Duiker, Westley Sarokin, Mark Sagar Haarm-Pieter Duiker,
Advanced Computer Graphics (Spring 2013) CS 283, Lecture 8: Illumination and Reflection Many slides courtesy.

Advanced Computer Graphics (Spring 2013) CS 283, Lecture 8: Illumination and Reflection Many slides courtesy.
 TOM MALZBENDER & RAMIN SAMADANI— Hewlett-Packard Laboratories  STEVEN SCHER and ADAM CRUME-- University of California Santa Cruz  DOUGLAS DUNN-- 3M.

 TOM MALZBENDER & RAMIN SAMADANI— Hewlett-Packard Laboratories  STEVEN SCHER and ADAM CRUME-- University of California Santa Cruz  DOUGLAS DUNN-- 3M.
Illumination Model How to compute color to represent a scene As in taking a photo in real life: – Camera – Lighting – Object Geometry Material Illumination.

Illumination Model How to compute color to represent a scene As in taking a photo in real life: – Camera – Lighting – Object Geometry Material Illumination.
University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2006 Don Fussell Previous lecture Reflectance I BRDF, BTDF, BSDF Ideal specular.

University of Texas at Austin CS395T - Advanced Image Synthesis Spring 2006 Don Fussell Previous lecture Reflectance I BRDF, BTDF, BSDF Ideal specular.
CSCE 641: Photon Mapping Jinxiang Chai. Outline Rendering equation Photon mapping.

CSCE 641: Photon Mapping Jinxiang Chai. Outline Rendering equation Photon mapping.
Representations of Visual Appearance COMS 6160 [Fall 2006], Lecture 2 Ravi Ramamoorthi

Representations of Visual Appearance COMS 6160 [Fall 2006], Lecture 2 Ravi Ramamoorthi
3-D Computer Vision CSc83029 / Ioannis Stamos 3-D Computer Vision CSc 83029 Radiometry and Reflectance.

3-D Computer Vision CSc83029 / Ioannis Stamos 3-D Computer Vision CSc Radiometry and Reflectance.
Appearance Models for Graphics COMS 6998-3, Lecture 2 BRDFs and Radiometry Many slides courtesy Pat Hanrahan:

Appearance Models for Graphics COMS , Lecture 2 BRDFs and Radiometry Many slides courtesy Pat Hanrahan:
© 2002 by Davi GeigerComputer Vision January 2002 L1.1 Image Formation Light can change the image (and appearances). What is the relation between pixel.

© 2002 by Davi GeigerComputer Vision January 2002 L1.1 Image Formation Light can change the image (and appearances). What is the relation between pixel.
Computer Graphics (Fall 2008) COMS 4160, Lecture 19: Illumination and Shading 2

Computer Graphics (Fall 2008) COMS 4160, Lecture 19: Illumination and Shading 2

Similar presentations

Ads by Google