Matching the appearance of different BRDF (material) models across renderers

Seminar
This event has now finished.
  • Date and time: Wednesday 7 June 2023, 5pm to 7pm
  • Location: TFTV/109, School of Arts and Creative Technologies East, Campus East, University of York (Map)
  • Audience: Open to staff, students, the public
  • Admission: Free admission, booking not required

Event details

The appearance of rendered objects in digital 3D prototyping and design is dependent on the underlying BRDF (Bidirectional Reflectance Distribution Function) implementation used by rendering software packages. However, the lack of standards for exchanging material parameters and data between different tools poses challenges for artists. They often have to manually match the appearance of materials to a reference image, which can be non-uniform and counterintuitive due to the complex nature of BRDF models.

To address these challenges, two strategies will be presented. The first strategy, titled "Towards a Consistent, Tool Independent Virtual Material Appearance," involves a post-processing technique that aims to match the rendering of the source renderer to the target renderer. This approach focuses on achieving consistency and independence from specific rendering tools.

The second strategy, called "Perceptually Validated Cross-Renderer Analytical BRDF Parameter Remapping," introduces a real-time BRDF remapping technique. It automatically computes a mapping to match the appearance of a source material model to a target material model. The remapping framework is validated through quantitative analysis, user studies, and psychometric scaling experiments. These experiments demonstrate that the remapping technique produces visually faithful results when applied to different analytical BRDFs.

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Meeting ID: 970 4197 3598

Passcode: 627701

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About the speaker

Day’ra Guarnera (University of York)

Dar'ya Guarnera is a Lecturer in AI at the School of Arts and Creative Technologies (University of York). Her interests include  AI, computer graphics and human perception of colour and material appearance, with applications such as material acquisition and representation, and 3D visualisation. 
After being awarded a BSc in Architecture from the Odessa State Academy of Civil Engineering and Architecture (Ukraine) and a degree in Computer Science from Liverpool Hope University, she began her research in the physically-based rendering area at Loughborough University, where she received her PhD in computer science in 2018. Before joining the University of York, she was a senior researcher at the Norwegian University of Science and Technology (NTNU).

Venue details

  • Wheelchair accessible

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