A Computer Graphics Approach to Discomfort Index Modeling

A Computer Graphics Approach to Discomfort Index Modeling

Makarov D.N. (MPEI, Moscow, Russia)
Budak V.P. (MPEI, Moscow, Russia)

Abstract

The article presents an enhanced methodology for calculating the Unified Glare Rating (UGR), aimed at improving the adequacy of lighting condition assessments. Criticizing the limitations of existing calculation systems (DIALux, Relux), the authors propose a combined approach that utilizes computer graphics resources (the 3ds Max package) for modeling and a mathematical platform (Matlab) for analysis. The innovative aspect lies in the implementation of a clustering algorithm, which replaces the computationally intensive per-pixel analysis of glare sources. This increases the accuracy of UGR determination by 10% and brings the model closer to the biomechanisms of vision. The obtained data underscores the significant impact of reflection coefficients (at ρ > 0.8) on the level of discomfort. The developed method is of practical interest for specialists in the fields of lighting design and architecture.

Keywords

Unified Glare Rating (UGR); visual discomfort; specular reflections; computer graphics; 3D visualization; glare source clustering; reflection coefficient; ray tracing; lighting design software; visual perception physiology.

Edition

Proceedings of the Institute for System Programming, vol. 38, issue 3, part 3, 2026, pp. 65-78

ISSN 2220-6426 (Online), ISSN 2079-8156 (Print).

DOI: 10.15514/ISPRAS-2026-38(3)-36

For citation

Makarov D.N., Budak V.P. A Computer Graphics Approach to Discomfort Index Modeling. Proceedings of the Institute for System Programming, vol. 38, issue 3, part 3, 2026, pp. 65-78 DOI: 10.15514/ISPRAS-2026-38(3)-36.

Full text of the paper in pdf (in Russian) Back to the contents of the volume