• Girish Ramesh

Student thesis: Phd


Physically-based rendering techniques enable more realistic and accurate models to be created. In the field of computer graphics, rendering of hair is achieved by approximating the effect of light scattering in hair fibres as well as within a hair strand. These approximations are made in order to create visually pleasing images for games, movies and other forms of media. However, for the purpose of hair research, numerically accurate simulations are required. These can be constructed using data obtained from various physical and chemical experiments along with lighting and imaging calculations. Presented here is a proposal for a novel four stage framework for visualisation, testing and evaluation of hair shine that can replace physical laboratory testing used in the industry. The thesis describes how the framework uses various laboratory experiments to obtain physical parameters of hair along with shine measurement values. These values are then used in hair rendering models that have been optimised for hair shine to render images of hair tresses in well defined physical and lighting setups. The images are then used in a novel evaluation system to measure realism, shine and other characteristics within hair rendering that is similar to industry standard gloss evaluation. Image processing techniques are also described to obtain hair rendering parameters from images of hair are also used to create a complete framework that can use both physical parameters as well as images to produce visualisations.
Date of Award1 Aug 2019
Original languageEnglish
Awarding Institution
  • The University of Manchester
SupervisorMartin Turner (Supervisor) & Franz Wortmann (Supervisor)


  • hair
  • shine
  • rendering
  • computer graphics

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