Camera Lens Design and Optimisation for Flare Rendering
Making Lens Flare Rendering Accessible
N.H. Van Acoleyen (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Elmar Eisemann – Mentor (TU Delft - Computer Graphics and Visualisation)
R. Marroquim – Mentor (TU Delft - Computer Graphics and Visualisation)
Peter A.N. Bosman – Graduation committee member (Centrum Wiskunde & Informatica (CWI))
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Abstract
Lens flares occur when a bright light source induces light to travel through an optical lens system via unintended paths, reaching the sensor at an undesired location. Although arising from the imperfection of lens systems, flares are widely used in the visual entertainment industry for artistic purposes and to increase perceived brightness.
Research on physically accurate lens flare rendering has come far and produced convincing results by considering the inner construction of the lens and how light interacts with it. However, obtaining a specific flare signature through these algorithms requires lens design expertise that the typical artist does not possess.
This thesis demonstrates how to obtain optical lens systems that achieve a desired flare effect, without requiring prior knowledge of lens construction. We achieve this through simplified controls and evolutionary algorithms. With this method, existing lenses can be tweaked, or even new ones can be built from scratch. The process abstracts the lens and algorithmic parameters, making these rendering algorithms accessible to a wider range of users.