Abstract
Lighting has much more importance than simply establishing visibility. In cinematography, theatre and videogames, good lighting is expected to create images with emotional content, set atmosphere and mood, direct attention and provide depth to a two-dimensional image. Lighting design is the process of finding light parameters: positions, directions, colours, and intensities to achieve the visual properties wanted for a specific scene. The traditional method of lighting design for a scene is iterative, requiring trial and error until the desired goal is reached. This is a repetitive and tedious work, which requires technical and artistic expertise in the field. Inverse lighting design aims to provide designers with semi-automated approaches and easy to use tools, to configure lighting for scenes, minimizing the time and expertise needed. This work will explore lighting by example. More specifically, the possibility of using videos and images as examples for lighting 3D scenes. The major goal of the proposed system is to emulate in the virtual scenes the same mood present on the short videos or images used as input. Tests were conducted with users, rating the mood of images used as input of the system and the resulting automatically illuminated 3D scenes. The obtained results were satisfactory, presenting some similar ratings.