AUTONOMOUS LIGHTING IN 3D SCENE BASED ON SCENARIO TRACKING AND DIRECTOR’S BEHAVIOR

Abstract

One of the most important things in cinematography is lighting. Lighting in cinematography has many roles besides to illuminate the objects, such as to make its edge clearer thus it looks sharper, has a depth to expose the 3D impression, has separation so it can stand out from the background, and so on. Unfortunately, it is very hard to gain a good lighting due to many issues that affect the lighting result, such as the type of the light source, its intensity, position, and direction. Referring to these parameters, then there will be a lot of permutations and variations that can be obtained to illuminate an object. Another issue that also causes the automatic lighting process becomes difficult is because the process of lighting is heavily influenced by the tastes of the director. Therefore, it can be said that there is more than one right way to light the scene. In this article, the designer designs the initial scene based on the data from the storyboards, then it will become the input of the autonomous lighting process which will add some additional light sources to gain a good lighting set based on director's behavior. There are eight scenes from a short animation movie used in this article as inputs. This movie uses the Cornell Box as the sphere/set. Bidirectional Reflectance Distribution Function (BRDF) algorithm combined with fuzzy logic are involved in this article to calculate the intensity of the bounced lights. As the result, most designers assess six of the eight outputs have been as expected