International Journal of Information and Communication Sciences
Volume 3, Issue 2, June 2018, Pages: 42-49
Received: Sep. 16, 2018;
Published: Sep. 18, 2018
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Linyi Hu, State Key Labortory of Virtual Reality Technology and Systems, Beihang University, Beijing, China
Zhihong Wang, State Key Labortory of Virtual Reality Technology and Systems, Beihang University, Beijing, China
Lighting design is very important to improve rendering quality for some 3D scenes that are used in the VR applications with night simulation. Determining the properties of the light sources requires a large amount of artwork, especially when the number of lights is large. Most virtual scenes always have some geometric objects with similar structures and shapes. Based on this observation, this paper proposes an example based light source generation method by using local geometric similarity. An example model decorated with light source and a target model are input to this method. First this paper segments both model into parts with SDF segmentation algorithm, and find matched parts between the example model to the target. Then two methods are applied to transfer the light sources decorated on the parts of the example model to the corresponding parts of the target model. Minimum spanning tree based light transfer method is used to generated light sources for target parts with the same pattern as lights layout on its corresponding parts from the example model. While texture synthesis based method tiles the light texture generated from the example parts on the surface of the target parts. At last, the position and colors of the light sources are refined. The results demonstrated that this method can quickly and effectively edit light sources for large-scale scenes, reduce the amount of art work and achieve good visual effects.
Example Based Light Sources Generation Method for 3D Scenes, International Journal of Information and Communication Sciences.
Vol. 3, No. 2,
2018, pp. 42-49.
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