This chapter introduces fast shading and shadowing method in Mixed Reality. We create realistic soft shadows of virtual objects in a fast and efficient way using shadowing planes and a set of pre-rendered basis images. In the preparatory stages, we generate shadowing planes from convex hulls of objects and render basis images with basis lights which approximate the illumination of the real world. We then synthesize basis images with luminance parameters and generate shadow images which correspond to the current illumination. Finally we map shadow images onto shadowing planes and express soft shadows of objects in real-time. The proposed method can support both dynamic changes of illumination and movements of user’s viewpoint. We successfully achieve the consistency of illumination and improve the quality of synthesized image in MR-systems.
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Kakuta, T., Oishi, T., Ikeuchi, K. (2008). Virtual Asukakyo: Real-time Soft Shadows in Mixed Reality using Shadowing Planes. In: Digitally Archiving Cultural Objects. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-75807_22
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DOI: https://doi.org/10.1007/978-0-387-75807_22
Publisher Name: Springer, Boston, MA
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