ILLUMINATION RECOVERY FROM IMAGES WITH CAST SHADOWS

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dc.contributor.advisorQu, Gangen_US
dc.contributor.advisorJacobs, Daviden_US
dc.contributor.authorMei, Xueen_US
dc.contributor.departmentElectrical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2007-09-28T14:55:57Z
dc.date.available2007-09-28T14:55:57Z
dc.date.issued2007-05-02en_US
dc.description.abstractThe effects produced in an image by cast shadows can be quite complex, especially when light comes from all directions. This makes it difficult to recover the illumination from a scene and recognize objects from the images. In this paper, we show that such images can be well approximated using much simpler lighting represented by a combination of low frequency spherical harmonics, and a small number of directional sources. Therefore, the illumination of the scene can be recovered by summing the spherical harmonic lighting and a small number of directional light sources. To demonstrate the effectiveness of the proposed method, we have successfully tested it by using sets of synthesized images rendered by directional light sources or environment maps with different objects.en_US
dc.format.extent563378 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/7148
dc.language.isoen_US
dc.subject.pqcontrolledEngineering, Electronics and Electricalen_US
dc.subject.pquncontrolledillumination recoveryen_US
dc.subject.pquncontrolledcast shadows,en_US
dc.titleILLUMINATION RECOVERY FROM IMAGES WITH CAST SHADOWSen_US
dc.typeThesisen_US

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