ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
Session ID : MIP2000-4/AIT2000-4/
Conference information
Image-based Daylight Simulation : Sunrise to Sunset Simulation
Xiaohui ZHANGMasayuki NAKAJIMA
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In this paper, we present a new approach to simulate the daylight from sunrise to sunset based on a small set of photographs or CG generated images. The coherence character among image sequence at different times of day is employed, and each image under different illumination is thought to be expressed by two kinds of informations: common information and individual information. The color correction technique used in colorimetric is borrowed in this paper to relate color appearance from source image to color appearance under new illumination. A small set of photographs or CG synthesized images at different times of day are used as refernce images. From the reference images, a light-independent image, a shadow database and a color correction matrix database are constructed. Then new image at arbitrary time of day can be re-rendered quickly by executing shadow synthesis and color correction operation. Our result shows the daylight from sunrise to sunset can be simulated quickly without sacrificing the realism.

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© 2000 The Institute of Image Information and Television Engineers
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