Environment matting into photographs using coloured RTcams


Li, C., Hall, P. and Willis, P., 2008. Environment matting into photographs using coloured RTcams. In: IET 5th European Conference on Visual Media Production, 2008-11-27 - 2008-11-28.

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There has been continuing interest in using environment matting to capture the real-world's reflection and refraction from a foreground object. Environment matting require a calibrated warp, which is often defined non-parametrically. Although this is a powerful approach it suffers from two basic limitations: (i) there is a "blind spot" that cannot be a calibrated; (ii) a slight change in the object requires a full recalibration.This paper introduces a parametric approach that can overcome both of these limitations. We build upon a generalised model of a non-linear camera called an RTcam (Rational Tensor Camera, introduced in Section 3), for the first time showing its value to environment matting. In addition, we show how a restriction on RTcams can simulate the change in colour of an object as it appears in a coloured reflector (refractor). Hence we account for both geometric and colour changes with a single mathematical model. Finally, we show how, using the same camera model, the reflector properties can mapped from one to another.


Item Type Conference or Workshop Items (UNSPECIFIED)
CreatorsLi, C., Hall, P. and Willis, P.
Related URLs
DepartmentsFaculty of Science > Computer Science
Research CentresMedia Technology Research Centre
ID Code33801


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