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The algorithm for enviroment matting is not entirely clear to me. I understand that each pixel is encoded using 3+18n parameters which accounts for everything including refraction. Then we take the images of the object before a sequence of backdrops so that we can estimate the parameters. This is where the confusion lies. How does one keep the scene static as the backdrops are changed? It is that if we are filming at 30fps then we have to change the backdrops much more than 30fps. I am a bit confused at this point

Papers for February 6 include

J. F. Blinn, Jim Blinn's Corner: Compositing, Part 1: Theory, IEEE Computer Graphics and Application, 14(5), Sept. 1994, pp 83-87.

D. Zonker, D.M. Werner, B. Curles and D.H. Salesin Environment Matting and Compositing , SIGGRAPH 1999, pp. 205-214.
 
 Environment matting extensions: towards higher accuracy and real-time capture Yung-Yu Chuang, Douglas E. Zongker, Joel Hindorff, Brian Curless, David H. Salesin, Richard Szeliski , SIGGRPAPH 2000, pp. 121 - 130
 
Video matting of complex scenes Yung-Yu Chuang, Aseem Agarwala, Brian Curless, David H. Salesin, Richard Szeliski

M. Koudelka, S. Magda, P. Belhumeur, D. Kriegman, “Image-based Modeling and Rendering of Surfaces with Arbitrary BRDFs,” IEEE Conf. on Computer Vision and Pattern Recognition, 2001, pp.568-575 (primarily Section 3.3)