In this paper, we restate the model of spatio-chromatic sampling in single-chip digital cameras covered by Color Filter Array (CFA)¹. The model shows that a periodic arrangement of chromatic samples in the CFA gives luminance and chromatic information that is localized in the Fourier domain. This representation allows defining a space invariant uniform demosaicking method which is based on the frequency selection of the luminance and chrominance information. We then show two extended methods which used the frequency representation of the Bayer CFA^2,3 to derive adaptive demosaicking. Finally, we will show the application of the model for CFA with random arrangement of chromatic samples, either using a linear method based on Wiener estimation⁴ or with an adaptive method⁵.

Date Published: 28 January 2008
PDF: 13 pages
Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68221M (28 January 2008); doi: 10.1117/12.771656

Published in SPIE Proceedings Vol. 6822:
Visual Communications and Image Processing 2008
William A. Pearlman; John W. Woods; Ligang Lu, Editor(s)