Optimized Color Transforms for Image Demosaicing
Evgeny Gershikov · 2013
Most demosaicing algorithms today are based on first reconstructing the green (G) color component followed by the reconstruction of the red (R) and the blue (B) components based on the green. This approach and the associated methods of using the differences R−G and B−G are arbitrary and in most cases not optimal. Instead, we propose optimal color transforms for demosaicing. This optimization is based on energy compactness and smoothness of the color components. We compare the performance of the proposed algorithms to presently available demosaicing methods and show that the new optimized approaches are superior both visually and quantitatively. Our conclusion is that the proposed color transforms improve the performance of demosaicing algorithms.