Iliah Borg wrote: > Before demosaicking, that is before some form of recombination of raw > channels, we do > not have colour information at all. We need to run recombination / > demosaicking to > calculate two missing components for each pixel. Raw channel data is some > form of > monochrome, recorded as shades of grey so to speak. Hmm. You don't need full resolution data to do a white balance, and yes, you have color information- you have the camera filter RGB values from the raw cells. Each cell is a point sample out of it's 2x2. ("Demosaicking" is all about trying to invent detail that wasn't actually captured, and it generally shows if you look at the pixels. A downsample by 50% to the actual sampling interval always looks a whole lot better in my view. It all seems to be numbers game, driven by marketing. If displays were rated the same way as cameras, they would magically increase the numbers of pixels by 3, without an visual change ...) Graeme Gill.