In fixing someone else's images, the main part of which being making the white balance remotely humane (awful, awful camera output
), I've been reading up on white balance, and now I'm curious: what, if any, non-SLR digital cameras allow you to calibrate the white balance using a grey card (or a random grey or white sheet of paper)? Is this a standard feature these days that most people just never discover, or is this typically only found on SLRs?