For those of you who aren’t photographers, HDR stands for high dynamic range. It’s a technique for getting the widest possible range in a photo, from darkest darks to lightest lights without losing detail or blowing out the whites.
Taking one photo with a digital camera of this same room would probably not show much of the trees outside; the camera has to choose what you’re trying to photograph and usually, anything outside would vanish into white blur.
However, by combining three different exposures of the same scene, you can retain the trees outside while also showing the room properly exposed. I used a tripod to minimize jiggle and stacked the three photos in Photoshop CS5, which has a pretty good HDR feature.
HDR is becoming fairly common these days, and there are even filters that allow you to ‘hdr’ a single photo. I’ve used them, and they’re not bad. But the best way is to take three different exposures by bracketing at -2, 0, and +2.
Nice room, eh? Wish it was mine!