I have been playing with the new HDR feature on the iPhone 4 and finally was able to snap a set that really showed this feature perfectly.
When you take a picture with HDR on the iPhone saves a non-HDR copy as well. These photos were, of course, taken at the exact same moment.
I was in my car, the day was overcast and it was around 4PM. My car is dark as it has aggressively tinted windows, including the windshield. The subject matter is boring, but it’s a fine representation of HDR vs non-HDR.
In the non-HDR shot, on top, you can see that the iPhone was focusing on the dash of the car and the background was washed out.
The HDR shot captured the full image and is more true-to-life what I saw that day. The background is not necessarily in focus, but it is not washed out and you can clearly see what was taking place, with more detail, more shadows. The interior of the car looks more real to life. You can see the texture of the leather on the steering wheel. The dash does not look super glossy. You can see the lines separating the buttons on the steering wheel. Good stuff! You can also see shrubs on the hill across the street, which can barely be seen in the non-HDR image.
More info about HDR.
A Flickr set of HDR pictures taken on the iPhone 4. Some of these are just amazing, especially when there is a good balance of light and dark, which HDR is supposed to optimize.