Regular photo
HDR photo
Wednesday, December 5, 2012
Cool HDR Photo
My iPhone has an HDR (High Definition Range) photo setting. I keep this turned on so I get 2 photos every time I take a picture, a regular exposure and an HDR exposure. The HDR is actually a compilation of 3 differently exposed photos which tends to give better results in certain cases. Anyway, yesterday I was at Tempe Town Lake riding my Brompton folding bike. I stopped at a picnic table to read for a while and saw a skateboarder coming. I took a picture and was surprised by the HDR results. The skateboarder was moving too fast for the iPhone's camera to take the same exact photo 3 times. Here are the interesting results:
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OK, just in case other people might also be a bit confused, I'll put it here so we can all get the benefit of your explanation.
ReplyDeleteThe iPhone couldn't take the same picture 3 times? Why would it need to?
Why would you want the HDR one with three images? To show movement or something? I suppose I could Google HDR, but that's the easy way out.
Pete "the confused one"
Basically HDR photography is a technique to overcome shortcomings of cameras. The human eye is very good at seeing contrast and white balance. Cameras not so much. That's why you get over/under exposed pictures where one part of the photo is good and other parts are not exposed correctly. HDR handles this by taking 3 pictures at different exposures. By combining the 3 and using some magic software you end up with a much more vivid picture. "Real" cameras can handle a moving object. As we see in this picture the iPhone camera software isn't quite as smart in this regard.
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