Wednesday, January 21, 2009

High Dynamic Range (HDR) Images

I am absolutely fascinated by HDR photos. If you haven't seen HDR photos, take a look at this website: Smashing Magazine.


I thought in this post I would not only show you my latest HDR photo, but let you in on the secret of what HDR is and how to do it.

The basic element of HDR photography is bracketing your shots. Which, for non-photographers, simply means you take several shots in which the exposure changes to over and under expose the same image. While camping over the weekend, I took a series photos of the small lake there. For the images below; the first shot is more or less the "correct" exposure, the second images is under exposed by 2 full stops and the third is over exposed by 2 full stops. You can easily tell that the sky looks more dramatic under exposed (2nd) but darkens the trees while the over exposure (3rd) details the trees but blows out the sky.HDR simply takes the three images merges them so that the "good" parts of each photo are used. In the final image, below, you can see that the water is from the 1st shot, the sky is from the 2nd and the trees are from the 3rd (more or less).

Ultimately, HDR photos show an exaggerated depiction of what my eye really saw that day. Hope you like.

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