Digital Imaging Articles
Free HDR photography tips and standard digital imaging articles are offered on this site as well as image processing projects.
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High dynamic range imaging produces the tonal range which your eyes see but your camera can't record in one blink of the shutter. Two or more exposures are combined to produce the HDR image.
For example, in this neck of the woods (New Brunswick Canada), we have several covered, wooden bridges. With the naked eye, we can pick up the tonal information inside the bridge (with its shadows and other dark areas) as well as the neighbouring environment such as sky, grass or snow, river, etc.
Here is an HDR image of the Salmon River Covered Bridge outside Sussex New Brunswick.
Since digital cameras are not technically capable (yet!) to possess the high dynamic range of our eyes, if we meter for the bridge's interior, the outside will be too light or washed out; and if we expose for the sky, forget about recording the intensity levels of the wooden, inner recesses.
So we compromise. We incorporate a bracketing of exposures.
Take at least three exposures for HDR photography, making sure one is over-exposed, another is under-exposed and the third meets them halfway. For the above example, I shot five exposures.
But save for the last few years, there hasn't been an easy way to effectively combine the set of exposures.
Now, software has evolved to the point where it has made HDR a popular, everyday photographic term. A program like Photomatix will produce results that will make you say, "I can't believe my eyes. I mean, my eyes saw the original scene, but I didn't believe it until I saw what my eyes should've seen in the first place!"
With Photomatix, it's mission accomplished.
But before you see the program work its magic before your very eyes, you must give it something to prove its HDR photography mettle.
Go out in the field and collect some images.
Remember to bring your camera...tripod...and any sort of protection against the elements.
What kind of images are you looking for today? You might as well experiment. After all, you’re in digital country now. No more wasting big bucks on film. Just make sure your memory card has lots of storage space because we’re shooting each situation in triplicate or more.
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