Maggie's Farm

We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.

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Wednesday, December 30. 2009

HDR

Capt. Tom posted a snow photo of an old Ford truck enhanced by HDR. I had no idea what HDR is, and I mainly/only take family snaps.


Apparently it is High Dynamic Range imaging. I wouldn't term it a surrealistic effect: more like a hyper-realism effect. Like an oil painting. Or like what the eye sees, when gazing at a certain spot.


This guy discusses how to use HDR. It's over my head. Maybe a reader can make it simple for me.


This fine night photo of NYC is in large scale here.



Posted by The Barrister in Hot News & Misc. Short Subjects at 13:35 | Comments (9) | Trackbacks (0)

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Where's Merc when you need him?
#1 Garry on 2009-12-30 13:35 (Reply)
HDR is sort of Adams' Zone System for digital. Most scenes have a dynamic range (dark to light) greater than can be captured by a digital camera. So either something gets lost in the shadows or some highlights get overexposed and lose detail. In HDR you bracket exposures (underexposed, normal, overexposed) to be sure you get all the detail, then use photo software to use the parts that have the detail to create a single image capturing a very wide range. It can be used in a subtle manner, but most people seem to turn it up to 11.
#2 Cris on 2009-12-30 14:26 (Reply)
This is why I enjoy your blog...never know the shape of the learning curve.
#3 jma on 2009-12-30 16:13 (Reply)
There's a lot of heavy handed HDR floating around the tubes, giving the edited photos an unreal effect. I shoot digital mostly in the same manner I shoot slide film, that is I typically meter for the highlights and let the shadows fall where they may. With digital this style allows editing in RAW to open up the lighter shadows without significant degradation of the image (unless, again, the edits are heavy handed or the ISO equivalent was pushed too far). I'm satisfied with my results, but I'm not expecting miracles, either. HDR editing may virtually open up the shadows in a HDR scene, but given the requirements it seems more like it would be a novelty for most people rather than a serious tool.
#4 Jephnol (Link) on 2009-12-30 17:55 (Reply)
BD - Forget it. There are three probs:

1. The actual process is fairly straightforward; you're just taking the same pic with three different shutter speeds and superimposing them over one another. The problem arises because you most likely don't have a hi-def monitor, so you won't see them in their true glory.

2. The bitch is the process to convert them so they look good on regular monitors. Playing with histograms is a nasty, sensitive, easy-to-screw-up process. He couldn't even give specific instructions, just because every pic requires different 'tuning'.

3. You don't own Photoshop ($699).

Maybe I could have saved us some time by just listing #3. :)
#5 Dr. Mercury (Link) on 2009-12-30 18:24 (Reply)
Merc to the rescue.

Barrister,

Over my head too.
#5.1 Garry on 2009-12-30 21:28 (Reply)
Oops -- sorry, Barrie. Thanks, Gar.
#5.1.1 Dr. Mercury (Link) on 2009-12-31 06:11 (Reply)
Thanks for that link. Like #2 said ya never know where Maggies Farm will lead you too. I really enjoy your blog. Have a Happy New Year. Thanks again.
#6 Catara on 2009-12-30 22:50 (Reply)
I don't know diddly about photography. I thought that pick-up looked more like a painting than a photo, same with the fence you postedl. Nice effect.
#7 Santay on 2009-12-31 11:20 (Reply)

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