HDR how do you cope with the extended range?

[John]

"HDR how do you cope with the extended range?"

Shoot a single properly exposed ETTR RAW file, let the shadows fall where they may and normalize later in Photoshop.

SOOC and after PP in Photoshop.
Note: due posting limits and the use of a small sensor m4/3 camera these examples just give you a crude idea of what's possible. APS-C and FF, of course, would be better.

[Marko]

Although your example is decent, this technique loses against real hdr (making multiple exposures of The same image at different exposures) 100% of the time.

If you let the shadows fall where they may....you have noisy shadows - even in this example.

When you use HDR to cover the shadows, and the highlights and the midtones, it only stands to reason that the file will always have more info...thus better.

Royce Howland and I recorded a podcast that describes problems like noise and how to beat it. (with HDR )
http://www.photography.ca/blog/2013/...ic-aberration/
Hope that may help

[ericmark]

With the example you show with straight defined edges it is easy enough to blend two images, there is no need for a HDR program, in fact since also different focus two images blended together would kill two birds with one stone.

The problem arises where there are no easy defined lines, there are a number of programs from Photoshop, to the specials like Picturenaut and Photomatrix which can be used to combine, however if you simply extend the range, then the photo becomes very wishy washy so we try to do two things, one extend the range, and two use local tone mapping to return the punch one needs. However in some cases this can produce halos around the edges.

There are all sorts of tricks, including in 32 bit mode loading a black and white image into the mask, it can be time consuming, but also you can get some very good results. In the three years since starting the thread I have learnt many tricks, however the problem is they take time, so job one is to work out is it worth it? I have just been processing some woodland images, and tried a number of ideas including taking a sky from another image, however after trying, the best option was to simply crop away the sky.

[John]

"Although your example is decent, this technique loses against real hdr (making multiple exposures of The same image at different exposures) 100% of the time."

Trust me I get all that but don't make the technically perfect the enemy of the good. Bracketed tripod mounted multiple shoots, at least for me and many others are, often, just not practical in the real world. The real world is often not that static and cooperative. I was just suggesting another and more practical technique for dealing with high dynamic range shots.

Case in point. A quick and dirty snap shop of my very black cat in a extreme back lit situation. I had only seconds to frame, focus, adjust hgram and fire. Maybe not Ansel Adams perfect but more than good enough for my purposes and, I think, many others. There's more to a good image than just technique.

[Marko]

I hear ya. Especially for cats and subjects that move. I'm a huge cat lover - what a beauty!

But Ansel aside, the noise in this file (to my eye) is a distraction. You choose the perfect subject (backlit scene with a black cat) to illustrate the point.

The cat's left side of its face, is full of noise... the 'corrected' exposure curve was pushed too far.

I can see it here in the web version with my own eyes... (and once you see it...you cannot ignore it, so for me this is an 'Okay' file). It would be way more noticeable if you printed it old school at 4 x 6 inches. Personally i don't use HDR all that much - but when used, you are getting a significantly better image.

Hope that may help - JMO