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Could an Algorithm Help with the Light, or lack of it?
How often have you thought ‘it’s not a bad image but, somehow it just doesn’t quite do the scene justice’. When extreme of shadows and highlights are present, today’s cameras just can’t capture the range that the eye can. To get a better result it used to be necessary to be a Photoshop guru, but since the arrival of Lightroom there are more intuitive ways to rescue an image. With Lr2 it just keeps getting better at that kind of task, with the Targeted Adjustment Tools being perhaps the stars of the show.
However, there are times when a different approach seems to achieve a better result, for me at least. I’ve no golden rule about which type of shot this applies to, but often landscapes with leaden skies, or shots of the interior of old castles or cathedrals are likely to be candidates. Of course you can probably guess where I’m heading with this - yes HDR, well almost but not quite.
With HDR the recommended approach seems to be to use auto bracketing to take a series of shots (3, 5, 7 or even 9) with a +/- EV, in RAW format, normally using a tripod. Even if you have a tripod to hand, the camera you have with you might have limited bracketing abilities. There can be strong views about these requirements and while bracketed jpeg’s seem to be just about acceptable, any other deviation is labeled ‘pseudo HDR’ or some other derogatory term.
I’m always hoping to capture the scene that I remember - I’ve no wish to create the extreme, surreal, other worldly HDR images that we’ve all seen posted online. With that objective in mind I’ve found that using HDR software, (in particular Photomatix) on a single image can help to enhance an otherwise flat image. Rather than put a label on the process, I just see it as another recipe using imaging software to achieve a particular result.
The routine I use involves creating two virtual copies of the chosen image in Lightroom, and then applying an EV adjustment of say 1.5 (plus on one copy, minus on the other). The three files are then selected and exported via plug-in to Photomatix for processing. Once processed the resulting HDR image is Tone Mapped. Fine tune to your own taste - but hopefully the resulting image will reveal more depth and be more appealing than the original. Of course it’s all a matter of personal taste but hopefully the before and after images shown here help illustrate that.
The vendors of Photomatix (www.hdrsoft.com) have recently issued a new beta version of their Lightroom plug-in and it seems to be a great improvement on the earlier version. But, I still have a small beef about it. When you save the processed image in Photomatix, you are brought back to Lightroom with the enhanced image as a new import. Still, it would be nice it you were returned to the location you started from, (perhaps within a collection), as happens with other Lr plug-ins. Gripe over.
In outlining this process I may just be proving that my Lightroom skills are not what they might be, since a close approximation of the result could perhaps have been achieved without the round trip journey. I've tried side-by-side comparisons with other processes and blending methods, but I like the results achieved from the process described. I’m simply trying to recreate the scene I remember, and sometimes the algorithms within Photomatix seem to help deliver that. Just think of all the images you took years ago, which have the potential to be ‘refreshed’.
I should mention that in some cases the processing may result in noise issues, which can of course be dealt with either in Lightroom or another application.
There are a number of other applications out there which might help achieve similar results, but that’s maybe a topic for another time. Meantime if you have your own ‘recipes for realism’ I hope you’ll post them below. One day we’ll laugh about all the software manipulation that’s necessary to get there today
Les Haig




This looks like a great alternative to double-processing RAW files! I've shied away from double-processing RAW files because of the added masking involved to blend the images together. Your HDR method takes care of that.
BTW, if you check the option to stack the processed image with the original file (an option in the Photomatix plug-in), the imported image from Photomatix will show up in the same place as your original files, without popping you to the imported images section of Lightroom's catalog.
I think its all just cheese on toast bollucks.
Dave,
Hope you find that it's an alternative that sometimes works.
As far as the import back to Lightroom is concerned, I should probably chill, and remember that the plug-in is still a beta. I've been unable to consistently get the result you mention - but I think that's maybe because I'm usually starting the journey from a keyword filter. As far as I can see the keyword doesn't pass through on the return, but imagine that might be sorted. Anyway apologies to Photomatix, my workflow habits seem to be to blame.
Petey,
Maybe it should be described as toasted bollox?
LR2 has improved dramtically in its ability to extract RAW detail. It will now achieve much the same result from a single RAW file (with judicious use of the various tone controls) to what can be achieved with Photomatix and the 3 versions of a single image that you describe. To get the best results you need the latest update, LR 2.2
Photomatix is a superb piece of software and will also give an excellent result from a single RAW file. Better still though is to feed it with images bracketed 2 stops (shutter speed; keep Aperture constant and AF off). 3 images is a minimum, 5 will cover most scenes, with 7 or 9 for extreme contrast.
It is possible to get very photo-realistic images in Photomatix from extreme contrast scenes with careful use and thoughtful post-production.
I wrote this up a while back for Canon Europe and there is a link + small piece on my blog: blog.nickwb.com also a list of recommended reading on the Canon site.
Nick.
Nick,
Thanks for the information - you've achieved some enviable results. Clearly for architectural work at the professional level, using several bracketed RAW's offers the most reliable way to consistently achieve realistic images.
Enjoyed reading the blog and also the extremely informative article you authored for Canon.
Les
You're welcome Lee. Thanks for taking a look.
One thing that many don't realise is that currently HDR requires a lot of post-production to get useful results. Some of this can be done in LR, but much requires heavyweight work in Photoshop, so a knowledge of layers is useful and leaving images in 16bit is essential.
Best,
Nick.
Thanks for your guys post.
I learned a lot.
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