Comparing methods for detail enhancement?

[dkosiur]

Now that there seem to be so many different ways of enhancing detail in digital images, I'd love to see someone write up a comparison of these methods. There may be more, but I can think of 4 methods off the top of my head: ACR/Lightroom's Clarity, PhotoLift, DOP Detail Enhancer, and Local Contrast Enhancement (as described at Luminous Landscape, which I understand is not exactly the same as ACR's Clarity).

Any more methods?
Any one willing to take this on?

Thanks,
Dave

[KenS]

...
Any more methods?
Any one willing to take this on?

Thanks,
Dave
[a href=\"index.php?act=findpost&pid=169274\"][{POST_SNAPBACK}][/a]

Good question but tough to answer.  I've tried the following on four or five different images from my medium format Astia 100F and Velvia 100 transparency and B/W 100 TMax film scans:

Akvis Enhancer (two versions), Photolift, Photokit Sharpener Creative Sharpening and Photokit Sharpener Haze Cutter, The Lights Right (TLR) local contrast, Photomatrix Detail Enhancer, DOP detail enhancer, and USM 20,50,0 (and variations of that). Most of my comparisons were done at 50% or 100% views on my Artisan monitor but I also made 8x10 prints in some of these comparisons.

There are many factors to consider, some of which include:
- film scan vs. digital camera (I have no experience with images from digital cameras)
- is noise reduction applied before and/or after (I often use Noise Ninja)
- are you allowing for application of a curves adjustment as a final tweak after application of the local contrast boost (or do you wish the tool to do it all for you)
 - will you be applying a mask after the adjustment (I often mask out the sky and snow if there is any in my landscape scenes since these techniques increase noise)
- does the technique produce undesireable artifacts and if it does are you okay with spending some time to clone them out
- how important is the application interface to you (e.g. do you get feedback in a large viewing window while you are still using the application or do you have to commit the change and then view it in your image editor)
- does the application work on large files (mine are often 350 MB), does it crash, how long does it take to run
- is a batch mode important to you
- do you plan on doing capture sharpening first, then local contrast enhancement, finally output sharpening. You need to be careful you don't overdo it and take all three processes into account.
- cost !

In my testing there have been instances (e.g. with trial versions of Akvis Enhancer) when I was almost convinced it did a better job than USM 20,50,0 (or variations) but then tried adding  (on top of the USM layer) a Shadow/Highlight layer and/or curve layer in Photoshop and decided the result was better that way vs. Akvis.  (However, Akvis (etc) was useful in pointing me in a direction I did not visualize before using Photoshop tools).  In another case, there is one color image in which I could never duplicate the nice local contrast enhancement in a rock wall (Antelope Canyon) using USM that I was able to achieve with PhotoLift.  Maybe someone else could?

As of now I am happiest with PhotoLift.  I like the results, I like the interface (nice and big image view), can view previous changes, adjustable texture control is handy, it doesn't crash on my 350 MB files, doesn't produce artifacts.

Bottom line: I think you need to try these for yourself as I have ... trial versions are available.

Ken

[walter.sk]

Now that there seem to be so many different ways of enhancing detail in digital images, I'd love to see someone write up a comparison of these methods. There may be more, but I can think of 4 methods off the top of my head: ACR/Lightroom's Clarity, PhotoLift, DOP Detail Enhancer, and Local Contrast Enhancement (as described at Luminous Landscape, which I understand is not exactly the same as ACR's Clarity).

Any more methods?
Any one willing to take this on?

Thanks,
Dave
[{POST_SNAPBACK}][/a]

Focus Magic.  It's a "deconvolution" program that measures the width of blur in the image (for example, from the AA filter, or from resizing) and re-focuses the image.  It is easy to use and the effect is subtle, but after trying it to rescue porrly focused shots and being disappointed (it is not really going to do that) I finally began to see the improvement in all edges as well as fine detail.  I now use it on every image.  I don't have the link handy, but do a Google search for Focus Magic and download a free trial.

Oh..here is the link:

[a href=\"http://www.focusmagic.com/]Focus Magic[/url]

[JeffKohn]

Focus Magic is a great sharpening tool, but I think other tools mentioned here are different and are more along the lines of local contrast enhancement.

[bjanes]

Focus Magic.  It's a "deconvolution" program that measures the width of blur in the image (for example, from the AA filter, or from resizing) and re-focuses the image.  It is easy to use and the effect is subtle, but after trying it to rescue porrly focused shots and being disappointed (it is not really going to do that) I finally began to see the improvement in all edges as well as fine detail.  I now use it on every image.  I don't have the link handy, but do a Google search for Focus Magic and download a free trial.

Oh..here is the link:

Focus Magic
[{POST_SNAPBACK}][/a]

I am evaluating Focus Magic and find it promising. Unlike the unsharp mask which merely creates the illusion of increased sharpness, the deconvolution algorithms actually restore detail. Other deconvolution algorithms include Photoshop's smart sharpen (using the lens blur setting) and the Adaptive Richardson-Lucy Iteration. See [a href=\"http://www.clarkvision.com/imagedetail/image-restoration1/index.html]Roger Clark's[/url] for more details on RL.

Disadvantages of deconvolution are increased compute time and increased noise. On noisy high ISO images, I find that Focus Magic produces disturbing artifacts.

Bill

[pobrien3]

Another vote here for Focus Magic.  I find a setting of 1-2 (out-of-focus blur) for images full-size out of my 1DsII is a perfect capture sharpener.  I also agree about the unwanted effect on any noise in the image.  I mask any noisy areas off first before applying Focus Magic, and check the results viewing the file at 50%.  That's just a general guide to the process I follow, but if you find you're using much higher settings in FM then the results will start to look quite artificial.

Peter

[walter.sk]

Another vote here for Focus Magic.  I find a setting of 1-2 (out-of-focus blur) for images full-size out of my 1DsII is a perfect capture sharpener.  I also agree about the unwanted effect on any noise in the image.  I mask any noisy areas off first before applying Focus Magic, and check the results viewing the file at 50%.  That's just a general guide to the process I follow, but if you find you're using much higher settings in FM then the results will start to look quite artificial.

Peter
[a href=\"index.php?act=findpost&pid=171169\"][{POST_SNAPBACK}][/a]

I do my noise reduction on noisy images using Noise Ninja before using Focus Magic.  You can also produce a mask in Noise Ninja to save critical detail, as well.

[Jonathan Wienke]

Yet another vote for Focus Magic. If there's anything better for capture sharpening, I haven't found it yet.

[Arizona]

The Tonal Contrast filter in Nik Color Efexs 3.0 will find details that you didn't know you had. It has 6 sliders to adjust various elements. For some images it is nothing short of amazing. For others it can be too much but it is put down on its own layer so the opacity can be adjusted as well.

High Pass set at 2.0 on an Overlay layer is another good detail enhancer.