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Posted: Sun Dec 04, 2016 3:03 am
Since a few months ago I looked at sharpening using the Lab Color luminescence channel and it seems to work much better than anything else.
Has anyone tried it? What were your results? Conclusions?
Posted: Mon Dec 05, 2016 7:52 am
Several years back I gave my hand at a variety of sharpening techniques. The two choices that seemed to get the best overall quality were the Lab sharpening and the High Pass techniques. Both require a bit of a process but I found that the High Pass technique was easier for me to remember and implement how to do. That, by no means, is an endorsement on one technique over another, it just what I found easiest for me. While Lab processing is a bit more complex, a simple Photoshop action would make this a much simpler process.
That said, there are more than these two ways of sharpening an image and ultimately which method you use would be dependant on the subject matter. For example, for portraiture I would rather use Frequency Separation to sharpen/soften different parts of the face. For general sharpening I like the easy High Pass method, but for those rare occasions where I need a little more help in my sharpening... Lab is a great method. Let's also not forget the granddaddy of them all, Unsharp mask.
Posted: Sun Dec 18, 2016 8:35 pm
A similar sharpening can be done using PS CC ACR filter.
Open an image, duplicate. Select duplicate. Change to smart object.
Change the duplicate blend mode to Luminosity.
Select ACR filter
Change saturation to 0.
Use clarity to sharpen.
Use a mask control the effect location
Use opacity to control the intensity of the effect.
You can use this to play with the other sliders just for fun, results will vary...