I try to understand the place of the detail slider in the algorithm of unsharp masking roughly.
Do you have any link for this information?
Doesn't much look like Un-sharp Mask to me as lower settings of Detail sharpen edges to remove blurring and higher settings make the textures in the image more pronounced, whereas the Masking slider controls the edge mask. I believe that the detail slider all the way to the right uses a 'deconvolution' sharpening algorithm.
If you hold down the Alt key while moving any of the Sharpening sliders you can see the effect in white.
If you want to learn about Unsharp Mask have a look at: http://dougkerr.net/Pumpkin/articles/Unsharp_Mask.pdf
Thanks a lot ... I'm now have a more clear picture.
Is there any side effect using a high radius - high detail value with high frequency data?
I compare my settings (radius: 3, detail: 100) with the own Lr preset for landcapes.
And ... with my simple test file, I'm getting more sharp results without creating halos.
Maybe, I'm missing something with my simple test file ... what can any adverse effects be using my settings on scenics?
I think that high radius cancels the negative effect of high detail in the low frequency part of my file ... and high detail cancels the negative effect of high radius on the high frequency part.
When used with a suitable amount, the tiny halos noticable even at the 1:1 view with the scenic preset disappeared mostly + a more sharp image we get on the high part.
I don't have so much experience so far with those edge contrasting sliders ... any idea?
So ... I think that highest possible radius (3) with highest possible detail (100) ... plus 50 amount would make high frequency data razor sharp without any halo.
And ... for the lower parts of the image, with any adjustment tool apply some minus sharpening (between 0 and minus 50 ... ~-20 may be enough for the most cases)
I would like to learn what the expert users would say about my new capture sharpening technique?
Thanks a lot.
Bertan Gülhan wrote:
It seems that the sharpening in Lr uses an improved derivative of unsharp masking.
What is the function of the detail slider in the context of unsharp masking?
All explained here:
The sharpening in LR isn't USM per se, it's an adaptive sharpening so don't try to compare them.