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"asymmetric" frequency separation?

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Old 12-24-2011, 02:35 PM
kav kav is offline
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Re: "asymmetric" frequency separation?

Originally Posted by Der_W View Post
Asymmetrical spatial frequency separation (full terms ) is not the usual symmetric spatial frequency separation (hence the "a" in front of symmetrical, although nobody would ever call it like that).
The whole idea of using an "asymmetric" split was (I guess) introduced by Murray and referred to the idea of having all the color information on the low pass layer instead of having most color on the low pass and some on the high pass.
This is actually a pretty simple technique that works by first duplicating your low pass layer, blurring the lower one and setting the top one to "Color" mode. Now merge these two layers and perform the usual split with the high pass layer.

I guess the earliest information about it was here:
And after a while Murray created a thread about it that I unfortunately can't find right now.

Edit: Found it I guess although it was not a thread but a post in the very thread I just linked:

I think I was in a bad mood yesterday, but if anyone wishes to take me up on it, I would bet I can do everything enabled by that technique in a simpler manner with a smaller file size . I've tested so many ways of doing things, and the simple ones often work the best. Too many odd layers often just creates preview bugs making the image more difficult to complete.
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Old 12-24-2011, 04:22 PM
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Der_W Der_W is offline
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Re: "asymmetric" frequency separation?

That'd be nice :-).
I'm always in for improving my workflow and techniques.

Though we should probably discuss this in a different thread not to confuse the OP even more?
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Old 12-25-2011, 01:55 AM
ShadowLight ShadowLight is offline
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Re: "asymmetric" frequency separation?

... I'm not sure about the benefits of that approach
pull the luminosity only (example img 1)
or desaturate (different thing, so - example img 2)

and see how much HF detail will be dumped on the LF
Attached Images
File Type: jpg test1-lum.jpg (84.3 KB, 31 views)
File Type: jpg test2-desat.jpg (90.5 KB, 25 views)

Last edited by ShadowLight; 12-25-2011 at 02:24 AM.
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