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Advanced High-Pass Sharpening

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  #11  
Old 02-17-2009, 11:09 AM
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igot2pman igot2pman is offline
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Re: Advanced High-Pass Sharpening

Quote:
Originally Posted by Ich.Mario View Post
using a high pass layer for sharpening is overrated in my opinion. with unsharp mask, you can control, with the threshold slider, the sharpening process better.
am i wrong?
You can compensate for the threshold with the "blend if" sliders... which in the end offers more control.

The high pass method is also non-destructive and can be toned down later if need be.

-Keven
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  #12  
Old 02-17-2009, 11:10 AM
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Re: Advanced High-Pass Sharpening

I tend to use high pass on scanned vintage negatives or on older prints where grain/texture is quite apparent. Particularly, tiny contact prints that need to go up in size and soften as they do.

Regardless of settings, it's hard work to get decent sharpness with USM while suppressing the graininess in these.

To my eye high pass offers an overall appearance of sharpness without highlighting the grain so much. It's a bit like the usual 10/50/0 local contrast USM, but with more edge detail and settings variety.
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  #13  
Old 02-17-2009, 11:12 AM
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Re: Advanced High-Pass Sharpening

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Originally Posted by igot2pman View Post
The high pass method is also non-destructive and can be toned down later if need be.
I'll 2nd that.
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  #14  
Old 02-17-2009, 11:32 AM
undavide undavide is offline
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Re: Advanced High-Pass Sharpening

Hi,
HighPass is just the other side of the coin of Gaussian Blur, which is really close to sharpening. I won't go deeper in the subject here as I've posted something more exhaustive in another post in the forum here. I don't have PixelGenius plugin, but separating light/dark halos is something usually requested. You can use two copies of the sharpened layer in Lighten and Darken blending mode, toning down each opacity separately. You can also transfer light and dark halos only in two layers with different blending modes and use curves to tweak them.
Cheers,
Davide
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  #15  
Old 02-17-2009, 02:48 PM
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Re: Advanced High-Pass Sharpening

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Originally Posted by Southbay View Post
Yeah, things move by blindingly fast. Can't help you nail down the steps and I guess Schewe isn't telling. My layers looks like this...which for a PS noob like me, offers enough latitude.
Can you double click the layers and check the blend if settings for the image lighten and darken layers. I have a feeling that the lighten has blacks protected and the darken has the whites protected. Having them separate ads more control if it is done this way.

As both grey layers are the same, or at least look it. You can check by setting both layers at normal blending mode at 100% opacity. Then turn the top on and off, if there the same let us know.

Also, if you could let us know if both layers are set to overlay blending mode and 66% opacity. Lastly, what is the blending mode of the folder?

-Keven
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  #16  
Old 02-17-2009, 03:26 PM
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Re: Advanced High-Pass Sharpening

These should help.

The PK sharpening set provides three levels of high pass – this is level 1. Both light and dark contours affect different parts of the image, with the light layer having the greater overall impact.
Attached Images
File Type: png HighPass opened.png (26.6 KB, 38 views)
File Type: png Light Contour.png (34.5 KB, 49 views)
File Type: png Dark Contour.png (33.9 KB, 38 views)
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  #17  
Old 02-17-2009, 06:53 PM
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Re: Advanced High-Pass Sharpening

How its done:
  1. Copy merge
  2. Highpass at 1.9
  3. Overlay blending mode
  4. 66% opacity
  5. Use the above blend if settings (Alt+ click to seperate sliders)
  6. Duplicate
  7. Use other blend if setting
  8. Name appropriately
  9. Move into folder and name appropriately

All done...

I am assuming that the level 2 & 3 would just be a higher Highpass. The key is the blend if settings.

Hope it helps,
-Keven

Last edited by igot2pman; 02-17-2009 at 07:06 PM.
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  #18  
Old 02-17-2009, 08:25 PM
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Re: Advanced High-Pass Sharpening

Hey Keven,

You've got to get out and breathe some air once in a while. Seriously, tho...thanks for shedding some light (and dark) on this. I'm gonna stumble my way through your steps in a bit and see what happens.

Cheers
SB
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  #19  
Old 02-18-2009, 01:15 AM
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Re: Advanced High-Pass Sharpening

Quote:
Originally Posted by Southbay View Post
You've got to get out and breathe some air once in a while.
I'll try and open a window...

-Keven
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  #20  
Old 02-18-2009, 02:50 AM
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Re: Advanced High-Pass Sharpening

Far too clever for me ! I think I'll have to look for some tutorials and try getting my head round some of this stuff . Bill
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