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DPChallenge Forums >> Hardware and Software >> PS : working of shadow/highlight function
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Showing posts 1 - 6 of 6, (reverse)
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12/11/2005 01:45:59 PM · #1
Hi,

I stubled across this forum a few days ago, seems a nice active one with a lot of good picture. So I think I try to browse here a little bit and see if it fits me ;-)

Now my question :

I have a problem with the SH function in PS. Sometimes I see a strange behavior of the function. It always appears when I have a picture with a not-normal histogram.
In short : The SH will always lighten the picture too much, regardless of the settings.

I included a picture underneath. Maybe it's a little but hard to see. But I do ask the darken the highlights by 1%. Instead of doing that the SH lightens the picture!! (see histogram)

Anyone any idea why it does what it does ? Or in other words : How should the histogram be so that I don't have this problem ?

//users.pandora.be/perrush/SH-na.JPG

Message edited by muckpond - changed large image to link.
12/11/2005 01:51:57 PM · #2
NVM... I misread what you were saying.

Message edited by author 2005-12-11 13:53:07.
12/11/2005 04:28:40 PM · #3
Is there a way to emulate the shadow/highlight function in PS7? Doesn't matter if it's basic legal or not. Needed for personal use making prints, stock photos, etc.
12/11/2005 04:32:50 PM · #4
I use the tutorial here on DPC which was suggested to me a while back with great success. Dont know about what you are using, I have PS7 and was nota ware that it had that capability, or are you using a newer version of PS?

Shadow/Highlight Tutorial
12/11/2005 04:33:33 PM · #5
Originally posted by faidoi:

Is there a way to emulate the shadow/highlight function in PS7? Doesn't matter if it's basic legal or not. Needed for personal use making prints, stock photos, etc.


Yes. Cntrl-alt-tilde (~) selects a feathered selection of the bright areas. Cntrl-J makes a new layer mask with that selection on it. Then go back to base layer, cntrl-alt-tilde again, cntrl-shift-I to invert the selection, and cntrl-J to make a new layer mask for shadows.

Set the shadow mask to screen and the highlight mask to multiply and adjust relative layer opacities to balance. If you are doing it on a flat pcture, first create a dupe layer from BG, amp up the contrast on that layer, do the selections and make the layer masks, toss the amped-contrast layer, and screen the highlight layer and multiply the shadow layer.

R.
12/11/2005 04:36:16 PM · #6
Originally posted by bear_music:

Originally posted by faidoi:

Is there a way to emulate the shadow/highlight function in PS7? Doesn't matter if it's basic legal or not. Needed for personal use making prints, stock photos, etc.


Yes. Cntrl-alt-tilde (~) selects a feathered selection of the bright areas. Cntrl-J makes a new layer mask with that selection on it. Then go back to base layer, cntrl-alt-tilde again, cntrl-shift-I to invert the selection, and cntrl-J to make a new layer mask for shadows.

Set the shadow mask to screen and the highlight mask to multiply and adjust relative layer opacities to balance. If you are doing it on a flat pcture, first create a dupe layer from BG, amp up the contrast on that layer, do the selections and make the layer masks, toss the amped-contrast layer, and screen the highlight layer and multiply the shadow layer.

R.


Sweet. Thanks :)
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