Photoshop and Elements > What's your Workflow

Blend If option

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ganna:
Since Chris started with the subject of Blending under the "Sharpening" subject, I was doing research and a lot of playing. This example is a way to replace ie a burned out sky. Please tear this story appart if there are better or easier ways. (I use PS CS4) This is not a perfect sky colour, I just want to share the workflow.
1. In PS duplicate the original layer (Crl + J) and rename CM.
2. Open in CM and under RGB (screenshot 1) I moved the red and green sliders down on the right hand side to change the colour of the sky to blue. Everything else also change to blue, but ignore for now. Go out of CM (save)
3.Double click on right hand side of the layer (CM) to open "Layer Style" window (screenshot 2). Move Dark slider of "This layer" under Blend If to the right (here 150) This will now prevent the CM adjustment from affecting any tonal value of 150 and lower.
Look at the horizon left of Zebra's nose.. a harsh transition. To soften this transition, hold the alt key while double clicking on this slider and move the right hand half to the right (here 185) We have created a feathering effect. No value below 150 is affected and from 151 is affected gradually more until the full strenght is active from 185 to 255 (screenshot 3)
4. Fine tuning can be done with a layers mask. Paint with a black brush on the layers mask to prevent the undesireable blue effect on the white of the zebra.
5. Can also paint with a large soft edged brush on the horizon for furher fine tuning and lastly we can lower the opacity of the CM layer to say 85%.

themightyzog:
Hi Ganna,

I'm glad you are getting into BlendIFs, I think it would be great if CM had that facility - I'm surprised that Greg has not jumped in to show you how this can be done entirely within CM.  This screen shot shows you how with the mask facility (I used the L channel) it is easy to do.

Playing with the CM mask feature can be a bit tricky at first, but then with a little practice it is quite easy - the trouble is trying to remember that the feature is there!

Happy Easter
Chris

derekfountain:

--- Quote from: themightyzog on April 11, 2009, 02:43:13 AM ---This screen shot shows you how with the mask facility (I used the L channel) it is easy to do.

--- End quote ---

What's going on with that fringe around the mane? Ganna's image didn't have that!

themightyzog:
Not being able to set the mask well enough!!  I'm sure Greg will show you the correct curve for it.

I should add that personally I think that the BlendIF feature gives one much more control when making colour changes to objects - especially in Lab as you can adjust each channel independently and decide how much of the original and adjustment layer you want to show through.

Greg Groess:
Zog,

I am going to take a hack at the zebra but I wanted your take on this as well you have hit upon one of the problems with masking.  The fringe on the mane is troublesome and may require a bit more work.

As I continue to explore masking in CM, it is starting to be apparent that it can be a blending option.  When we think of mask we typically think of hard black and hard white.  I have been exploring areas where the tonal areas can help.  The image of the child on the beach for instance.  The green is not consistent across the entire image and blending may be a better option.

For the Pony in this image...OK Zebra...The fringe should be able to be reduced you might try setting the hardness of the mask. 

I'll have more on this hopefully later today.
I will say that because of you..yes you Chris...I am trying to learn much more about Blend If.

Greg

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