I'm working on an image with a colour variation in the sky which I don't like. Its blue at the top, moves around more towards cyan at the bottom. The HSB space is phenomenal here (have tried changing this outside curvemeister and given up, even with the much lauded Lab space, although I'm still quite new to it so the failing might be mine - I don't quite see how to easily do red-cyan corrections in it. anyway....).
So I've added a control point for the blue(H=213) I like, and once for the cyan-ish-blue(H=206) I don't. I move the latter point to where I like it, now the sky's wonderful. Of course the rest of the colours are shot to pieces, because the curve swings out either side of my correction. I've added a whole bunch of other points to bring rest of the curve back to straight. The result's great, but I'm wondering.....
Is there a feature to keep most of a curve straight, and just adjust a small portion of it?
"Straight Line Except" Option?
Greg is correct. In fact, he requested a feature to facilitate this even more, that turned out to be a bit to challenging for me to implement.
Making skies darker is one of the big uses for masking. Usually the sky is the brightest thing in the image, so the Lightness channel of Lab is a good place to start. Another possibility would be the B channel of RGB, or even the b channel of Lab.
Making skies darker is one of the big uses for masking. Usually the sky is the brightest thing in the image, so the Lightness channel of Lab is a good place to start. Another possibility would be the B channel of RGB, or even the b channel of Lab.
How about a "Pin from Here" command.
It would let you select a point on the curve and pin everything from "here" to upper Right or lower left.
"Here" being a point I have set on the curve at or near the center line. This way I could...
1) Mark my point from the image that I want to adjust.
2) Select a point above or below that point and say "Pin From Here".
3) Adjust my marked point without having to re-set the rest of the curve.
This way the adjustment starts at the curve with a pinning and you already have logic to pin from the center up or down...then you do not have to interpolate the curve to get smoothly back to the center line and you avoid odd or flat spots on the curve. I could set the Pin from here mark anywhere I want so long as It starts on the curve before it is adjusted.
Greg
It would let you select a point on the curve and pin everything from "here" to upper Right or lower left.
"Here" being a point I have set on the curve at or near the center line. This way I could...
1) Mark my point from the image that I want to adjust.
2) Select a point above or below that point and say "Pin From Here".
3) Adjust my marked point without having to re-set the rest of the curve.
This way the adjustment starts at the curve with a pinning and you already have logic to pin from the center up or down...then you do not have to interpolate the curve to get smoothly back to the center line and you avoid odd or flat spots on the curve. I could set the Pin from here mark anywhere I want so long as It starts on the curve before it is adjusted.
Greg
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derekfountain
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