CorvusCroax
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So, we know how to take a curve and make it into a green component...
http://www.filterforge.com/filters/679.html http://www.filterforge.com/filters/1619.html Is it possible to do the same thing, but in reverse? That is, create a curve from a map (or other) input? Is that just impossible? |
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| Posted: January 21, 2009 11:02 pm | ||
ThreeDee
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Sounds pretty impossible. What are you trying to achieve?
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| Posted: January 26, 2009 1:43 pm | ||
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ThreeDee
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Okay, let's say a bit more, since nobody else has answered... For instance, if you had a fairly basic curve that you could generate by plugging the image output into curve green inputs, you could so a very rudimentary version of this, but not really the same thing in reverse.
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| Posted: January 26, 2009 1:46 pm | ||
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ThreeDee
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Another way to approximate this is to do what I did with the Histogram filter. You can take an image input and extract (for instance) Histogram information out of it.
You could get any channel histogram approximation that way -- lightness, hue, saturation, etc. And you could blur the curve before thresholding it to smooth it out some. What you get is not a real curve, of course, but a green-component representation of a curve, like the example you have in your first post. |
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| Posted: April 9, 2009 3:00 am | ||
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