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DPChallenge Forums >> Hardware and Software >> Let's learn photoshop - curves
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Showing posts 26 - 26 of 26, (reverse)
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 07/13/2012 04:34:14 PM · #26
Originally posted by kirbic:
The really basic thing to remember about curves is that the curves dialog is a simple graphical representation of the "mapping" from a range of input values to a range of output values. The input values are on the X (bottom) axis and the output values are on the Y (left) axis. Imagine a vertical line from an input value up to the curve, then horizontally to the left to the output value.

So:
- If the curve is a straight diagonal line from lower left to upper right corner, there will be no change from input to output.
- Where the curve is adjusted to be below this diagonal line, the output values will be lower than the input
- Where the curve is adjusted to be above this line, the output values will be higher than the input

Remember that the orientation of the graph can be reversed by clicking on the scale just below it, so you'd drag the curve in the opposite direction -- otherwise it works the same.

Originally posted by vawendy:
Has anyone ever played with tbe pencil tool in curves? I just went and made a series of horizontal lines, and it looked pretty funky.

Try using the regular curves graph but drag several points into a funny shape to get cool psychedelic color effects -- I usually start by shaping it like a letter M or W ...

... this gallery has several other screenshots of various "extreme" or special-purpose curves ...
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