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ColorToneCurve6789

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Image (10) | Imagedata (10) | Color tone curve (2) | Lc 6+7+8+9 (2)
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  • Hermann Hoch
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  • 11 February 2018
Color tonality curve for LC 6/7/8/9 (pure LC Script)
Color tonality curve for images = LC-Magick #10 (=Raspi stack #104)

version 1.0.2 of Feb 11, 2018 ... Added RGB channel option, improved speed
version 1.0.1 of Feb 11, 2018 ... First public release

This "pure" LC-Script stack runs on Mac/Win/Linux using LC 6/7/8/9, and on RaspberryPi using (the for Raspi available) LC 651 or LC 704.
Use it best with LC 6 (from speed reasons).
Tip: When editing the handles set the selectionHandleColor to "red". RightClick a handle to remove it or to add another handle.

A "color tonality curve" is a color function that is applied to the color values of your input image. The input values are on the horizontal axis (x) the output values are on the vertical axis (y).

We set here the curve
= by an editable formula or
= by 2 up to 9 handles (control points) that determine either
.. * a polygon chain (linear pieces between the control points)
.. * a bezier curve of order 1=linear, 2= square ... up to order 8
.. * a natural spline curve (control points are on the curve)
.. * a clamped spline curve (control points are on the curve)

See also
http://forums.livecode.com/viewtopic.php?p=163787#p163787
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