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I've uploaded a python script for applying a curve to a curve - that is, concatenating two ACV files so that you end up with a new file that has the effect of applying two curves, one after the other. I did this so I could use profiling tools (like Eisenlord's digital negative script, and presumably ChartThrob) iteratively. That is, you can get close by printing a step wedge, scanning it, using it to find a curve, and using that curve in your printer description. Then you can do the whole thing all over again but print to the newly curved printer - which if things are going perfectly gives you a linear result. But if the result is not linear, you can apply the new curve to the old one, and get a "refined" curve.

If you've never wanted to do this, you can ignore this upload. But if you, like me, have always wanted to... well, here you are. Familiarity with python and the shell/Terminal are necessary to use this - sorry, no GUI.

The script is called catacv.py. It requires that you have Python and a variety of Python libraries (numpy, scipy, struct) installed, and the script is run from the command line via
python catacv.py curve.acv delta.acv new.acv

Best wishes - Eben

QTR-Quadtone RIP

Concatenating ACV files (curves)

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