Re: GRAY_CURVE curve point pair format
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Paul
I thought for sure someone would answer but this is how it goes:
After GRAY_CURVE= should come numbers like this:
GRAY_CURVE= "0;0 4;5 8;10 15;15 32;20 40;25 46;30 51;35 56;40 60;45 63;50 65;55 69;60 72;65 76;70 79;75 83;80 87;85 91;90 95;95 100;100 "
Input/Output.
Think of it this way: your Inputs are ¡°bad¡± or off kilter and you want them to be made perfect 10, 20, 30, 40, 50 etc. (how I explain it to students).
I have never used 0-255, only 0-100. It¡¯s Pigment/Ink % not Light in Curve Display Options. Someone else can answer that.
Before QCDN this is how I wrote all my profiles, ink descriptor files with Gray Curve. Hundreds. Now I don¡¯t even have to think about how it¡¯s done with QCDN, but I kept the old qtr profiles
to remember the good ol¡¯ days.
Chris
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[Edited Message Follows]
I'm writing a quick script to serialize a curve defined in an acv from Photoshop to a string compatible with the GRAY_CURVE parameter in an ink descriptor file. Adobe's
defines each curve point pair as the output value followed by the input value. Additionally, each coordinate is a value in the range of 0¨C255.
1. Can anyone confirm whether GRAY_CURVE expects the format input;output or output;input?
2. Does 255 == 100 in GRAY_CURVE or is the value similar to the ink percentage in Photoshop where 255 == 0?
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