Re: FOGRA39 CMY-only profile (no black)
Re: FOGRA39 CMY-only profile (no black)
- Subject: Re: FOGRA39 CMY-only profile (no black)
- From: Martin Orpen <email@hidden>
- Date: Tue, 05 Jan 2016 13:04:22 +0000
On 5 Jan 2016, at 11:50, Jorge . <email@hidden> wrote:
>
> Xicclu’s docs describe an optional argument to indicate, yet again, the black-generation rule, the syntax of which seems identical to colprof’s. I do not quite understand what it means to run xicclu with an explicit black-generation rule while its input profile having been created with yet another explicit black-generation rule, identical or different. At any rate, xicclu still provides identical charts for all four profiles for the same black-generation rule.
Hi Jorge
Not sure why you’re not seeing differences in your profiles?
If you want to just use ISOcoated_v2_eci.icc it would be easier to use the original data set — I used targen & fakeread as an example as it can be used if the original data isn’t available :)
I’ve just made a couple of profiles and they work as expected.
Convert the data to ti3 format:
txt2ti3 FOGRA39L.txt
Create a K max profile:
colprof -v -kx FOGRA39L
Create a K min profile:
colprof -v -kz FOGRA39L
When I plot the gray axis of each profile I get exactly what I expect from:
xicclu -g -fb FOGRA39L.icc
The -kx version shows massive black generation and -kz shows none until the CMY channels have reached maximum.
And with xicclu you don’t need to make new profiles just to see what the black generation will look like — just use “-fif"
So I can take the kx version that I’ve made above and use it to plot a chart showing how it would behave if I’d used kz to create the profile:
xicclu -g -fif -kz FOGRA39L_KX.icc
HTH
--
Martin Orpen
Idea Digital Imaging Ltd
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