On 5 Jan 2016, at 11:50, Jorge . <chocolate.camera@gmail.com> 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