On 2013/01/30 9:13 AM, Paul Kuin wrote: > For what it's worth. > > While the RGB system is native to monitor devices, since they produce > light of certain colours, CMYK is the colour system of printer > materials etc. since they absorb the colours, but reflect those we > see. That means designs must be made in CMYK for pronter materials > and in RGB for our devices. The response of each medium or device is > different. RGB will have part of the colour space not accessible in > some devices, while in printed materials it is different again. The > basic thing is colour space, while RGB and CMYK can be seen as a map. > In the real world you have to look at the product to see if the > colours come out right. > > Not sure what to make of any implementation of this, but a simple > mapping should not be impossible.
Granted, a mapping within the intersection of the two spaces respectively accessibly to RGB and CMYK is possible, but I think it makes more sense to do it as a separate operation on the ps or pdf file than to try to build it into mpl. If it were to be built in, I think it would have to be bolted onto the ps and pdf backends. I suspect that the alpha channel will make this quite complicated, much more so than a simple mapping; it will require an intermediate rendering step. Eric > > Cheers, > > Paul > > On Wed, Jan 30, 2013 at 6:38 PM, Eric Firing <efir...@hawaii.edu> wrote: >> On 2013/01/30 6:43 AM, Michael Droettboom wrote: >>> We don't currently have any support -- and we're still struggling in >>> certain areas supporting RGBA consistently across the system. >>> >>> I think this would take someone writing a MEP (as a preliminary study of >>> all of the changes that would be involved) and then shepherding it >>> through implementation. >> >> My somewhat vague recollection is that CMYK is fundamentally >> output-device dependent, and therefore it really doesn't make much sense >> for a plotting library to support it directly. The conversion from RGBA >> should be made by the publisher, knowing what the output device >> characteristics are. >> >> Eric >> >>> >>> Mike >>> >>> On 01/30/2013 11:10 AM, Ignas Anikevičius wrote: >>>> On 29/01/13 03:37:51 -0800, Dieter wrote: >>>>> I was wondering if anything changed regarding this within the last 2.5 >>>>> years >>>>> since the last thread. Is there a way to produce CMYK with matplotlib? >>>> Hello everybody, >>>> >>>> I would be also interested in how to produce CMYK graphics without >>>> external fiddling. >>>> >>>> Cheers, >>>> Ignas ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_jan _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
