[argyllcms] Re: Number of patches vs. profile quality
- From: Vittorio Villani <vittoriovillani@xxxxxxxxxxx>
- To: ArgyllCMS List <argyllcms@xxxxxxxxxxxxx>
- Date: Wed, 4 May 2011 11:08:38 +0200
Hi Greame.
I am
talking only about RGB printers here (my limited experience). I am using Epson
and I did some prints with Canons too.
I think
that you can find something that may be interesting in this post:
http://www.luminous-landscape.com/forum/index.php?topic=53408.0
I suggest
you to read this post:
http://www.luminous-landscape.com/forum/index.php?topic=53408.msg436947#msg436947
It would be
nice to have your opinion on this.
I can give
you my 2 cents.
1) Some have reported the “blue shift
issue”, that you have already commented and fixed in the 1.3.3 beta.
2) Usually people know as “experts” (I
am just a beginner) report that it is very useful to have some low-saturation
patches. I don’t know how the actual Argyll targen works; but I saw that it is
often suggested to add some patches to have a better profile, using procedures
similar
to the one described in the message I have linked.
3) I am not seeing noticeable
improvements with my test prints using more than 2500 patches. I found that
2000/2500 is a good number. I am using targen with –G and –g256; I have seen
that more patches around the grey axis give me better results in BW printing
(less colour casts). I did not try –s and –p parameters, many suggest to use –s.
4) I think that the possibility of
making a pre-conditioning profile is very interesting. I don’t know how this
actually works, but talking with other people I found that some could get good
results with less patches (1000/1500) using a 800 patch pre-profile or a profile
provided from the paper/ink manufacturer.
Hope this can be useful.
Vittorio Villani
> Date: Wed, 4 May 2011 13:11:45 +1000
> From: graeme@xxxxxxxxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Number of patches vs. profile quality
>
>
> I am interested in hearing about peoples experience with profile
> quality vs. number of test patches using Argyll. In particular, I'd
> like to get an impression of what aspect of a profiles quality are seen
> as improving as more patches are used. If this aspect is color accuracy,
> is there a particular area of the color gamut that is seen as the
> critical area ? If so, what area is it ?
>
> [I'm wondering if the profiling efficiency can be improved by some simple
> changes to the patch distribution.]
>
> thanks,
>
> Graeme Gill.
>
Other related posts:
