[argyllcms] Re: Generating a target from a reference file

  • From: Pascal de Bruijn <pmjdebruijn@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 26 Mar 2009 21:16:13 +0100

On Thu, Mar 26, 2009 at 9:01 PM, Pascal de Bruijn <pmjdebruijn@xxxxxxxxx> wrote:
> On Thu, Mar 26, 2009 at 6:56 PM, Lars Tore Gustavsen
> <lars.tore@xxxxxxxxxxxxxx> wrote:
>> On Thu, Mar 26, 2009 at 6:01 PM, Pascal de Bruijn <pmjdebruijn@xxxxxxxxx> 
>> wrote:
>>> On Thu, Mar 26, 2009 at 2:22 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
>>>>> Not exactly, preferably to RGB... Not all image editor can handle Lab.
>>>>> And I'd like to read back the RGB, to generate a newly (edited),
>>>>> reference file...
>>>> I thought that's what I outlined last time.
>>> I'm probably confusing terminology, which in turn is confusing you :)
>>> The point of the exercise would be to read back the edited image,
>>> as a new similar (but edited) reference file.
>>> 1. Convert R080505.txt into an image of an IT8 chart, with the patch colors
>>> generated from the text file.
>> I just had to play with this. Do you mean something like this:
>> sed   -n '17,304p' R080505.txt |awk '{print "convert -colorspace LAB
>> -size 118x94 \"xc:LAB("$5"%,"$6"%,"$7"%)\" " $1".png\n"}' > run.sh
>> Then you have to join them. I think there is a hint for that in the
>> url posted above. I have to play with the kids now..
> I was already fiddling with your scripts, adapting it. I attached my
> results. And
> scanin does recognize the image.
> Now I need to see if I can read back the image as a reference file, with
> (nearly) identical values. But that's something for tomorrow.

Scanning back isn't that hard. I've included that script as well.

However, for the conversion from the reference file, to the image, I have
no explicit color space defined. So that's probably why the read back
data it's matching the original data.

Pascal de Bruijn

Other related posts: