* colorizing pictures
@ 2019-03-18 18:45 Henning Hraban Ramm
2019-03-19 12:23 ` Hans Hagen
0 siblings, 1 reply; 6+ messages in thread
From: Henning Hraban Ramm @ 2019-03-18 18:45 UTC (permalink / raw)
To: mailing list for ConTeXt users
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\externalfigure has a "color" parameter. It used to be possible to colorize greyscale pictures with that, but it doesn’t work any more:
%%%
\setupcolors[state=start]
\setupexternalfigures[
location={local,global,default},
]
\starttext
\externalfigure[img/minidodo_g][width=.3\textwidth,color=red] % greyscale
\externalfigure[img/minidodo_b][width=.3\textwidth,color=green] % bitmap
\externalfigure[cow][width=.3\textwidth,color=blue] % vector
\stoptext
%%%
Greetlings, Hraban
---
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: colorizing pictures
2019-03-18 18:45 colorizing pictures Henning Hraban Ramm
@ 2019-03-19 12:23 ` Hans Hagen
2019-03-19 15:23 ` Henning Hraban Ramm
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen @ 2019-03-19 12:23 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 3/18/2019 7:45 PM, Henning Hraban Ramm wrote:
> \externalfigure has a "color" parameter. It used to be possible to
> colorize greyscale pictures with that, but it doesn’t work any more:
>
> %%%
> \setupcolors[state=start]
> \setupexternalfigures[
> location={local,global,default},
> ]
>
> \starttext
>
> \externalfigure[img/minidodo_g][width=.3\textwidth,color=red] % greyscale
> \externalfigure[img/minidodo_b][width=.3\textwidth,color=green] % bitmap
> \externalfigure[cow][width=.3\textwidth,color=blue] % vector
>
> \stoptext
from one of the manuals ...
\starttext
\definecolor [my-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m
\definecolor [my-yellow] [c=0,m=.28,y=1,k=.06] % pms 124 uncoated m
\definespotcolor [my-blue-100] [my-blue] [p=1]
\definespotcolor [my-yellow-100] [my-yellow] [p=1]
\definespotcolor [my-blue-50] [my-blue] [p=.5]
\definespotcolor [my-yellow-50] [my-yellow] [p=.5]
\definemultitonecolor [my-mix] [my-blue=.12,my-yellow=.28]
[c=.1,m=.1,y=.3,k=.1]
\starttabulate[|T||]
\NC my-blue \NC \blackrule[color=my-blue,
width=.6\textwidth,height=5mm] \NC \NR
\NC my-blue-50 \NC \blackrule[color=my-blue-50,
width=.6\textwidth,height=5mm] \NC \NR
\NC my-blue-100 \NC \blackrule[color=my-blue-100,
width=.6\textwidth,height=5mm] \NC \NR
\NC my-yellow \NC \blackrule[color=my-yellow,
width=.6\textwidth,height=5mm] \NC \NR
\NC my-yellow-50 \NC \blackrule[color=my-yellow-50,
width=.6\textwidth,height=5mm] \NC \NR
\NC my-yellow-100 \NC
\blackrule[color=my-yellow-100,width=.6\textwidth,height=5mm] \NC \NR
\NC my-mix \NC \blackrule[color=my-mix,
width=.6\textwidth,height=5mm] \NC \NR
\stoptabulate
\useexternalfigure[demofig][mill.png][object=no,width=.2\textwidth]
\startcombination[4*1]
{\externalfigure[demofig]} {no color}
{\externalfigure[demofig][color=my-mix]} {indexed duotone}
{\externalfigure[demofig][color=my-blue-100]} {spot color}
{\externalfigure[demofig][color=my-yellow-100]} {spot color}
\stopcombination
\stoptext
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: colorizing pictures
2019-03-19 12:23 ` Hans Hagen
@ 2019-03-19 15:23 ` Henning Hraban Ramm
2019-03-19 15:34 ` Hans Hagen
0 siblings, 1 reply; 6+ messages in thread
From: Henning Hraban Ramm @ 2019-03-19 15:23 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 2019-03-19 um 13:23 schrieb Hans Hagen <j.hagen@xs4all.nl>:
> On 3/18/2019 7:45 PM, Henning Hraban Ramm wrote:
> from one of the manuals ...
>
> \starttext
>
> \definecolor [my-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m
> \definecolor [my-yellow] [c=0,m=.28,y=1,k=.06] % pms 124 uncoated m
>
> \definespotcolor [my-blue-100] [my-blue] [p=1]
> \definespotcolor [my-yellow-100] [my-yellow] [p=1]
> \definespotcolor [my-blue-50] [my-blue] [p=.5]
> \definespotcolor [my-yellow-50] [my-yellow] [p=.5]
>
> \definemultitonecolor [my-mix] [my-blue=.12,my-yellow=.28] [c=.1,m=.1,y=.3,k=.1]
So it works only with toned or multitone colors and only with _some_ greyscale pictures, not with bitmaps and also not with my greyscale dodo.
I can also only use one version my-blue – if I use my-blue-100, then my-blue-50 stays grey, and if I only use my-blue-50, it’s the same tone as 100.
Something’s very fishy.
\setupexternalfigures[
location={local,global,default},
]
\definecolor [my-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m
\definecolor [your-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m
\definecolor [my-yellow] [c=0,m=.28,y=1,k=.06] % pms 124 uncoated m
\definespotcolor [my-blue-100] [my-blue] [p=1]
\definespotcolor [my-yellow-100] [my-yellow] [p=1]
\definespotcolor [my-blue-50] [my-blue] [p=.5]
\definespotcolor [my-yellow-50] [my-yellow] [p=.5]
\definespotcolor [your-blue-100] [your-blue] [p=1]
\definemultitonecolor [my-mix] [my-blue=.12,my-yellow=.28] [c=.1,m=.1,y=.3,k=.1]
\useexternalfigure[milli][mill.png][object=no,width=.3\textwidth]
\useexternalfigure[dodog][img/dodo_g.png][object=no,width=.3\textwidth]
\useexternalfigure[dodob][img/dodo_1bit.png][object=no,width=.3\textwidth]
\useexternalfigure[cowi][cow.pdf][object=no,width=.3\textwidth]
\define[1]\FIG{%
\section{#1}
\startcombination[3*1]
{\externalfigure[milli][color=#1]} {grey}
{\externalfigure[dodog][color=#1]} {grey}
{\externalfigure[dodob][color=#1]} {bitmap}
\stopcombination
}
\starttext
%\FIG{blue}
%\FIG{my-blue}
%\FIG{my-blue-100}
%\FIG{my-blue-50}
%\FIG{my-mix}
\FIG{my-blue-50}
\FIG{your-blue-100}
\FIG{my-mix}
\stoptext
Greetlings, Hraban
---
https://www.fiee.net
http://wiki.contextgarden.net
https://www.dreiviertelhaus.de
GPG Key ID 1C9B22FD
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: colorizing pictures
2019-03-19 15:23 ` Henning Hraban Ramm
@ 2019-03-19 15:34 ` Hans Hagen
2019-03-19 17:54 ` Henning Hraban Ramm
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen @ 2019-03-19 15:34 UTC (permalink / raw)
To: mailing list for ConTeXt users, Henning Hraban Ramm
On 3/19/2019 4:23 PM, Henning Hraban Ramm wrote:
> Am 2019-03-19 um 13:23 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>
>> On 3/18/2019 7:45 PM, Henning Hraban Ramm wrote:
>> from one of the manuals ...
>>
>> \starttext
>>
>> \definecolor [my-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m
>> \definecolor [my-yellow] [c=0,m=.28,y=1,k=.06] % pms 124 uncoated m
>>
>> \definespotcolor [my-blue-100] [my-blue] [p=1]
>> \definespotcolor [my-yellow-100] [my-yellow] [p=1]
>> \definespotcolor [my-blue-50] [my-blue] [p=.5]
>> \definespotcolor [my-yellow-50] [my-yellow] [p=.5]
>>
>> \definemultitonecolor [my-mix] [my-blue=.12,my-yellow=.28] [c=.1,m=.1,y=.3,k=.1]
>
> So it works only with toned or multitone colors and only with _some_ greyscale pictures, not with bitmaps and also not with my greyscale dodo.
It uses an indexed (256 so one byte) image ... coloring a cow is no
option anyway as there the pdf object is an independent thing (i coul
dprobably inject color directives if needed but that could then
interfere with the way such a pdf stream is set up.
> I can also only use one version my-blue – if I use my-blue-100, then my-blue-50 stays grey, and if I only use my-blue-50, it’s the same tone as 100.
>
> Something’s very fishy.
Could be but it's actually more a gimmick as we can't really mess to
much with the internals of images (they can have masks, palettes, etc etc).
Later this year there might be other tricks on our sleeves but I'm not
going to touch the code now.
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: colorizing pictures
2019-03-19 15:34 ` Hans Hagen
@ 2019-03-19 17:54 ` Henning Hraban Ramm
2019-03-19 22:23 ` Hans Hagen
0 siblings, 1 reply; 6+ messages in thread
From: Henning Hraban Ramm @ 2019-03-19 17:54 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 2019-03-19 um 16:34 schrieb Hans Hagen <j.hagen@xs4all.nl>:
> On 3/19/2019 4:23 PM, Henning Hraban Ramm wrote:
>> Am 2019-03-19 um 13:23 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>>> On 3/18/2019 7:45 PM, Henning Hraban Ramm wrote:
>>> from one of the manuals ...
>>>
>>> \starttext
>>>
>>> \definecolor [my-blue] [c=1,m=.38,y=0,k=.64] % pms 2965 uncoated m
>>> \definecolor [my-yellow] [c=0,m=.28,y=1,k=.06] % pms 124 uncoated m
>>>
>>> \definespotcolor [my-blue-100] [my-blue] [p=1]
>>> \definespotcolor [my-yellow-100] [my-yellow] [p=1]
>>> \definespotcolor [my-blue-50] [my-blue] [p=.5]
>>> \definespotcolor [my-yellow-50] [my-yellow] [p=.5]
>>>
>>> \definemultitonecolor [my-mix] [my-blue=.12,my-yellow=.28] [c=.1,m=.1,y=.3,k=.1]
>> So it works only with toned or multitone colors and only with _some_ greyscale pictures, not with bitmaps and also not with my greyscale dodo.
>
> It uses an indexed (256 so one byte) image ... coloring a cow is no option anyway as there the pdf object is an independent thing (i could probably inject color directives if needed but that could then interfere with the way such a pdf stream is set up.
I didn’t expect PDF to work (I remember colored cows, but those were probably MP), and I must analyze why your greyscale PNG works and not mine.
>> I can also only use one version my-blue – if I use my-blue-100, then my-blue-50 stays grey, and if I only use my-blue-50, it’s the same tone as 100.
>> Something’s very fishy.
> Could be but it's actually more a gimmick as we can't really mess to much with the internals of images (they can have masks, palettes, etc etc).
Understood. But colorizing grey pictures is a nice feature that I’m used to use in InDesign (and in QuarkXPress earlier).
> Later this year there might be other tricks on our sleeves but I'm not going to touch the code now.
I’m looking forward to those.
Since I’m working at my ConTeXt book again, I’m researching which parameters and features actually work and how. This looks like a case that I won’t include in the book but only document in the wiki.
Greetlings, Hraban
---
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: colorizing pictures
2019-03-19 17:54 ` Henning Hraban Ramm
@ 2019-03-19 22:23 ` Hans Hagen
0 siblings, 0 replies; 6+ messages in thread
From: Hans Hagen @ 2019-03-19 22:23 UTC (permalink / raw)
To: mailing list for ConTeXt users
On 3/19/2019 6:54 PM, Henning Hraban Ramm wrote:
> Since I’m working at my ConTeXt book again, I’m researching which parameters and features actually work and how. This looks like a case that I won’t include in the book but only document in the wiki.
we can make it a topic for the ctx meeting ... to what extend do we want
to mess runtime with such graphic details and what conditions do we then
impose on the original
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________
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2019-03-18 18:45 colorizing pictures Henning Hraban Ramm
2019-03-19 12:23 ` Hans Hagen
2019-03-19 15:23 ` Henning Hraban Ramm
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2019-03-19 17:54 ` Henning Hraban Ramm
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