Channel Mixer and toning grayscale images
William Harvey
Gimp days. In creating grayscales I usually used the channel
mixer to create them since this gave me more control over
contrast.
I've been looking but haven't found an equivalent method in
Gimp. Is there a way to do this?
Also, a few days ago I found the color settings to create a
sepia toning on grayscales -- yes I know The Gimp has this
available using script-fu's. What about adding a selenium
tone? Does anyone know where would I find the settings for
these different tones. They were available in MicroGrahix so
I'm sure I can duplicate them if I can get the color info.
Thanks in advance.
William Harvey
wha...@aye.net
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6.2
mQCNAzfMR/4AAAEEAKia88kzCOmLjT6Y9BatSYetKW0T1RE/6AyQ+sXBLJyj0iHo
S1W0wPISDDjfYktIwqmtyJuuA7kE3mS9Y00EBrr0gviRmUYxeU6NTn6GpjFbVDGR
us2N7Nw7bl9u/DGIjZTGJu4RRt4u1frBZF/7ys1Brf2V67Uib+5/cNiTBB9lAAUR
tB9XaWxsaWFtIEhhcnZleTx3aGFydmV5QGF5ZS5uZXQ+
=ctlM
-----END PGP PUBLIC KEY BLOCK-----
Branko Collin
00:19:16 GMT:
>I use to use Micrographix's Picture Publisher in the before
>Gimp days. In creating grayscales I usually used the channel
>mixer to create them since this gave me more control over
>contrast.
>
>I've been looking but haven't found an equivalent method in
>Gimp. Is there a way to do this?
Again, the cavalry is called Grokking the GIMP. The relevant chapter
is at <http://gimp-savvy.com/BOOK/index.html?node54.html>. I do not
know if it offers the method you are used to, but it does explain the
different options GIMP gives you.
>Also, a few days ago I found the color settings to create a
>sepia toning on grayscales -- yes I know The Gimp has this
>available using script-fu's. What about adding a selenium
>tone? Does anyone know where would I find the settings for
>these different tones. They were available in MicroGrahix so
>I'm sure I can duplicate them if I can get the color info.
Sorry, can't help there.
--
branko collin
col...@xs4all.nl
Caera
color to tint with. Set the layer mode to Screen, Overlay, or Color.
Different modes give different results, play with it until you find the
right combination.
-Caera
"William Harvey" <wha...@aye.net> wrote in message
news:3bf6fd47...@news.aye.net...
<snip>
> Also, a few days ago I found the color settings to create a
> sepia toning on grayscales -- yes I know The Gimp has this
> available using script-fu's. What about adding a selenium
> tone? Does anyone know where would I find the settings for
> these different tones. They were available in MicroGrahix so
> I'm sure I can duplicate them if I can get the color info.
>
> Thanks in advance.
> William Harvey
> wha...@aye.net
<snip>
William Harvey
what I am looking to do. For instance, you can colorfy using
H=30/S=.25 and this will give you a pretty good sepia tone.
(R=0.72, G=0.43, B=0.29 Give a somewhat darker tone)
I would love to find the ones that would simulate a selenium
processed B&W print. I know it can be done because Picture
Publisher has the filter for that. Just doesn't show the
settings and I don't want to install the program for that
one feature plus the channel mixer.
On the channel mixer. I've looked at Groking the Gimp and it
is a great book. It shows the formula for creating
grayscales of 0.3R + 0.59G + 0.11B. This give a pretty good
grayscale but with a channel mixer I can change those
weightings on the fly to get the exact image I want with
very little burning and dodging.
I would think that as good as Gimp is there would be a way
to do this since even a fairly low end package like picture
publisher has it. I also think Paint Shop Pro does also.
William Harvey
Branko Collin
23:39:18 GMT:
>That would definitely tint the image but that isn't quite
>what I am looking to do. For instance, you can colorfy using
>H=30/S=.25 and this will give you a pretty good sepia tone.
>(R=0.72, G=0.43, B=0.29 Give a somewhat darker tone)
>I would love to find the ones that would simulate a selenium
>processed B&W print. I know it can be done because Picture
>Publisher has the filter for that. Just doesn't show the
>settings and I don't want to install the program for that
>one feature plus the channel mixer.
>
>On the channel mixer. I've looked at Groking the Gimp and it
>is a great book. It shows the formula for creating
>grayscales of 0.3R + 0.59G + 0.11B. This give a pretty good
>grayscale but with a channel mixer I can change those
>weightings on the fly to get the exact image I want with
>very little burning and dodging.
>
>I would think that as good as Gimp is there would be a way
>to do this since even a fairly low end package like picture
>publisher has it. I also think Paint Shop Pro does also.
My guess is that it is just a matter of looking around, finding the
method and writing a script for it.
What does Selenium do? From what I saw on the web, it yields pictures
with lots of black and white, but little grey, except in the
transitions.
(I am not a photographer or an artist, so please excuse me if I am
saying silly things.)
--
branko collin
col...@xs4all.nl
William Harvey
Collin) wrote:
>
>What does Selenium do? From what I saw on the web, it yields pictures
>with lots of black and white, but little grey, except in the
>transitions.
>
In traditional photography prints are often Selenium toned
to enhance archive durability. I like it because of the
increased contrast and deeper blacks. I can probably play
around with curves to get a similar image and that might be
just what Picture Publisher does behind the scenes.
After I figure out how to do it I might try writing a script
as you said. Need to learn to write those if I keep using
Gimp, and I see no reason not to. It would seem to be the
best this side of Photoshop and I can't afford that. I also
like the interface and looks of Gimp. At first I didn't like
having separate windows all over my screen. After I've grown
use to it I wouldn't want anything else in an image editor.
>(I am not a photographer or an artist, so please excuse me if I am
>saying silly things.)
>
Neither am I. One reason I can't afford photoshop. (If I was
I could do a tax deduction!)
>--
>branko collin
>col...@xs4all.nl