Computer Graphics with Photoshop - Need to split image into multiple colors

Author

Need to split image into multiple colors

RavennaB

2007-01-27, 10:17 pm

I have an image that I need to split into multiple color channels--not
just RGB, CMYK, or HSL.

I believe this is possible because I have a sample image to which this
has been done---an original full color image, and then 12 different
greyscale images that, individually contain the info for all the diff
colors in the image. (Obviously done by someone else, unknown to me---I

rec'd it as a sample for what needs to be done to my design.)

Can anyone advise me on this or point me to a tutorial? I've looked
everywhere.

Thanks so much!

Johan W. Elzenga

2007-01-27, 10:17 pm

RavennaB <dottie@nebnet.net> wrote:

> I have an image that I need to split into multiple color channels--not
> just RGB, CMYK, or HSL.
>
> I believe this is possible because I have a sample image to which this
> has been done---an original full color image, and then 12 different
> greyscale images that, individually contain the info for all the diff
> colors in the image. (Obviously done by someone else, unknown to me---I
>
> rec'd it as a sample for what needs to be done to my design.)
>
>
> Can anyone advise me on this or point me to a tutorial? I've looked
> everywhere.
>
>
> Thanks so much!

You could select a color range, and then use 'Save Selection' to save
this as a new channel. You can do this as many times as you want, so you
can create as many new channels as you want. Then, as a final step, you
can delete the three color channels.

--
Johan W. Elzenga johan<<at>>johanfoto.nl
Editor / Photographer http://www.johanfoto.com

2007-01-27, 10:17 pm

Take Help Separations.

You can save an image of each color of the CMYK and other spaces.

RavennaB

2007-01-27, 10:17 pm

Thank you to Johan and JJ for the excellent feedback. Looks like
something even I may be able to do and I'm anxious to try it.

Appreciate the time you took to share your expertise. ---Ravenna
======================================================

Johan W. Elzenga wrote:
> RavennaB <dottie@nebnet.net> wrote:
>
>
> You could select a color range, and then use 'Save Selection' to save
> this as a new channel. You can do this as many times as you want, so you
> can create as many new channels as you want. Then, as a final step, you
> can delete the three color channels.
>
>
> --
> Johan W. Elzenga johan<<at>>johanfoto.nl
> Editor / Photographer http://www.johanfoto.com

Arnor Baldvinsson

2007-01-27, 10:17 pm

Hi,

This is very easy to do:) You can read about this in the help for
"Channels" then navigate to "splitting into separate images".
1. Open your image
2. Select "Image | Duplicate" from the main menu in Photoshop
3. Select "Layer | Flatten Image" from the menu
4. Select "Window | Channel" from the menu
5. Click on the little arrow button at the top of the Channel palette to
open the Channels palette menu.
6. Select "Split Channels"

That's it!:)

In order to do this for RGB, select "Image | Mode | RGB Color" from the main
menu after step 3

For CMYK select "Image | Mode | CMYK" after step 3

For LAB select "Image | Mode | Lab color" after step 3

This makes it very easy to split the images.

Alternatively, if you just want a single channel, then you can select the
channel in the channel palette, press Ctrl-A to select the image, then press
Ctrl-C to copy it to the clipboard and then select "File | New" from the
menu, click OK and then click Ctrl-V to paste the channel image into the new
image. This way you can easily build up a B&W image of your photo and then
set the strengths for each color channel individually.

Hope this helps:)
--
Arnor Baldvinsson
San Antonio, Texas

John

2007-01-27, 10:17 pm

"Arnor Baldvinsson" <photong@icetips.com> wrote in message
news:WPXqh.23610$sR.11420@newssvr29.news.prodigy.net...
> Hi,
>
> This is very easy to do:) You can read about this in the help for
> "Channels" then navigate to "splitting into separate images".
> 1. Open your image
> 2. Select "Image | Duplicate" from the main menu in Photoshop
> 3. Select "Layer | Flatten Image" from the menu
> 4. Select "Window | Channel" from the menu
> 5. Click on the little arrow button at the top of the Channel palette to
> open the Channels palette menu.
> 6. Select "Split Channels"

Yu da Man, Arnor!