RGB Channel help!

L
Posted By
lawdoggy
May 29, 2005
Views
535
Replies
4
Status
Closed
I’m trying to figure out how to turn a single channel (i.e. green, blue, or red into my main picture without going back to RGB). Here is what i’m doing: i select a channel, lets say green. I apply levels and find edges to this channel only. i then apply some filters and get the channel just how i want it. now how do i get this channel to be my main channel and not go back to all three channel put together? i hope this makes sense. I want a black and white image and have it with the green channel only, but when i click back in the layers menu on the background it automatically goes to color?

i tried deleting all the other channels individually but then i could not save the file as a jpeg. any help would be greatly appreciated!!

thanks…mitch
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Tacit
May 29, 2005
In article ,
"lawdoggy" wrote:

i tried deleting all the other channels individually but then i could not save the file as a jpeg. any help would be greatly appreciated!!

You did the right thing. You delete the other channels. Then go to Image->Mode. It will say "Multichannel." Select Grayscale and you can save it as a JPEG.

Are you sure you want to save as JPEG, though? Unless you plan to put the image on the Web, saving in some other format is better. JPEG degrades the quality of the image.

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E
edjh
May 29, 2005
tacit wrote:
In article ,
"lawdoggy" wrote:

i tried deleting all the other channels individually but then i could not save the file as a jpeg. any help would be greatly appreciated!!

You did the right thing. You delete the other channels. Then go to Image->Mode. It will say "Multichannel." Select Grayscale and you can save it as a JPEG.

Are you sure you want to save as JPEG, though? Unless you plan to put the image on the Web, saving in some other format is better. JPEG degrades the quality of the image.
Another way: Select All, Copy, Paste. This will put your grayscale channel image on another layer. Save as jpg (it will still be RGB. If that matters to you, change mode to grayscale)

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L
lawdoggy
May 30, 2005
Thank you!
O
Odysseus
May 31, 2005
In article <fihme.7939$>,
edjh wrote:

tacit wrote:

<snip>
You did the right thing. You delete the other channels. Then go to Image->Mode. It will say "Multichannel." Select Grayscale and you can save it as a JPEG.
<snip>
Another way: Select All, Copy, Paste. This will put your grayscale channel image on another layer. Save as jpg (it will still be RGB. If that matters to you, change mode to grayscale)

One more (my favourite): from the Channels palette, Duplicate Channel, choosing a New document for it in the dialog that then comes up.

—
Odysseus

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