newbie fun with colors in CS help

LK
Posted By
Lazar_Keitelman
Jul 15, 2004
Views
338
Replies
3
Status
Closed
Hi,

Here is what I’m trying to do, can anyone help? I’m taking three identical pictures of a waterfall, I open all three in CS, keep only seperate R/G/B channels for each, convert each to greyscale, and then merge the three pictures together. The idea being is that anything static should now look normal and anything moving (falling water) should have a unique color, sometimes combining when overlapping, giving a rainbow effect. Doesn’t work. Anyone help a newbie?

Thanks

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L
LenHewitt
Jul 15, 2004
Having created your 3 greyscale images, convert them to multichannel mode. Open up one of the RGB images again and select Channels>Split channels.

Then Channels>Combine channels, but choose your 3 greyscale image channels to combine.
C
Califlefty
Jul 15, 2004
Thanks. I was following this until you state "open up one of the RGB images again…" well since I have the 3 original images open already, I made a copy of one to work with.

So after I split my "copy image" now I have 6 images om my desktop: image R
image G
image B
copy of image R
copy of image G
copy of image B
When I go to merge channels, I select mode RGB, however the only channels PS will let me select are the "copy" images, which if selected merge back to recompose my copy image, when I really want to select images R/B/G to build my composite. What am I missing here?
Thanks so much!
L
LenHewitt
Jul 15, 2004
If you split the channels on all 3 full-colour images, and then select merge-channels>RGB you should have 9 channels to select from for each new channel.

Lets say you start with pic1, pic2 and pic3. You split channels on each leaving you with:

pic1-R
pic1-G
pic1-B
pic2-R
pic2-G
pic2-B
pic3-R
pic3-G
pic3-B

Now select merge channels>RGB (3 channels) and choose from the drop-downs pic1-R for the red channel, pic2-G for the green and pic3-B for the blue channel

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Learn how to rescue details, remove flyaways, add volume, and enhance the definition of hair in any photo. We break down every tool and technique in Photoshop to get picture-perfect hair, every time.

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