Can't figure out how to do something in CS3

Dogdots

I have a picture I want to make black and white, but leave the green showing thru the window. How do I do that?

jjbong

A bit vague, but if I understand correctly you want a black and white
with the exception of a window, which you either want unmodified
or enhanced somehow with green.

I assume you're in RGB. To do this you create a black and white layer
(R, G, and B channels all the same) with an unmodified layer (or an
enhanced one) on top of it. Use a layer mask on the top layer to
show only the window.

A simple way to make the B/W layer is to find a channel that makes
a decent B/W image (G is usually a good choice). Duplicate the
original layer, and use Apply Image to put the G channel of the
original layer into the R and B channels of the top layer. Now
the top layer will have R, G, and B the same (so neutral), each
of them the G channel of the original image. You can exend this
technique to mix various proportions of R, G, and B to get
a better B/W.

You can now duplicate the original layer and place it on top, then
work on the layer mask.

How you get the layer mask depends greatly on the picture. Katrin
Eisman's book is a good reference.

Dogdots

Sorry I was somewhat vague. Vague discribes my ability in CS3. I should be able to figure out the instructions you game me.

Yes, I'm in RGB. And it is a picture of an old house that is somewhat dark in the middle of the field. The door is missing and thru that door you can see the back door with the green trees shinning through the missing window. Thought I would like to keep the green of the trees.

Thanks!

BradfordBenn

I took an online class, not saying that this forum isn't great but I took one through IUSB/ed2go. There are also some cool Podcasts from Adobe Creative Suite (http://creativesuitepodcast.com/) these are video podcasts. It helped me think about the process of working with the software and get an idea what is possible in the software.

Dogdots

Sounds like something I need--thanks for the link