On Sunday 25 April 2004 03:02 am, Ken Walker wrote:

I was asked the other day if I could change the dark brown trim on our house including down spouts and eavestroughs but not the roof as shown in

http://qblaw.ca/house.jpg

from dark brown to Montana Tan as shown in

http://qblaw.ca/paint.jpg

Doors would be Autumn haze.

I thought this would be a great exercise in learning to use The Gimp but I have become lost in selection modes, layers, channels and the like reading Grokking the Gimp and the regular docs. I have tried to use google to find something appropriate to help me with this, but can't come up with the magic search words to get me there.

Could someone point me to some resource that will walk me through this task and/or give me a bit of an outline of which tools I should use to get where I want to go.

And while you are looking at these images, what do you think of the colour choice? They aren't my choices and I have no idea about these things.

Hi Ken,

While you're waiting for an authoritative answer I'll give you what I know. I'd use the bezier selection tool to select the trim, eavesdrops and spouts, but not the roof, trees, etc. Then I'd Rightclick->select->bycolor, click the "intersection radio button, use a threshold somewhere in the 10-25 area, and click a portion of the drawing, inside the selections, that has one of the lighter parts of dark brown. This will select all sorts of stuff. Then I'd make the foreground color a lighter shade of montana tan, and Rightclick->Edit->fillWithForegroundColor. I'd repeat the same thing for a slightly darker part of dark brown, replacing with a slightly darker montana tan, and so on til all the dark brown on eaves, spouts and trim are replaced by montana tan.

My method will eliminate quite a bit of texture. I'm sure some of the other people on the list will come up with ways to replace all the brown at once, texture and all, and I'll anxiously await that information. But if worst comes to worst, you can do what I just said -- I've done it often.

By the way -- I use select by color a lot when I scan yellow receipts. I use select by color to turn the yellow to white, then save it as grayscale and save mucho megabytes.

SteveT

Steve Litt Founder and acting president: GoLUG
http://www.golug.org

Hi,

Steve Litt writes:

While you're waiting for an authoritative answer I'll give you what I know. I'd use the bezier selection tool to select the trim, eavesdrops and spouts, but not the roof, trees, etc.

That's a good start. You can then for example use "Filters->Colors->Map->Colormap Rotation" to shift the hue of brownish colors to a different color.

By the way -- I use select by color a lot when I scan yellow receipts. I use select by color to turn the yellow to white, then save it as grayscale and save mucho megabytes.

The classic method to make the paper on a scan to appear as white is to use the Levels tool. Use the white-point color picker and click on an empty spot of the scan. Or, even better, define the white-point before doing the actual scan. Most scan software (including XSane) supports this operation.

Sven

Hi Ken,

Ken Walker wrote:

I was asked the other day if I could change the dark brown trim on our house including down spouts and eavestroughs but not the roof as shown in from dark brown to Montana Tan as shown in

First use something like the freehand selection tool to roughly select the eaves (that is, if you add in stuff outside, don't worry about it).

Then copy this selection and paste it as a new layer.

Then use the colormap rotation plug-in (in Filters->Color->Map) to map the dark brown to a lighter brown.

And if anything outside the eaves unintentionally got its colour changed, you can use the eraser tool (with a small brush) to get back to the original colour.

Cheers, Dave.

On Sunday 25 April 2004 03:02 am, Ken Walker wrote:

I was asked the other day if I could change the dark brown trim on our house including down spouts and eavestroughs but not the roof as shown in

http://qblaw.ca/house.jpg

Ken -- I use the dxm theme for IceWM. It's primarily dark green with subdued greens and yellows. Your house photo makes the ideal background for this theme.

Thanks

SteveT

Steve Litt Founder and acting president: GoLUG
http://www.golug.org