On 2011-02-17 17:24, Suntot wrote:
>> On 02/17/2011 03:00 AM, Suntot wrote:
>>> >>  Well, I am new at this. Not even sure if what I am attempting is 
>>> >> possible. I am trying to change a specific color in an image. If I use 
>>> >> 'color selection' the edges don't change color. So I am trying to use 
>>> >> color to alpha... But, when I select by color, it seems to select all 
>>> >> similar color in the area, thus when I add a new layer it does the 
>>> >> change the color I wanted to change, but it also changes the rest of the 
>>> >> image with a similar color tone. What can I do to precisely select a 
>>> >> specific color or portion of an image with color to alpha?
>>> >>
>> >Color-to-alpha only applies to the selection, so you can restrict its
>> >effects by doing a selection first. For instance to remove a background,
>> >use the wand to get a rough selection of the background, grow the
>> >selection by  a couple of pixels so that it includes the edges of the
>> >foreground, and perform color-to-alpha.
> I tried doing a selection but since both colors are similar it selects all. 
> Changed selection thresholds and it still doesn't work. Here is what I am 
> trying to 
> change:http://www.weddingclipart.com/wca/edittemplate.do?template=218069
> I am trying to change the colors of the scrolls on the wedding invitation. 
> The dark blue into a red, the lighter into a black. Yet I can't seem to get 
> it to work flawlessly. Please help. thanks
I got pretty good results by first selecting white, cutting that, 
pasting to a new layer, then selecting the light-blue, cutting that and 
pasting to a new layer and finally selecting dark-blue, cutting and 
pasting to new layer.
see http://screencast.com/t/jb44OAkIOywh

It could probably be done with fewer layers than I used ....
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