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How to change the color for a logo that has pixels with varying degrees of opacity?

Jul 26, 2011, 02:36
Post: #1
How to change the color for a logo that has pixels with varying degrees of opacity?
Greetings;

Can somebody tell me how to go about changing the color in the image below from green to brown?
   

I can select the pixels that are the same shade of green by using the "Select by Color" tool. Then use the fill tool to fill the selected pixels with brown. I can do that for each shade of green.

But the problem is the lighter shades of green have a lesser opacity. I would have to guess the level of opacity for the fill tool when filling with the color brown.

Is there some way that GIMP can match the opacity exactly for the green pixels so that when I fill with the color brown it will have the same opacity as the green pixel?

Thanks.
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Jul 26, 2011, 06:01
Post: #2
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
well if im correct you could just...
color select all by just holding shift and clicking on the various shades of green
when you have the whole selection ...selected...make a new layer above and then fill, and then you can change the opacity of coarse to whatever you want and add a background layer behind it. hope this helps. G.L.

[Image: MMSSig-2.png]
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Jul 29, 2011, 12:54
Post: #3
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
Ofnuts;

Thanks for responding to my question. There is lots of good information there.

I have went through the process that you have described. I am down to the point where it says "Select a foreground color, and bucket-fill the layer."

I can't get it to bucket fill the entire image with one click. I am having to click each pixel or grouping of pixels in order to get them to bucket fill.

Here's what I have got so far.
   
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Jul 29, 2011, 14:18
Post: #4
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
Wow! Neat. Thank you for the help.

I had to set the bucket fill tool to "Fill whole selection."

   

   

Thanks again for the help.
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Feb 21, 2012, 16:11 (This post was last modified: Feb 21, 2012 16:19 by JimTrail.)
Post: #5
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
Ofnuts;

I am still having trouble getting the image to look clear and crisp (like the one you did).

I have got another customer that has a logo that they want me to put on a business cards. I scanned the image. Then I went through the steps you described.

The re-worked image looks better than the scanned one - but it is still not clear and crisp like the logo you worked on.

The colors green and blue vary. Some of the pixels are slightly lighter. All of the pixels are not uniform.

Do you have any more suggestions about how I might sharpen up the image?

Thanks.

Image with steps applied to it.
   

Original scanned image.
   
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Feb 21, 2012, 17:27
Post: #6
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
im sorry i dont have time to do it but it looks like a simple one to re trace, i did the sky and the top of the mountains in like 10 mins. good luck.

[Image: MMSSig-2.png]
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Feb 21, 2012, 18:28
Post: #7
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
everyone and inkscape lately, i gottah get on this i guess. Smile

[Image: MMSSig-2.png]
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Feb 22, 2012, 03:01
Post: #8
RE: How to change the color for a logo that has pixels with varying degrees of opacity?
(Feb 22, 2012 01:50)ofnuts Wrote:  This said, even with Gimp, a quick hack:



I'd recommend you straighten up the logo, which is a bit tilted on the left, before doing the path.

Ofnuts;

Thank you so much. That looks great!

JT Smile
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