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Removing whiteness from a JPEG compressed image
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Author:  azcn2503 [ Fri Apr 27, 2012 8:34 am ]
Post subject:  Removing whiteness from a JPEG compressed image

So hey, I need some help.

I want to remove the white background from a logo and replace it with a black background. However, the logo is aliased and the JPEG compression really hurts it.

Here is the logo:
Image

Here is the A zoomed in to 800%:
Image

Here is the white background selected (threshold 15, aliasing selected, no feather):
Image

Here is after the white background is removed, and replaced with a black background:
Image

How do I make it blend without the white parts of the blue logo?

THANKS IN ADVANCE.

Author:  azcn2503 [ Fri Apr 27, 2012 8:45 am ]
Post subject:  Re: Removing whiteness from a JPEG compressed image

Hmm... Managed to do something by inverting the colours, duplicating the layer, inverting the colours on the new layer, and applying a layer filter.
Image

Author:  kyhas [ Fri Apr 27, 2012 8:56 am ]
Post subject:  Re: Removing whiteness from a JPEG compressed image

Nice congrats!

Author:  Lord Metritutus [ Fri Apr 27, 2012 10:59 am ]
Post subject:  Re: Removing whiteness from a JPEG compressed image

Colour to Alpha in the Gimp under the Colours menu can make the background transparent as well if you like.

Author:  azcn2503 [ Fri Apr 27, 2012 12:48 pm ]
Post subject:  Re: Removing whiteness from a JPEG compressed image

Sorry, I did try colour to alpha, but it removed too much of the logo (the grey part was very transparent)

Author:  azcn2503 [ Fri May 04, 2012 2:59 pm ]
Post subject:  Re: Removing whiteness from a JPEG compressed image

Ended up making this.

I think it's ok but it's not blue ;)

Image

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