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 Post Post subject: Removing whiteness from a JPEG compressed image
 
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Joined: Sun Oct 16, 2005 9:42 am
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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.

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Fri Apr 27, 2012 8:34 am 
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 Post Post subject: Re: Removing whiteness from a JPEG compressed image
 
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Joined: Sun Oct 16, 2005 9:42 am
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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

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Fri Apr 27, 2012 8:45 am 
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 Post Post subject: Re: Removing whiteness from a JPEG compressed image
 
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Nice congrats!

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Fri Apr 27, 2012 8:56 am 
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 Post Post subject: Re: Removing whiteness from a JPEG compressed image
 
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Malevolent Artificial Intelligence
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Colour to Alpha in the Gimp under the Colours menu can make the background transparent as well if you like.

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Fri Apr 27, 2012 10:59 am 
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 Post Post subject: Re: Removing whiteness from a JPEG compressed image
 
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Joined: Sun Oct 16, 2005 9:42 am
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Sorry, I did try colour to alpha, but it removed too much of the logo (the grey part was very transparent)

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Fri Apr 27, 2012 12:48 pm 
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 Post Post subject: Re: Removing whiteness from a JPEG compressed image
 
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Joined: Sun Oct 16, 2005 9:42 am
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Ended up making this.

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

Image

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Fri May 04, 2012 2:59 pm 
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