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Image Feathering

Posted: 2007-10-25T08:34:02-07:00
by johnford
Hi All,

Does anyone know how I can feather the edges of an image?

Regards,

John.

Re: Image Feathering

Posted: 2007-10-29T15:13:09-07:00
by Bonzo
Depending what you want to do I remember Anthony said about using a gradiant to blend two pictures along one edge.

This is a link to a masking method I tried out - http://www.rubblewebs.co.uk/imagemagick ... r_soft.jpg

Re: Image Feathering

Posted: 2007-10-30T19:18:58-07:00
by anthony
Or is it you want to make the edges of an image slightly transparent, or overlaying a masked image into another image?

Feathering in this case is usually done as part of the cutting process and not as a later step.

Re: Image Feathering

Posted: 2007-11-01T08:57:29-07:00
by johnford
Hi,

Im trying to feather white all around an image.

Is this possible to do without using another image?

John.

Re: Image Feathering

Posted: 2007-11-01T16:35:27-07:00
by anthony
Pardon, feather all white?

You mean you have a image that is sitting on a white background, and you want to remove that background while preserving the anti-aliasing involved.

This is a real problem for which no ideal solution is currently available. That is not to say a solution could not be found, just not a simple solution.

What I do have has been placed online at
http://imagemagick.org/Usage/channels/#mask_creation

One other solution by Dr. Rick Mabry,
http://www.lsus.edu/sc/math/rmabry/imag ... tireplace/
This basically is a gradient to gradient color replacement technique.
Such a technique with masking and overlaying will correctly re-create the right anti-aliased edging of a image. Or as you incorrectly put it 'feathering'.

Fortunately this technique is NOT available in IM, as basically we don't have enough programmers willing to work on the software core. :(

However if you like to publish a link to an example image I'll see what I can do about generating a example using IM techniques.