Rodrigo Cunha on wrote...
| Hi!
|
| I was trying to simulate chromatic aberration using the
following command:
|
| convert -channel Red -affine 0.9,0,0,0.9,0,0 -transform
-channel Blue
| -affine 1.1,0,0,1.1,0,0 -transform +channel -resize
800x600 -quality 90
| -sampling-factor 1x1 input.jpg output.jpg
|
| The idea being that by scaling each channel separately
(and not scaling
| green) I could emulate (or correct a lens) chromatic
aberration.
|
| The results are nil thought... what's wrong with my
command?
I do not think -affine understands -channel settings. would
be
supprised if it did as it does interpolation of colors to
generate new
pixels that would in the old image fall between pixels.
I think you would be better off separating each RGB channel
(using
-separate) adjusting the size of the images, and cropping
them so they
are all the same size, then -combine them back together
again.
See Channels
http://www.cit.gu.edu.au/~anthony/graphics/imagick6
/channels/
Anthony Thyssen ( System Programmer ) <A.Thyssen griffith.edu.au>
-----------------------------------------------------------
------------------
No one ever listens to Zatheris. "Quite
Mad!", thay say. It is good
the Zatheris does not mind. He has even grown to like
it. Oh yes!
-- Zatheris's Mumbling, Bablyon 5,
"War Without End"
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------------------
Anthony's Home is his Castle http://www.cit.gu.
edu.au/~anthony/
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