Günter Bachelier wrote
| With the -extract widthxheight{{+-}offset}]
| expression the selection of a rectangle is possible
| but what about other polygons?
|
[EMAIL PROTECTED] on wrote...
| > a week ago I asked about a polygon selection tool
|
| ImageMagick 6.2.9-3 has the -clip-mask option. Use any image as a mask,
| however, an SVG image to define a polygon makes the most sense.
The -extract option is a special read image operator setting that cuts
down images that are being read in. It isn't really a mask or clip-path
as such. It is almost (but more efficient) equivalent to reading the
image and then applying a -crop to the image in memory.
-region, -clip-mask, and -lasso (or whatever it ends up being called)
are clip-paths that limit what parts of an image an operator is being
applied to.
Currently I only have a limited example of -region in IM Examples, in
"Distorting Images"
http://www.cit.gu.edu.au/~anthony/graphics/imagick6/distorts/#region
This example is however completely inadequate to describe these limiting
options.
I do plan to work on a section on these parts, but I have no idea where
it should be placed in IM Examples.
Just when I think I have explored most aspects of IM, new surprises pop up
;-) It is an amazing image processing package.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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Zatheris is, used to being beast of burden to other peoples needs.
Very sad life. Probably a very sad death. At least there is symmetry!
-- Zatheris, 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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