Crop borders

[CSharpCoder]

How do I crop an image at its center, so that it gives the image a certain size while only cutting the borders away (no scaling)? OR how do I give it borders that gives the image a certain total size?

The best I got right now is

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-crop 180x152

but it crops at the upper left corner, which is not what I want.

[snibgo]

"-crop" should usually have offsets for the top-left (or center etc) of the crop, eg:

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-crop 180x152+0+0
-crop 180x152+23+34

See http://www.imagemagick.org/script/comma ... s.php#crop

What version IM do you use? On what platform?

[CSharpCoder]

Solved it. Don't use crop.
extent was what I was looking for. Although you have to apply it to the center (-gravity center) and set the background as transparent (-background none)

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-background none -gravity center -extent 180x152