[magick-users] Resizing to minimum res and filter question
David Di Biase
dave.dibiase at gmail.com
Mon Mar 30 16:49:34 PDT 2009
So apparently I am indeed on an older version.
Version: ImageMagick 6.2.4 09/16/06 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2005 ImageMagick Studio LLC
Crap.
I'm going to come up with a way to manually calculate it...
:-/
On Mon, Mar 30, 2009 at 12:37 AM, Anthony Thyssen <A.Thyssen at griffith.edu.au
> wrote:
> On Sun, 29 Mar 2009 14:48:53 -0700
> Fred Weinhaus <fmw at alink.net> wrote:
>
> |
> | I believe the documentation is in error! The ''<", is supposed to
> | work if you want to expand an image, not reduce it, to my knowledge.
> |
> |
> |
> | The docs says:
> |
> | widthxheight<
> | Change dimensions only if both specified dimensions exceed image
> dimensions.
> |
> | but should say
> | widthxheight<
> | Change dimensions only if both specified dimensions DO NOT exceed
> | image dimensions.
> |
> >From IM examples, Resize and Scaling
> http://www.imagemagick.org/Usage/resize/
> Only Shrink Larger ('>')
> Only Enlarge Smaller ('<')
>
> You want '>' not '<'
>
> | Lanczos is probably best for minimizing. Anthony believes Mitchell is
> | better for maximizing.
> |
> These are also the defaults. unless the image contains transparency where
> Lanczos then falls back to Mitchell again to avoid VERY BAD ringing effects
> for the alpha channel with undefined colors.
>
> I would also say, and I repeated myself many times in the above document.
> Go with the defaults, unless you understand what you are doing,
> OR trying to achieve weird effects (such as heavy blurring while enlarging
> small colored gradient generating images)
>
> Anthony Thyssen ( System Programmer ) <A.Thyssen at griffith.edu.au>
>
> -----------------------------------------------------------------------------
> Are you a devious, plotting, unreliable madman?
> Ah, good, then you can be my most trusted minister.
> -- Terry Pratchett, "Interesting Times"
>
> -----------------------------------------------------------------------------
> Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/<http://www.cit.gu.edu.au/%7Eanthony/>
>
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