Re: Transparent Background

From: Carl Schreck <carl_at_nyahnyahspammersnyahnyah>
Date: Wed Mar 28 2012 - 13:03:23 MDT

Daran,

That's a good suggestion. In previous versions of NCL, the support for png
was very minimal. The image quality wasn't nearly as good as I get from
convert. Maybe it's better now, I'll give it a try... What do I pass that
res to?

    Carl

On Wed, Mar 28, 2012 at 2:20 PM, Daran L. Rife <drife@ucar.edu> wrote:

> Hi Carl,
>
> Perhaps this is a silly question, but have you considered using the
> PNG workstation within NCL, rather than EPS? Seems like you could
> remove the additional ImageMagick conversion (EPS => PNG) if you simply
> change your NCL workstation to PNG. Something like this:
>
> res@wkFormat = "newpng"
>
>
> Daran
>
> --
>
> Date: Wed, 28 Mar 2012 12:08:15 -0400
> From: Carl Schreck <carl@cicsnc.org>
> Subject: Transparent Background
> To: ncl-talk <ncl-talk@ucar.edu>
> Message-ID:
> <CANGuUDG-YY3wGRXcmwSguHXZ3JATQ-qdQiEic5FGD03XCNMfPA@mail.gmail.com
> >
> Content-Type: text/plain; charset="iso-8859-1"
>
> I recently had to upgrade imageMagick to the latest version, and I've been
> having some strange results converting NCL-made eps files to png. See the
> attached file. It looks almost ok, but the background is transparent
> instead of white. It doesn't show up in this example, but if I had done
> shaded contours, that shading would be white. Anything outside of the plot
> would still be transparent though.
>
> This could probably be addressed on either the NCL side or the imageMagick
> side, but I'm stumped on both sides. Any suggestions?
>
> I am using imageMagick 6.7.6 and NCL 6.0.0. I do the conversion as "convert
> -trim +repage -density 150 genesis.eps genesis.png"
>
> My .hluresfile has these lines:
> ! White background/black foreground
> *wkForegroundColor : (/0.,0.,0./)
> *wkBackgroundColor : (/1.,1.,1./)
>
> Thanks!
> Carl
>
> --
> Carl J. Schreck III, PhD
> Postdoctoral Research Associate
> Cooperative Institute for Climate and Satellites (CICS-NC)
> North Carolina State University and NOAA's National Climatic Data Center
> 151 Patton Avenue
> Asheville, NC 28801
> Tel: 828-257-3140
> carl@cicsnc.org
> http://monitor.cicsnc.org/mjo/
> http://www.atmos.albany.edu/student/carl/
>
>
>
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-- 
Carl J. Schreck III, PhD
Postdoctoral Research Associate
Cooperative Institute for Climate and Satellites (CICS-NC)
North Carolina State University and NOAA's National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801
Tel: 828-257-3140
carl@cicsnc.org
http://monitor.cicsnc.org/mjo/
http://www.atmos.albany.edu/student/carl/

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Received on Wed Mar 28 13:03:59 2012

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