Re: Transparent Background

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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