Re: [ferret_users] Fwd: ps file to gif or png or jpg

[Hein Zelle <hein.zelle@xxxxxxxxxxxxx>]

Dear Xueli,

> I have a question over converting ps file produced by ferret to gif
> or png or jpg format.  When I use convert command to do the
> conversion the picture is cut off. So far I haven't found a way to
> make it. Does anyone know how to fix this?

Ferret's postscript output (from Fprint) is not quite perfect
regarding the boundingbox.  You need to trim the picture properly
before converting to a bitmap image.  Over the years I've tried
several methods, it depends a bit on your system and the ferret
version.   Try one of these and check if the boundingbox is now
properly converted:

1)   use ps2eps to create a proper eps file:

     cat ferret_output.ps | ps2eps -B > ferret_output.eps
     convert ferret_output.eps ferret_output.png

2)   using a large bitmap as intermediate format (requires gs and netpbm):

     gs -dSAFER -dNOPAUSE -r300  -dDEVICEWIDTHPOINTS=864 -dDEVICEHEIGHTPOINTS=864 -sDEVICE=ppmraw -q -sOutputFile=- -f ferret_output.ps -c showpage -c quit | pnmcrop | convert pnm:- PNG:ferret_output.png
     
     convert -scale 35% ferret_output.png ferret_small.png

3)   There are other tools such as eps2eps and psfixbb.  I don't use those
     anymore but they may work for you.

4)   your problem could be in the rotate command.  Does the cropping
     also happen if you don't rotate?  If that fixes it, do the rotate
     in a separate step based on the png file.

Kind regards,

     Hein


-- 

Dr. Hein Zelle
Advisor Meteorology & Oceanography

Tel:    +31 (0)527-242299
Fax:    +31 (0)527-242016
Email:  hein.zelle@xxxxxxxxxxxxx
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