Re: Strange effects when just changing sizes (gmh: message 2 of 20)

Hello Bob,

> > gm composite -compress LZW -geometry +0+118 -gravity North -resize 2244x3153
> > -units PixelsPerInch -density 300x300 source.tif
> > -size 2481x3508 xc:white result.tif
> >
> > But when I run this, the result looks terrible: the background is black and the
> > text looks like some kind of edge-detecting filter has been used. That's the
> > output of gm identify:
> 
> It surely does look terrible.  I built 1.3.20 from source code to see 
> if I could reproduce the terrible effect, but the results are 
> wonderfully clean.
> 
> Did you build GraphicsMagick from source yourself, or is this 
> installed via a package from an OS distribution?

It's the version from debian testing:

% dpkg -l graphicsmagick\* | egrep '^ii'
ii  graphicsmagick                    1.3.20-3+deb8u1 amd64        collection
of image processing tools

 
> 
> What version of libtiff are you using?  You can find that like
> 

% gm convert -list formats | grep LIBTIFF
     TIFF P  rw+  Tagged Image File Format (LIBTIFF, Version 4.0.3)

> Since I am not able to reproduce the problem, I am suspecting a build 
> problem.

I'll try to build from sources to verify. How could I create a simple file
similar to my source.tif? If it's a bug in the debian package I'd like to write
a proper bugreport...


Thanks for your help,
-- 
Markus Grunwald
https://www.the-grue.de

Fragen zur Mail? https://www.the-grue.de/mail_und_co
https://www.the-grue.de/~markus/markus_grunwald.gpg

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