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From: Even Rouault <even.rouault@mines-paris.org>
To: tiff@lists.maptools.org
Date: Mon, 24 May 2010 19:45:57 +0200
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Subject: Re: [Tiff] Script Oriented, File Based Utility for Resampling TIFF
 Files
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You could try with GDAL utilities. gdal_translate or gdalwarp depending of =

your exact needs.

Le Monday 24 May 2010 05:52:24 Kevin Myers, vous avez =E9crit=A0:
> I am working with a large number (thousands) of extremely large tiff imag=
es
> (hundreds of megapixels or larger) that need to be resampled, most of them
> from 300 dpi to 200 dpi.  Currently I am using GraphicsMagick for this
> purpose  GraphicsMagick is an excellent program, but it is very slow for
> the images that I am dealing with due to their size and GraphicsMagick's
> memory-oriented implementation (it essentially wants to load the entire
> image into memory at one time, since the image won't fit into RAM in the
> representation used by GraphicsMagick, it is paged to and from disk, which
> is very slow).
>
> In order to speed up this process, I need a script oriented resampling
> utility that can only load portions of images (e.g tiles or strips) into
> memory at one time, something similar to tiffcp.  Both tiffcp and its
> cousin tiffcrop can manipulate tiff images without loading the entire ima=
ge
> into memory, but neither is capable of true resampling to my knowledge. =

> Does anyone know of a script (command line) oriented strip/tile based
> re-sampling utility for tiff files?
>
> Thanks,
> Kevin M.
>
>
> _______________________________________________
> Tiff mailing list: Tiff@lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/tiff
> http://www.remotesensing.org/libtiff/


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