[gdal-dev] Issues converting images

[Even Rouault]

Le mardi 21 décembre 2010 20:06:16, Michael Buchoff a écrit :
> As far as I can tell, the -scale option only sets the terrain extents. 
> GDAL seems to be handing this fine.  We are looking to downconvert our
> bits-per-pixel and preferably strip out the histogram for something more
> widely recognized.
> 
> Am I misunderstanding something?

Yes, probably ;-)

http://gdal.org/gdal_translate.html seems quite clear to me. The -scale acts 
on pixel values, which is what you want, and not the raster extent.

> 
> -----Original Message-----
> From: Even Rouault [mailto:even.rouault at mines-paris.org]
> Sent: Tuesday, December 21, 2010 2:00 PM
> To: gdal-dev at lists.osgeo.org
> Cc: Michael Buchoff; Larry Clark; Glen Johnson
> Subject: Re: [gdal-dev] Issues converting images
> 
> Le mardi 21 décembre 2010 19:50:13, Michael Buchoff a écrit :
> > We are currently having issues downconverting an 11-bit img file
> > pointing to a 16-bit histogram into an 8-bit tiff file for common
> > viewers.  The gdalinfo for the sourcefile is on pastebin
> > (http://pastebin.com/2QBuqwEp).  Do you have any recommendations on how
> > we can do this?
> 
> Did you investigate the -scale option of gdal_translate ?
> 
> > Thanks in advance.
> > 
> > 
> > 
> > 
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