[GRASS-user] unexpected i.pansharpen results

[Eric Goddard]

Thanks Michael, I'll give that a try and see what happens.
On Jan 31, 2013 12:16 PM, "Michael Barton" <Michael.Barton at asu.edu> wrote:

>  i.pansharpen uses Python, not Bash. So it is not an integer math
> problem.
>
>  However, you might try changing your input maps to float or DCELL. See
> if that changes things.
>
>  Michael
>          ______________________________
> C. Michael Barton
> Director, Center for Social Dynamics & Complexity
> Professor of Anthropology, School of Human Evolution & Social Change
> Arizona State University
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> USA
>
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>
>  On Jan 31, 2013, at 2:11 AM, <grass-user-request at lists.osgeo.org>
>  wrote:
>
>  *From: *Yann Chemin <yann.chemin at gmail.com>
>  *Subject: **Re: [GRASS-user] unexpected i.pansharpen results*
>  *Date: *January 31, 2013 2:11:33 AM MST
>  *To: *Hamish <hamish_b at yahoo.com>
>  *Cc: *GRASS user list <grass-user at lists.osgeo.org>
>
>
>  hmmm, yes that looks like an old friend to check...
>
>
> On 31 January 2013 14:06, Hamish <hamish_b at yahoo.com> wrote:
>
>>   (sorry for the html,top posting)
>>
>> I wonder if the script is doing integer division when it should be doing
>> floating point division?
>>
>>
>> http://trac.osgeo.org/grass/browser/grass/trunk/scripts/i.pansharpen/i.pansharpen.py
>>
>>
>> Hamish
>>
>> --- On *Wed, 1/30/13, Eric Goddard <egoddard1010 at gmail.com>* wrote:
>>
>>
>> From: Eric Goddard <egoddard1010 at gmail.com>
>> Subject: [GRASS-user] unexpected i.pansharpen results
>> To: grass-user at lists.osgeo.org
>> Date: Wednesday, January 30, 2013, 8:30 AM
>>
>>
>>   Hi all,
>>
>> I'm attempting to pansharpen some ikonos imagery using the i.pansharpen
>> tool in Grass7 on windows 7 installed via OSGeo4W (r54756-478).  The range
>> for the sharpened red, green, and blue outputs are 0-30, which seems
>> suspicious given the 16bit range of the input bands. The command I used was:
>>
>> i.pansharpen.py "sharpen=ihs" "ms3=ik_mss.4 at eric" "ms2=ik_mss.3 at eric"
>> "ms1=ik_mss.2 at eric" "pan=ik_pan at eric" "output_prefix=ik_ihs"
>>
>>  The input bands are linked via r.external, would that matter?
>>
>>  The output from my test area is below. Any assistance would be greatly
>> appreciated.<image.png>
>>
>>
>>  Thanks,
>>  Eric
>>
>>  -----Inline Attachment Follows-----
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