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i.pansharpen uses Python, not Bash. So it is not an integer math problem.
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<div>However, you might try changing your input maps to float or DCELL. See if that changes things.</div>
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<div>Michael<br>
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<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">______________________________</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">C. Michael Barton </span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Director, Center for Social Dynamics & Complexity</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Professor of Anthropology, School of Human Evolution & Social Change</span></font></div>
<div><span class="Apple-style-span" style="font-size: 12px; font-family: Helvetica; ">Arizona State University</span></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Tempe, AZ 85287-2402</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">USA</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; "><br>
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<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">voice:<span class="Apple-converted-space"> </span><span class="Apple-tab-span" style="white-space: pre; ">
</span>480-965-6262 (SHESC), 480-727-9746 (CSDC)</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">fax: 480-965-7671(SHESC), 480-727-0709 (CSDC)</span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">www: <span class="Apple-tab-span" style="white-space: pre; ">
</span><a href="http://csdc.asu.edu">http://csdc.asu.edu</a>, <a href="http://shesc.asu.edu">
http://shesc.asu.edu</a></span></font></div>
<div><font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "></span><a href="http://www.public.asu.edu/~cmbarton">http://www.public.asu.edu/~cmbarton</a></span></font></div>
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<div>On Jan 31, 2013, at 2:11 AM, <<a href="mailto:grass-user-request@lists.osgeo.org">grass-user-request@lists.osgeo.org</a>></div>
<div> wrote:</div>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>From:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">Yann Chemin <<a href="mailto:yann.chemin@gmail.com">yann.chemin@gmail.com</a>><br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>Subject:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; "><b>Re: [GRASS-user] unexpected i.pansharpen results</b><br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>Date:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">January 31, 2013 2:11:33 AM MST<br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>To:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">Hamish <<a href="mailto:hamish_b@yahoo.com">hamish_b@yahoo.com</a>><br>
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<span style="font-family: Helvetica; font-size: medium; color: rgb(127, 127, 127); "><b>Cc:<span class="Apple-converted-space"> </span></b></span><span style="font-family: Helvetica; font-size: medium; ">GRASS user list <<a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>><br>
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hmmm, yes that looks like an old friend to check...<br>
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<div class="gmail_quote">On 31 January 2013 14:06, Hamish<span class="Apple-converted-space"> </span><span dir="ltr"><<a href="mailto:hamish_b@yahoo.com" target="_blank">hamish_b@yahoo.com</a>></span><span class="Apple-converted-space"> </span>wrote:<br>
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<td valign="top" style="font: inherit; ">(sorry for the html,top posting)<br>
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I wonder if the script is doing integer division when it should be doing floating point division?<br>
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<a href="http://trac.osgeo.org/grass/browser/grass/trunk/scripts/i.pansharpen/i.pansharpen.py" target="_blank">http://trac.osgeo.org/grass/browser/grass/trunk/scripts/i.pansharpen/i.pansharpen.py</a><br>
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Hamish<br>
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--- On<span class="Apple-converted-space"> </span><b>Wed, 1/30/13, Eric Goddard<span class="Apple-converted-space"> </span><i><<a href="mailto:egoddard1010@gmail.com" target="_blank">egoddard1010@gmail.com</a>></i></b><span class="Apple-converted-space"> </span>wrote:<br>
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From: Eric Goddard <<a href="mailto:egoddard1010@gmail.com" target="_blank">egoddard1010@gmail.com</a>><br>
Subject: [GRASS-user] unexpected i.pansharpen results<br>
To:<span class="Apple-converted-space"> </span><a href="mailto:grass-user@lists.osgeo.org" target="_blank">grass-user@lists.osgeo.org</a><br>
Date: Wednesday, January 30, 2013, 8:30 AM
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<div>Hi all,<br>
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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:<br>
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<a rel="nofollow" href="http://i.pansharpen.py/" target="_blank">i.pansharpen.py</a><span class="Apple-converted-space"> </span>"sharpen=ihs" "ms3=ik_mss.4@eric" "ms2=ik_mss.3@eric" "ms1=ik_mss.2@eric" "pan=ik_pan@eric" "output_prefix=ik_ihs" <span class="Apple-converted-space"> </span><br>
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<div>The input bands are linked via r.external, would that matter?<br>
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The output from my test area is below. Any assistance would be greatly appreciated.<span><image.png></span><br>
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Thanks,<br>
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Eric<br>
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