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I agree that it would be best to have all pan sharpening algorithms together if possible. New ones should be addable as new classes or methods in the existing module. Note that I did employ parallel processing to the extent possible. It might be possible to
apply this kind of processing to other sharpening algorithms.
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<div>Michael<br>
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<font class="Apple-style-span" face="Helvetica" size="3"><span class="Apple-style-span" style="font-size: 12px; ">C. Michael Barton </span></font></div>
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<div>On Nov 15, 2013, at 8:20 AM, Nikos Alexandris <<a href="mailto:nik@nikosalexandris.net">nik@nikosalexandris.net</a>> wrote:</div>
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<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">Moritz Lennert wrote:</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">..</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> I just did a quick test:</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> pan in:</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> mean: 31.813</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> standard deviation: 3.75447</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> </div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> ms in:</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> mean: 15.2307</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> standard deviation: 3.55858</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> </div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> pan out:</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> mean: 15.6117</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> standard deviation: 3.23408</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> So for this example, mean seems to have been adjusted, but stddev not.</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">Thanks. Looks not to be the exact same here too.</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > > > ? Would it be desired to get the HPFA algorithm integrated in</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > > > i.pansharpen?</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > > Yes. I think that if we have a generic module such as i.pansharpen, it</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > > would be preferable to have all pansharpening methods in that one</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > > module.</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > There is one "difference" in that HPFA treats all bands to be sharpened</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > separately. And, in this manner, it can be (mis-)used to sharpen any</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > low-res band. For example, WorldView-2 products have 8 multi-spectral</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> > bands. Hence the "not red= green= blue=" design so far from my side.</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> i.pansharpen does not imply rgb either (although the description of the</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> ms* parameters does suggest that. You can obviously use any ms bands you</div>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">> want.</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
<div style="white-space: pre-wrap; margin: 0px; text-indent: 0px; ">Yes, I know. I just wanted to avoid this r= g= b= logic. Maybe I am wrong and perhaps it is better, indeed, to follow the common path.</div>
<p style="white-space: pre-wrap; margin: 0px; text-indent: 0px; "> </p>
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