interpolators

Q&A about the latest release Version
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Carel
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I am still mighty befuddled by the topic of interpolators. For instance when converting cubic back to equirectangular, Lancosz is "not allowed" but the various spline interpolators are.

I think there is an illustrated list of different interpolators hidden somewhere on Thomas's website, but I cant find it anymore.

Am I correct in thinking that spline 64 is better than spline 36? Then I have heard good things about Hamming or Hanning, but dont know which of the two was so highly recommended.

Any guidelines and/or "rules of thumb"?

Carel
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hum@no.id
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Hi!
cubic back to equirectangular
But where you found such function???
smooth
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hum@no.id wrote:Hi!
cubic back to equirectangular
But where you found such function???
In the same place you find equirectangular to cubic only after the event.

Regards, Smooth 8)
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hum@no.id
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Oops... I am a blind :oops:

I'm never used this remaping...

Carel rights... there there is problems described by him.
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thomas
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Carel wrote:I am still mighty befuddled by the topic of interpolators. For instance when converting cubic back to equirectangular, Lancosz is "not allowed" but the various spline interpolators are.
I think you need a newer pano12.dll or you can disable "use PanoTools" in the Pano2QTVR menu. Then all interpolators are available.
Carel wrote:I think there is an illustrated list of different interpolators hidden somewhere on Thomas's website, but I cant find it anymore.

Am I correct in thinking that spline 64 is better than spline 36? Then I have heard good things about Hamming or Hanning, but dont know which of the two was so highly recommended.
You can find them here http://www.pano2qtvr.com/dll_patch.php spline 64 is better than 36 but all the "old" interpolators suffer from aliasing. I personally prefer Mitchell and Lanczos3 from the new interpolators.
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Carel
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OK, almost there :-)

I remember seeing a page where the same image of the greek (?) stadium was used to compare all interpolators on one page. Something like: "click on one of the interpolator's names and an interpolated crop of the stadium is shown, using that interpolator.
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thomas
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Hmm... have not seen that for the new interpolators but it would be definitely a good idea to do this some day...
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360Texas
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I think you might have seen the Greek Theatre under the filter chart link anit-alising samples:

Burgruine Finkenstein. Original 6000x3000, Tilesize 400
NO Anti-alising

http://www.pano2qtvr.com/dll_patch.php
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Carel
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This is very strange. I seem to remember very clearly a page where one could click on a number of interpolators and see the results in rapid succession. The image used was the greek theater or a part of it. You could see how the text on the blue sign at the top of the theater became more or less readable depending on the interpolator used.

I remember feeling overwhelmed by all the slight variations, so I am rather certain that there were more than 4 interpolators shown. Oh, well, I guess I am hallucinating :(
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