That's true, John. I have solved difficult ones using that technique.
But I'm pretty careful leveling my camera/head and often find the
simple PTgui horizontalisation function is good enough.
On Mon, 02 Oct 2006 17:05:59 +0900, John Houghton
> --- In PanoToolsNG@yahoogroups.com, "Roger D. Williams" <roger@...>
>> It is usually possible to get the horizon right when working with
>> PTgui and it is well worth doing. Was there a problem with using
>> the horizon leveling function? You do need to re-optimize
> Automatic levelling features will not usually guarantee to accurately
> level the panorama. Their success depends upon how accurately the
> panorama head was levelled. In a subject like this, accurate
> levelling can be performed in no more than a couple of minutes using
> the optimizer by adding some vertical line (t1) control points.
> (Note that you must use the Panorama Tools optimizer, though, as
> PTGui's optimizer doesn't support t1,t2 and tn points). You can also
> level the finished panorama image using exactly the same technique.
> There's no shortage of tutorials for guiding you through these
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