PanoTools NG:
Re: best practise for straight line control points?
Jim Watters 2008-Nov-25 15:10:12
paul womack wrote:
> I want the pano to be exactly square, so I need to set horizontal and vertical control points - of course, being a map, there are grid lines, ideally suited to placing such points.
>
> But what's best?
>
Horizontal and vertical control points are evaluated in single pairs.
Their order does not matter. I would place them as far apart as possible.
For straight lines the first pair of points are compared to the other
pairs of points. It is best to place the first pair of points as far
apart as possible. Then add additional pair of points for that line.
Straight line points are mostly a substitute when there is not enough
detail to add normal points.
To keep the result square it probably is only necessary to add 2 of both
hor and vert lines. Three of each will not hurt. And only add the
straight lines if there is not enough detail to add other points.
--
Jim Watters
jwatters @ photocreations . ca
http://photocreations.ca
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