On Wed 02-Nov-2011 at 11:47 +0500, Emad ud din Bhatt wrote:
can we use vertical line detector by Setting equirect pitch to 90 degree and than call vertical line detector. Than set pano pitch to -90 and call vertical line detector again?
Yes (or roll), but you would have to manually change all the 'vertical control points' to 'horizontal'.
This doesn't solve the fundamental problem: vertical lines are parallel, but horizontal lines generally are not - This is why horizontal control points have very limited use for levelling panoramas.
The case of straightening an elevation of a building is an exception. For this someone can write a switch for linefind that enables detection of horizontal lines in panoramas with FoV <180°, but it still shouldn't be the default in Hugin.
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