On 6 May 2014 09:20, paul womack <[email protected]> wrote:
> I am about to visit a record office. Their rules
> permit cameras, but not tripods (let alone pano heads!)
>
> I wish to capture the image of some 18th c maps, which are large,
> in good detail. The obvious strategy is to take multiple
> shots and stitch, but the shots will all be taken from different
> position and angles (since they'll be taken freehand).
>
> But since the maps are 2D a stitch should still be possible.

This can be done, I did the same with a painting that I wanted in
detail (though I had to the additional problem of having to wait for
the gallery attendant to leave the room).

The main issue is shooting handheld with insufficient or badly angled
light, see if they will let you use a flash. The other problem was
that surfaces that look flat are probably not, so try and have the
camera as perpendicular as possible, and maybe take some weights to
pull out the corners of the map.

In terms of aligning in Hugin, you can get this to work, but mosaic
optimisation isn't as stable as normal panorama alignment; the trick
is to get everything nearly right with a small number of photos and as
few parameters as possible, then gradually add photos and optimisation
parameters. A good tip would be to shoot a single overall shot and use
this as an anchor image to align the detail photos, then delete the
anchor photo once you have a rough alignment.

-- 
Bruno

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