Re: Stitching scanned sections of large format diagrams

Jeff Liebermann wrote:

On Mon, 25 May 2009 21:45:42 -0500, msg <msg@xxxxxxxxxxxxxxxxx> wrote:


I would appreciate some suggestions for stitching together scanned
sections of large format diagrams (schematics)

<snip>

What are folks using for a simple solution to this task (other than
purchasing an expensive large-format scanner)?


I use several programs.

<snipped list>

Have you used any of them to stitch 1bpp scans of schematics? I found
a tutorial for using 'hugin' (opensource) to stitch scans; it is an
involved procedure and it worked for me in a test of stitching two
1600dpi 8.5x11 1bpp scans of a schematic, but took twenty minutes on
a 700MHz pIII. Since my scanner doesn't have much racking distortion,
I can live with simple joins and MS Photoed permits previewed dragging
of selected areas with shrinking and expanding, so it would be a quicker
solution (it needs a LOT of physical ram however). Can anyone point me
to a stand alone installer for it?

I have no idea what you mean by "large" number of "high-resolution"
images. Some numbers would be nice.

Well, a typical 'large' collection for me would be eight 1600dpi 8.5x11
1bpp scans; I imagine that with a simple photo editor, I would work with
two at a time.

I've stitched together about 30 images, consisting of 8 megapixel 24
bit BMP images using Panorama Factory without difficulties. The
result was something like a 1.5 Gigabyte file size. It also took
about an hour on my ancient PIII/1GHz. The latest version supports 64
bit processors, which may work better if your images are truely huge
and numerous or possibly hitting a 2GByte file size limit.

Sounds faster than what I am getting using 'hugin', whose optimizer only
has selections for SSE and number of CPUs; if I can figure out how to get
it to 'nudge' the joins instead of blending, I would expect that it would
work faster.

Michael
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