XPost: alt.os.linux

Regulars may remember some posts of mine from a year or two back
concerning scanning ancient family documents. A cousin of mine has done
a great deal of work in genealogy, creating some pretty large family
trees which I've scanned in sections. By hook or by crook, I've managed
to stitch together all the smaller ones, mostly 3x3, 3x4, or 3x5 scans,
but even on some of those I've seen some weird behaviour when trying to
use Hugin to stitch the sections together. Particularly that some
scans, although originally scanned identically to the others, are
assessed by Hugin to be somehow different from the others.

A couple of days ago, on a previous tree now completed, I was getting a
message that one scan was colour when all the others were greyscale, but
all other imaging software that I loaded it into showed it to be
greyscale. The only thing that was different about this section was
that I noticed I'd begun to move the document fractionally too soon
before the scan had completed, and that consequently a thin slice of the trailing edge of it was corrupted, but, as it was mostly empty, to save
myself having to set up everything all over again just to rescan that
section, I'd copied the bit that wasn't empty from the overlapping edge
of another successful scan. For some reason, Hugin alone stubbornly
maintained that the result was a colour scan, and in the end I did have
to go through the chore of rescanning the single section so that I could
stitch it.

Now, I'm trying to do a large tree of 4x15 scanned sections - which I
think must be drawn on something like wallpaper backing paper - and,
despite all the scans being done identically as greyscale, Hugin
maintains that the first two sections are greyscale and all the rest are
colour ...

Greyscale section acknowledged by Hugin as greyscale:
www.macfh.co.uk/Temp/01B.png
Greyscale section claimed by Hugin to be colour:
www.macfh.co.uk/Temp/01C.png

Can anyone see what the hell is going on here? What is different about
the first two scans, and why does it think all the others are colour
when no other software that I've tried agrees with it?

--

Fake news kills!

I may be contacted via the contact address given on my website:
www.macfh.co.uk

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)