- Original Message -
I have scanned a map with my A4 scanner, but as the map is quite large,
it did take several scans. Now I try to put the thing back together.
The identification part is simple, because the map does contain a rectangular
grid, so that cutting on a grid line is possible. I can also rotate, so
that the grid is looking rectangular, but:
* the scanner (a not very expensive Microscan model) is not working completely
parallel, so that when the left and lower boundary are fine, the right
boundary is changing by 10 pixels to the left (on 3000 for the height).
How can I best deal with the distortion?
* Once I have these rectangular pieces, how do I best put them together
to one large map. By now I have scanned with 300dpi and the grid lines
are at a disctance of 2cm, so I can calculate at which absolute positions
I have to put the parts together, but I did not find a menu to put the
data into...
(I know that 300dpi is a lot, but I rather scan with high resolution and
compact it later...)
I do have a Duron 800 @ 256MB main memory, so that I can play around a bit
with large graphics as needed.
Any ideas?
Lutz
---
Are you sure that the map-grid really is orthogonal ?
Any map of the earth is a projection of a globe onto a plane, and that is impossible
to
do accurately for simple geometric reasons, there will always be small deficiences in
the grid requiring a bit of cheating along the edges.
Torben
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