reconstruction of a groundplan of a house

[northfrisia]

Hi,

from my parents house I have scans (1200 dpi...HUGE!) as tiles, which - when combined again -
hopefully result in one picture of the original.

The scan process was challenge...parts of the scans are overlapping and some parts are not
100% perpendicular.

I am looking for a software, which allows the interactive handling and concatenating of partly
overlapping huge single images with the possibility to correct things like not being in parallel to each
other or being upside down.

There are a lot of "stitching" software, but I found none, which came close to what I need.

Hugin creates 3D panoramas...but the resulting gorundplan is flat...

Is there some software, which I can use?

Cheers!
northfrisia

[b11n]

Hugin creates 3D panoramas...but the resulting gorundplan is flat...

https://hugin.sourceforge.io/tutorials/scans/en.shtml

Hugin is very versatile. It can deal with things that aren't panoramas, but the UI is heavily geared toward the former. It's been a while since I (ab)used it this way, so I can't offer more than recommend you don't rule it out too quickly, but I've definitely used it this way, and other freaky modes which aren't panoramas.

[John R. Graham]

Moved from Other Things Gentoo to Multimedia.

- John

[C5ace]

I did something like this using Gimp.
media-gfx/gimp

You will have to rotate and trim the borders of each tile and assemble then in a single image. Very time consuming!

[b11n]

I did something like this using Gimp.

It works, but it's a bit blunt. It leaves you working out the rotations with trial and error, and checking the results by eye, and GIMP runs like molasses with bitmaps this large. If we're talking A3 @ 1200dpi, that's over 270 megapixels per scan. If the whole job is 2x2 of those, we're talking a gigapixel image. Trying to check two scans align, even with a UHD monitor, just isn't practical at that level.

Hugin makes for a much smoother workflow, gets the rotations exact, not just what looks close enough, lets you mask the borders out of the scans, and handles blending (and even exposure blending) automatically. The interactive part of the process is much snappier, whereas with something like GIMP it's punctuated by waiting for layer previews to render every time you make small adjustments. For me, it's not that it's time consuming, it's that the time is broken up into lots of bits. With Hugin, you can be doing something else during the time consuming bit.