[nSLUG] Image utility for Linux?

Jason Kenney jdkenney at gmail.com
Tue Apr 24 01:59:52 ADT 2007

I believe what you want is called "image registration".


On 4/24/07, Mike Spencer <mspencer at tallships.ca> wrote:
> Way back, I had a hand scanner on Windows 3.1.  Since it could only
> scan a narrow strip, the Logitech software included a utility to
> automagically align and paste strips together.  It worked surprisingly
> well for me when I did some 8x10 B&W photos.
> Now I have a flatbed scanner that works fine with SANE.  But I want to
> scan a portfolio of architectural line drawings that are just a tad
> too big for the scanner.
> Is there a Linux command line utility that will do this trick with two
> overlapping PBM images?  Or, for that matter, *any* Linux software that
> will do this for *any* image data format?
> The images are too big for manual manipulation on the screen and I'd
> like to keep the original large format for archival purposes.
> Failing that, is there a technical key word for doing this trick that
> would help me google?
> Shingling off even further onto the fog:
> If it were guaranteed that the two overlapping images were bit for bit
> identical in their overlapping areas, it would be more or less
> straightforward, albeit tedious, to write something with libpnm,
> especially considering that these are line drawings.  But it's
> reasonable to assume that the overlapping area will only be very
> similar, not identical, which would mean a fuzzy matching algorithm.
> Which is much harder.  Ho hum.
> Is there now a C algorithm (possibly well-known to everyone but me :-)
> for doing this sort of thing?  I recall talking to one of the genome
> guys at NRC back about 1992.  They were having a hard time doing this
> kind of matching between DNA fragments, where they wanted to find
> matches between fragments that were *nearly* the same.  So is there
> now some canned code that I could use if I want to try to write
> something?
> Or any other suggestions on how to accomplish this?
> Thanks,
> - Mike
> --
> Michael Spencer                  Nova Scotia, Canada       .~.
>                                                            /V\
> mspencer at tallships.ca                                     /( )\
> http://home.tallships.ca/mspencer/                        ^^-^^
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