On 4/15/07, Julien Michielsen wrote:

It regularly so happens I'd like to merge/overlap two digital pictures. Gimp does have tools to fit two pictures by hand (take one picture as a layer, and turn and twist them till they fit almost perfectly). However, almost perfectly may not be good enough, and I wonder if a search proce- dure could be develloped to find margins of two pictures that almost perfectly overlap? I suppose it will be impossible to find regions that really perfectly overlap, as the light may vary, a butterfly might happen to have come inside the picture, and so on. I may be mistaken, but as far as I know photoshop can automaticaly overlap two pictures. Did Gimp ever try to automaticaly achieve perfect overlaps of two pic- tures, and - if this had been considered impossible - have the merits of fuzzy logic been considerd to achieve this aim? --
Julien Michielsen

Hi,

Have you ever tried hugin? http://hugin.sourceforge.net/

Chris

Julien Michielsen wrote:

It regularly so happens I'd like to merge/overlap two digital pictures. Gimp does have tools to fit two pictures by hand (take one picture as a layer, and turn and twist them till they fit almost perfectly). However, almost perfectly may not be good enough, and I wonder if a search proce- dure could be develloped to find margins of two pictures that almost perfectly overlap?

What you want is a technique like the SIFT algorithm to identify similar features in two images. I recommend the autopano-sift tools:

http://user.cs.tu-berlin.de/~nowozin/autopano-sift/

Also available is Autopano (which is a different program)

http://autopano.kolor.com/

While you are looking at this, if you are interested in panoramas or even just trying to make a larger image out of two overlapping scans, you should also try Hugin

http://hugin.sf.net/

These tools can be used together to streamline panorama generation and can be used to create fabulous (and massive) wide-angle images.

Cheers, Toby Haynes

On Sunday 15 April 2007 22:51, Toby Haynes wrote:

Julien Michielsen wrote:

It regularly so happens I'd like to merge/overlap two digital pictures. Gimp does have tools to fit two pictures by hand (take one picture as a layer, and turn and twist them till they fit almost perfectly). However, almost perfectly may not be good enough, and I wonder if a search proce- dure could be develloped to find margins of two pictures that almost perfectly overlap?

What you want is a technique like the SIFT algorithm to identify similar features in two images. I recommend the autopano-sift tools:

http://user.cs.tu-berlin.de/~nowozin/autopano-sift/

Also available is Autopano (which is a different program)

http://autopano.kolor.com/

While you are looking at this, if you are interested in panoramas or even just trying to make a larger image out of two overlapping scans, you should also try Hugin

http://hugin.sf.net/

These tools can be used together to streamline panorama generation and can be used to create fabulous (and massive) wide-angle images.

Cheers, Toby Haynes
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Are these tools useful for top-to-bottom merges or even diagonal merges?

On Mon 16-Apr-2007 at 07:57 -0400, John R. Culleton wrote:

http://hugin.sf.net/

These tools can be used together to streamline panorama generation and can be used to create fabulous (and massive) wide-angle images.

Are these tools useful for top-to-bottom merges or even diagonal merges?

You can use them to stitch pictures in any arrangement (rows, columns, grids, random rotations, etc...) if that is what you mean.