What open source software for auto-alignment of photographs?

From http://en.wikipedia.org/wiki/AutoStitch

"Autostitch uses methods known as SIFT and RANSAC. This program differs from some other image stitching software in that it automatically stitches together even unaligned or zoomed photographs seamlessly without user input, whereas others often require the user to highlight matching areas for the photographs to merge properly. The only requirement is that all photographs be taken from a single point."

Free demo for Windows (which works seamlessly on Linux under Wine) is available, and I never needed another tool for stitching of pics.

As mattdm correctly wrote above (in comment), this is similar question: Which tools are good for creating panoramas/stitching multiple photos? and autostitch is also there one of the answers. I love (and prefer) it for two reasons: - simple installation (one exe file, nothing to install) - simple to use - choose input pics, choose size of output image, and other settings you do not need to set/change if you don't want to

So it's not exactly open source, but it is free (demo), simple and works fine both on Windows and Linux.

Hugin's command-line align_image_stack has arguments for dealing with stereo pairs. You need to experiment with the settings, particularly the grid subdivision count -g, the point count -c and the prescale -s (larger images need to be scaled down more for the point detector to work reliably). Also make sure you pass in the FOV with -f. Here's a command line that generates a super-excellent stereo pair from two 1920x2560 images:

align_image_stack -f 35.09 -p stereotest.pto -a stereotest -v -g 3 -c 16 -i -d -s 3 -S -C -A -P P9010741.JPG P9010742.JPG

If this is in order to get a nice animation of the images, you can use Google Photos. Then, once they are in your library, select the images you want, click the big plus in upper right, and select Animation. A few seconds later, you have an animation of the aligned images.

^{This is as of 10/01/2017}