ECC image alignment algorithm (image registration)

Image Alignment Toolbox link has been updated

a bug in pamam_update function is fixed

1) The code is updated and deals better with partially overlapped images.
2) A new demo demonstrates the alignment with partial overlap
3) Bugs for euclidean alignment have been fixed

ECC deals with Euclidean transformation (rotation+translation). The user can enable any of the following transformations: translation, euclidean, affine, homography

Bugs in demo file have been fixed.

1) The algorithm deals with translation transform as well

2) Some compatibility problems with recent versions of Matlab have been resolved

1) The main function also accepts color (RGB) images. 2) minor bugs are fixed

bugs fixed

Some minor bugs have been resolved. Note that in this updated version,
warp initialization is the original affine or homography matrix and
diagonal elements are not the distance from unit. This might cause a
kind of confusion to users.

Revised description