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NAME

       align_image_stack - Align overlapping images for HDR or focus stack
       creation

SYNOPSIS

       align_image_stack [options] input files

DESCRIPTION

       align_image_stack is used for the alignment of slightly misaligned
       images. When several differently exposed images are taken in the
       process of creating a High Dynamic Range image, the images are not
       perfectly aligned, and the quality of the HDR image created will suffer
       from this. align_image_stack uses the tools available to hugin to
       optimize the roll, pitch and yaw, as well as some parameters of the
       lens geometry, to align the images

OPTIONS

       Modes of operation:

       -p file
           Output .pto file (useful for debugging, or further refinement)

       -a prefix
           Output aligned images as prefix_xxxx.tif

       -o output
           Align images and merge them to HDR, generate output.hdr

       Modifiers:

       -v  Verbose, print progress messages. Repeat for higher verbosity

       -e  Assume input images are full frame fish eye (default: rectilinear)

       -t num
           Remove all control points with an error higher than num pixels
           (default: 3)

       -f HFOV
           Approximate horizontal field of view of input images, use if EXIF
           info not complete

       -m  Optimize field of view for all images, except for first. Useful for
           aligning focus stacks with slightly different magnification.

       -c num
           Number of control points (per grid) to create between adjacent
           images (default: 8)

       -l  Assume linear input files

       -s scale
           Scale down image by 2^scale (default: 1 [2x down-sampling])

       -g gsize
           Break image into a rectangular grid (gsize x gsize) and attempt to
           find num control points in each section (default: 5 [5x5 grid])

       -h  Display help summary.

AUTHORS

       Written by Pablo d’Angelo. Also contains contributions from Douglas
       Wilkins, Ippei Ukai, Ed Halley, Bruno Postle, Gerry Patterson and Brent
       Townshend.

       This man page was written by Cyril Brulebois
       <cyril.brulebois@enst-bretagne.fr> and is licensed under the same terms
       as the hugin package itself.