align_image_stack - Align overlapping images for HDR or focus stack creation
align_image_stack [options]
input files
align_image_stack is used for the alignment of slightly misaligned images or for
the registration of a stereo images pair. 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.
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)
- --corr=num
- Correlation threshold for identifying control points
(default: 0.9)
-
-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.
- -d
- Optimize radial distortion for all images, except for
first.
- -i
- Optimize image center shift for all images, except for
first.
- -x
- Optimize X coordinate of camera position
- -y
- Optimize Y coordinate of camera position
- -z
- Optimize Z coordinate of camera position
- -S
- Assume stereo images - allow horizontal shift of control
points.
- -A
- Align stereo window - assumes -S
- -P
- Align stereo window with pop-out effect - assumes -S
- -C
- Auto crop the image to the area covered by all images
-
-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])
- --distortion
- Try to load distortion information from lens database
- --use-given-order
- Use the image order as given on the command line. (By
default images will be sorted by exposure values.)
- --gpu
- Use GPU for remapping
- -h
- Display help summary.
Written by Pablo d'Angelo. Also contains contributions from Douglas Wilkins,
Ippei Ukai, Ed Halley, Bruno Postle, Gerry Patterson and Brent Townshend.
Stereo functionality added by Vladimir Nadvornik.
This man page was written by Cyril Brulebois
<
[email protected]>, updated by Terry Duell, and is
licensed under the same terms as the hugin package itself.