Difference between revisions of "Align image stack"
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− | align_image_stack is a command-line tool available in the development version of [[hugin]] to align overlapping images to facilitate [[HDR]] creation, [[Exposure blending]], extended [[Depth of Field]], and [[Stereoscopic]] images. | + | align_image_stack is a command-line tool available in the development version of [[hugin]] to align overlapping images to facilitate [[HDR]] creation, [[Exposure blending]], extended [[Depth of Field]], and [[Stereoscopic]] images. |
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+ | For example, align_image_stack is useful in aligning stacked images. The newly created, stacked inages might then be focus stacked using a tool like [[enfuse]]. | ||
== Usage == | == Usage == |
Revision as of 08:14, 27 April 2017
align_image_stack is a command-line tool available in the development version of hugin to align overlapping images to facilitate HDR creation, Exposure blending, extended Depth of Field, and Stereoscopic images.
For example, align_image_stack is useful in aligning stacked images. The newly created, stacked inages might then be focus stacked using a tool like enfuse.
Usage
align_image_stack [options] input_files
Options: modes of operation
-p file
Output .pto file. (Useful for debugging, or further refinement.)
-a prefix
Align images, output as prefix_xxxx.tif.
-o output
Merge images to HDR, generate output.hdr.
Options: modifiers
-v
Verbose, print progress messages.
-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 the camera position.
-y
Optimize Y coordinate of the camera position.
-z
Optimize Z coordinate of the camera position. Useful for aligning more distorted images.
-S
Assume stereo images - allow horizontal shift of control points. Adds all control points as "horizontal lines".
-A
Align stereo window - assumes -S. Adds one "normal" control point that is the nearest point, so that everything will appear behind the display plane.
-P
Align stereo window with pop-out effect - assumes -S. Adds one "normal" control point that is the nearest point from the border areas, so that the center of the image may appear in front of the display plane.
-C
Auto crop the image to the area covered by all images.
-c num
Number of control points (per grid, see option -g) to create between adjacent images (default: 8).
-l
Assume linear input files.
-s scale
Scale down image by 2scale (default: 1 [2x downsampling]). Scaling down images will improve speed at the cost of accuracy.
-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 from command line. (By default images will be sorted by exposure values as found in EXIF data.)
--gpu
Use GPU for remapping.
-h
Display help.