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=head1 NAME
hugin_stacker - stack overlapping images to a single image
=head1 SYNOPSIS
B<hugin_stacker> [options] --mode=STRING images
=head1 DESCRIPTION
B<hugin_stacker> acts on a stack of overlapping images and produces a combined image
and/or a set of masked output images.
B<hugin_stacker> is useful for e.g.
=over
=item * automatic tourist removal (not only tourists, also other moving
objects ;-))
=item * noise reduction
=item * visualize movement
=item * multiplicity
=back
=head1 OPTIONS
=over
=item B<--mode>
Select stack mode:
=over
=item B<min|minimum|darkest>
Select the darkest pixel.
=item B<max|maximum|brightest>
Select the brightest pixel.
=item B<avg|average|mean>
Calculate the mean for each position.
=item B<median>
Calculate the median for each position.
=item B<winsor>
Calculate the Winsor trimmed mean for each position.
The parameter can be set with B<--winsor-trim=NUMBER> (default: 0.2).
=item B<sigma>
Calculate the sigma clipped mean for each position.
Fine-tune with B<--max-sigma=NUMBER> (default: 2)
and B<--max-iterations=NUMBER> (default: 5).
=back
=back
=head2 Further parameters
=over
=item B<--output=FILE>
Set the filename for the output file (if not given final.tif is used).
=item B<--compression=value>
Set the compression of the output files.
For jpeg files use values between 0 and 100.
For tiff files valid values are: PACKBITS, DEFLATE, LZW.
=item B<--bigtiff>
Write output in BigTIFF format (only with TIFF output).
=back
=head2 Mask input images
=over
=item B<--mask-input>
Beside the stacked output hugin_stacker can also mask the
input images (available only for stacking modes median|winsor|clip). This mode
is activated with --mask-input. In this case the stacked image is first
calculated. Then each pixel in each image is checked: if the value of this
pixel differs more then mask sigma * standard deviation from the mean/median,
this pixel is made visible. If it is in the mentioned range the pixel is masked
out.
=item B<--mask-sigma=NUMBER>
sets the sigma parameter for --mask-input. Default is 2.
=item B<--mask-suffix=STRING>
Output a separate mask image for each input image named I<inputfilenameSTRING>.
Default value is "_mask".
=item B<--multi-layer-output>
Output a layered TIFF with the name specified
with B<--output>. The file contains the averaged image as layer 0 and all input images
as additional layers with the mask as described above.
=back
=head1 AUTHORS
POD-format documentation converted from L<https://wiki.panotools.org/Hugin_stacker> by
Andreas Metzler
|
