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=encoding utf8
=head1 NAME
pto_mask - Apply a mask
=head1 SYNOPSIS
B<pto_mask> [options] input.pto
=head1 DESCRIPTION
B<pto_mask> applies a mask to nominated images
=head1 USAGE
pto_mask --mask=maskfile
=head1 OPTIONS
=over
=item B<-o> | --output=file.pto
Output Hugin PTO file. Default: <filename>_mask.pto
=item B<--mask=filename@imgNr>
Read the mask from the file and assign to given image
=item B<--rotate=CLOCKWISE|90|COUNTERCLOCKWISE|-90>
Rotates the mask clock- or counterclockwise
=item B<--process=CLIP|SCALE|PROP_SCALE>
Specify how the mask should be modified if the mask is created for an image with different size
* CLIP: clipping (Default)
* SCALE: Scaling width and height individually
* PROP_SCALE: Proportional scale
=item B<-h> | --help
Shows this help
=back
=head1 AUTHORS
Thomas Modes
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