NAME

       linefind - Detect vertical features in images

SYNOPSIS

       linefind [options] -o output.pto input.pto

DESCRIPTION

       linefind is a detector for vertical features in images. It tries to find vertical lines
       using the same algorithm as Calibrate_lens_gui and assigns vertical control points to
       them. The detection runs on the source images, if the input images are rectilinear images.
       In the other cases (e. g. fisheye images) the input images are reprojected to an
       equirectangular projection and the detection works on the reprojected images. It uses the
       roll value, saved in the pto project file, to determine what is "top" and "bottom". So
       before running linefind check that your roll values are correct (E. g. when using images
       straight from the camera, use a roll value of 0 for landscape and a value of 90 or 270 for
       portrait images. If your camera has an orientation sensor, Hugin can detect this
       information automatically and sets the roll value accordingly when adding such images into
       Hugin.

OPTIONS

       -o|--output output.pto
           Output Hugin PTO file. Default: '<filename>_line.pto'.

       -l|--lines num
           The maximum number of lines added per image (default: 5) Attention: Keep in mind that
           more vertical control points will dominate the optimisation in favour of "normal"
           control points.

       -i|--image num
           Image number(s) to process.  Normally linefind tries to find vertical lines in all
           images of the project file. If you want to limit the detection to some selected
           images, you can use this parameter. Can be used multiple times.

       -h|--help
           shows help

AUTHORS

       Thomas Modes, line detection code based on calibrate_lens by Tim Nugent

"Version: 2022.0.0"                         2023-02-05                                LINEFIND(1)