VisualSFM Version = 0.5.26

  ------------------------------------------------
  VisualSFM sfm[options] input output.nvm [user_data_path]
  options = [match_option][sfm_option][misc_option][mvs_option]
  match_option = [+pairs/+import/+subset/+nomatch/]
    +pairs:   match image pairs from [user_data_path];
              use @range,step as path for sequence mode;
    +import:  load feature matches from [user_data_path]; 
    +subset:  enable preemptive feature matching when
              #images >= param_preemptive_switch;
    +nomatch: reconstruction without feature matching;
    default:  compute missing pairwise matches. 
  sfm_option = [+resume/+add/+skipsfm/+loadnvm/]
    +resume:  load NVM file, try add new images from 
              [input].txt, and grow the existing models;
    +add:     load NVM file, and find more points and
              projections for the existing models;
    +loadnvm: load NVM file and skip feature matching;
    +skipsfm: skip sparse and dense reconstruction;
    default:  run regular sparse reconstruction.
  misc_option = [+k=fx,cx,fy,cy/+shared][+sort][+gcp][+fixcam][+merge]
    +k:       fixed calibration, e.g. +k=1024,800,1024,600;
    +shared:  enforce shared calibration in the end;
    +sort:    keep the input image order in the output NVM;
    +gcp:     load [input].gcp and transform the 3D model.
    +fixcam:  keep existing cameras unmodified.
    +merge:   try model merging after sparse reconstruction
  mvs_option = [+pmvs/+cmvs/+cmp/]
    +cmvs:    undistort images, run CMVS/genOption, skip PMVS;
    +pmvs:    undistort images, run CMVS/genOption/PMVS;
    +cmp:     undistort images, write p-matrices for CMP-MVS;
    default: skip the entire dense reconstruction.
  The <input> can be the following: 
    a .txt file containing relative/absolute image paths,
    a folder path to look for .jpg files, or
    an existing NVM file.

  ------------------------------------------------
  VisualSFM listen[+log] port 
    Start the GUI and listen to a socket port for UI commands,
    which simulate menu clicks. Each command should in the form 
    of "id[c][s] [argument]\n". The [id] is an integer that 
    corresponds to a menu item, for which the complete list 
    can be found in the sample ui.ini file. The optional flag 
    [c][s] corresponds CTRL and SHIFT press; The [argument] is 
    for the input string like filepath.
    Log messages will be send to client if +log is specified
   puis relancer BA
  ------------------------------------------------
  VisualSFM sfm[export_op   puis relancer BAtions] input output.txt
    +exportp: export putative feature matches
    +exportf: export F-matrix inlier matches

  ------------------------------------------------
  VisualSFM siftgpu[+ascii] image_list_file
    Detect features for a list of images