mkdir build && cd build
cmake ..
make

-h [ --help ]          display help message

  Detect      detect face region & 5 facial points
  (det)       ./proc --mode=det --src_dir=sdir [--dst_dir=ddir]
  Clean       clean the invalid facial points data
  (clean)     ./proc --mode=clean --info_file=textfile [--dst_dir=ddir]
  Draw        draw facial pionts
  (draw)      ./proc --mode=draw --info_file=textfile [--dst_dir=ddir]
  Crop        crop facial region & resize to unified size
  (crop)      ./proc --mode=crop --info_file=textfile [--dst_dir=ddir] [--new_size=256]
  Normalize   align face & resize to unified size
  (norm)      ./proc --mode=norm --info_file=textfile [--dst_dir=ddir] [--new_size=256]

Args
--mode arg             [required] work mode
                       currently supported: det | clean | draw | crop | norm
--src_dir arg          [required] source directory
                       directory to store the source images
                       better to use absolute path
--dst_dir arg          [optional] destination directory
                       directory to store the processed images
                       default: current folder
--info_file arg        [required] information file
                       textfile to store the facial points information
--new_size arg         [optional] unified size, effective range [64, 1280]
                       default: 256
--parse_type arg       [optional] parse type: cmdline | config
                       parse parameters from command line or config file
                       default: cmdline
--config_file arg      config file
                       required if parse parameters from config file