options:
-d   --direction      <direction>                            [string]['TB', 'BT', 'LR', 'RL'][default: TB]
                      'TB' top to bottom
                      'BT' bottom to top
                      'LR' left to right
                      'RL' right to left
-o   --output         <output file name>                                           [string][default: result]
-f   --fold           <input files fold>                                                            [string]
-q   --quality        <quality>                                                          [float][default: 1]
-w   --width          <output width>                                                                   [int]
-h   --height         <output height>                                                                  [int]
-m   --mode           <output mode default>    [string]['1', 'L', 'P', 'RGB', 'RGBA', 'CMYK'][default: RGBA]

[file1, file2, ...]   <input files>                                                                 [string]