To run enter the following command, order of input matters:
python stochastic_motion_textures.py image.jpg layer_1_mask.jpg layer_1_type ... layer_n_mask.jpg layer_n_type number_of_frames

  where:
    image.jpg is the original image to be animated
    layer_1_mask.jpg is the foreground mask for the first foreground layer
    layer_1_type is the type of motion for the first foreground layer
    ...
    layer_n_mask.jpg is the foreground mask for the top most foreground layer
    layer_n_type is the type of motion for the top most foreground layer
    number_of_frames is the integer number of frames to render
        (code guarantees a fully looping set of images based on number of frames)

To generate an animated gif:
  ffmpeg -i image_directory/file_prefix_%04d.png out_video.gif


Special notes:
  Code is hard coded to use 3 letter extensions for images
  Order of layers matters, first layer is the bottom most foreground element,
    sequentially stacking to the last, top most, foreground element.
  Motion Types are as follows: boat, plant, water, cloud

Examples:
  python stochastic_motion_textures.py boatstudio.jpg boatstudio_water_mask.jpg water boatstudio_boat_mask.jpg boat 60
  python stochastic_motion_textures.py puerto_rico_boats.jpg puerto_rico_boats_left.jpg boat puerto_rico_boats_right.jpg boat 60
  python stochastic_motion_textures.py jet.jpg jet_mask.jpg cloud 60
  python stochastic_motion_textures.py bobble_head.jpg bobble_head_mask.jpg boat 30