json.extract!(
  @image, :id, :filename, :content_type, :content_hash,
  :content_length, :colorspace, :real_width, :real_height, :crop_width,
  :crop_height, :crop_start_x, :crop_start_y, :crop_gravity_x,
  :crop_gravity_y, :alternative, :caption, :created_at, :updated_at
)