class ImageProcessing::MiniMagick::Processor

def convert_to_path(file, name)

Converts the image on disk in various forms into a path. 
def convert_to_path(file, name)
  if file.is_a?(String)
    file
  elsif file.respond_to?(:to_path)
    file.to_path
  elsif file.respond_to?(:path)
    file.path
  else
    raise ArgumentError, "#{name} must be a String, Pathname, or respond to #path"
  end
end