code: public Result decodeWithState(BinaryBitmap image) throws NotFoundException {
      // Make sure to set up the default state so we don't crash
      if (readers == null) {
        setHints(null);
      }
      return decodeInternal(image);
    }
docs: Decode an image using the state set up by calling setHints() previously. Continuous scan
  clients will get a <b>large</b> speed increase by using this instead of decode().
  
  @param image The pixel data to decode
  @return The contents of the image
  @throws NotFoundException Any errors which occurred