code: def save_image(self, outname):
          
          hdu = self.global_data.img.hdu
          hdu.data = self.global_data.img._pixels
          hdu.header["ORIGIN"] = "Aegean {0}-({1})".format(__version__, __date__)
          # delete some axes that we aren't going to need
          for c in ['CRPIX3', 'CRPIX4', 'CDELT3', 'CDELT4', 'CRVAL3', 'CRVAL4', 'CTYPE3', 'CTYPE4']:
              if c in hdu.header:
                  del hdu.header[c]
          hdu.writeto(outname, overwrite=True)
          self.log.info("Wrote {0}".format(outname))
          return
docs: Save the image data.
          This is probably only useful if the image data has been blanked.
  
          Parameters
          ----------
          outname : str
              Name for the output file.