# Method Image.ANY.decode_header()

Method decode_header

  ``mapping` decode_header(`string` `data`)`

Description

  Tries heuristics to find the correct method of decoding the header, then calls that method.

  The resulting mapping depends on wich decode_header method that is executed, but these keys will probably exist

  ``"xsize"` : `int`` | Size of image
  ``"ysize"` : `int``
  ``"type"` : `string`` | File type information as MIME type.
  ``"color_space"` : `string`` | Color space of image.

Note

  Throws upon failure.