Left picture: original Viking photograph, Viking 1, 1976 (see: Image:Martian_face_viking.jpg). Right image: picture after Median filtering.
"Face on Mars" in Cydonia-Region, processed by a Median Filter.
Author of composition: Anton (rp) 2005
Licensed under GNU-FDL
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license".
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