J. Emmanuel Johnson, University of Valencia, Image Processing Laboratory (IPL), Valencia, Spain, Valero Laparra, University of Valencia, Valencia, Spain, Peer Johannes Nowack, University of Cambridge, Cambridge, United Kingdom, Jakob Runge, German Aerospace Center, Jena, Germany, Veronika Eyring, German Aerospace Center (DLR), Oberpfaffenhofen, Germany and Gustau Camps-Valls, Universitat de València, Image Processing Laboratory (IPL), Burjassot, Spain