IntroductionChristine Buisson, Winnie Daamen and Serge HoogendoorData collection techniquesJean-Mic hel Auberlet, Ashish Bhaskar, Biagio Ciuffo and Axel LeonhardData processing and enhancement techniquesCostas Antoniou, Jaime Barcelo, Christine Buisson, SergeHoogendoorn, Thomas …