Text based geometric normalization for robust watermarking of digital maps. - Mauro Barni; Franco Bartolini; Vito Cappellini; Alessandro Piva; Filippo Salucco (ICIP (1), 2001)

Cartographic image watermarking using text-based normalization. - Mauro Barni; Franco Bartolini; Alessandro Piva; Filippo Salucco (MMSP, 2001)

Robust Watermarking of Cartographic Images. - Mauro Barni; Franco Bartolini; Alessandro Piva; Filippo Salucco (EURASIP J. Adv. Signal Process., 2002)