Digital image watermark

A Coded Aperture for Watermark Extraction from Defocused Images

© 2019, Springer Nature Switzerland AG. Barcodes and 2D codes are widely used for various purposes, such as electronic payments and …

H. Hamasaki, S. Takeshita, K. Nakai, T. Sonoda, H. Kawasaki, H. Nagahara, S. Ono