n.
a line marking the level reached by a body of water
同义词：water line
a distinguishing mark impressed on paper during manufacture; visible when paper is held up to the light
Digital Watermarks for Audio Signals
Digital Watermarks for Audio Signals
Digital watermarks for audio signals
Hidden digital watermarks in images
Hidden digital watermarks in images
Hidden digital watermarks in images
Perceptual watermarks for digital images and video
Perceptual watermarks for digital images and video
The use of watermarks in the protection of digital multimedia products
Robust template matching for affine resistant image watermarks.
