n.

a line marking the level reached by a body of water

同義詞：water line

a distinguishing mark impressed on paper during manufacture; visible when paper is held up to the light

Watermarked business cards and methods
Attack operators for digitally watermarked images
Linux Kernel Development, 2nd Edition
Strategic Risk Taking: A Framework for Risk Management (paperback)
Watermarking of uncompressed and compressed video
Perceptual watermarks for digital images and video
The use of watermarks in the protection of digital multimedia products
Robust image watermarking in spatial domain
A fair benchmark for image watermarking systems
A statistical watermark detection technique without using original images for resolving rightful ownerships of digital images