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

Multimedia watermarking techniques
Image-adaptive watermarking using visual models
Secure spread spectrum watermarking for multimedia
Improved wavelet-based watermarking through pixel-wise masking
Multimedia data-embedding and watermarking technologies
A DCT-domain system for robust image watermarking
Rotation, scale and translation invariant spread spectrum digital image watermarking 1
Quantization index modulation: a class of provably good methods for digital watermarking and information embedding
Quantization index modulation: a class of provably good methods for digital watermarking and information embedding
Wornell, G.W.: Quantization Index Modulation: A Class of Provably Good Methods for Digital Watermarking and Information Embedding. I...