color image digital watermark

adjustable voltage controlabbreviated digital verification color code

image watermark algorithm

Image Watermark

holographic watermark

gray–scale watermark

gray-scale watermark

Gray-level watermark

fragile watermark

fractal watermark

E-watermark

Erasable watermark

emulating watermark

dynamic graph watermark

Dual Watermark

discriminating watermark

Database Watermark

D igital watermark

confirmable watermark