Digital watermarking is the act of hiding a message related to a digital signal (i.e. an. image, song, video) within the signal itseclosely related to lf. It is a concept. steganography, in that they both hide a message inside a digital signal. However, what. separates them is their goal.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  extrude(Verb) To push or thrust out. 2  extrude(Verb) To form or shape (a metal, plastic etc.) by forcing it through a die or an opening.
Top 10 facts about the world. Extrusion, from the Latin past participle extrudere meaning âto thrust out,â refers both to the process in which material is forced through a die or series of dies in order to shape it as well as to the product of that operation. The process is used in the home and in manufacturing.