University of Houston
Department of Computer Science

In partial fulfillment of the Requirements for the Degree of
Master of Science


Qi Yang
will defend her thesis


Time-Variant Watermarks in Color Digital Video



Abstract

Digitization and the Internet have a significant impact on copyright issues, creating an increased need for intellectual property protection for digital media. Digital watermarking is one of the technologies of copyright protection for digital media; it is a technique that embeds a visible or invisible signal that may include owner identification and copy control information into digital media such as audio, video, and still images to help identifying copyright violations.

In this research, a time-variant watermarking algorithm for color digital video is proposed. First, time-invariant watermarking algorithms of I-pictures and P-pictures of color video sequences are investigated, and then the algorithm is extended to a time-variant watermarking algorithm for I-pictures of color video. Time-variant watermarks are more robust and more difficult to be detected and removed. Experimental results show that this watermarking algorithm is invisible.

Date: Thursday, December 6, 2001
Time: 2:00 PM
Place: 550-PGH



Faculty, students, and the general public are invited.
Thesis Advisor: Dr. Ernst Leiss