Change of data from one domain to another is called transform. The most popular variants of transform normally transform a particular signal from time domain to frequency domain or vice versa. The signal in discussion may be of any form, i.e., speech, audio, image, video, etc. Fourier Transform is one of the most popular transform that converts a time domain signal to frequency domain and its inverse transform works the other way round converting frequency to time. Other than this there are many more such transforms starting from wavelt transform, Z-transform, Laplace transform, Wavelet transform,etc.
Published in Chapter:
Watermarking of Data Using Biometrics
Swanirbhar Majumder (Deemed University, India) and Tirtha Sankar Das (RCC Institute of Information Technology, India)
Copyright: © 2013
|Pages: 26
DOI: 10.4018/978-1-4666-2518-1.ch024
Abstract
These days, for the copyright protection and security of multimedia data in this age of the tech-savvy world, watermarking is a very important technique. Moreover, with the inclusion of biometrics for the watermarking schemes, the concept of “something you are” is included in the watermark and/or cover image. This thereby increases the security intensity in the multimedia data. And to give a glimpse of the technique the concepts of Watermarking, biometric and watermarking using biometrics is discussed. Finally, a particular case of real time watermarking of data using biometric is discussed by specifying a practical example.