A SEMINAR ON DIGITAL WATERMARKING PRESENTED BY: VIDHI AGARWAL CS FINAL YR. CSE/1754
TABLE OF CONTENTS
Introduction to DW
Process of DW
Types of DW
Application of DW
Limitations of DW
INTRODUCTION TO DW
Digital watermarking is the process of embedding information into a digital signal.
The purpose of digital watermarking is to provide copyright protection.
The process of secretly embedding inside a data source without changing its perceptual quality.
DW and steganography are the implementations of information hiding.
CONTINUED….. Extraction function M ( L ) Channel Retrieved information M ( L ) Information to embed Embedding function ^
PROCESS OF DW Fig. Watermark embedding
CONTINUED…. Fig. Watermark detection
DETECTIONS OF WATERMARK Fig . Using digital watermarks for integrity verification: the protected image is the image (a) above; a modified image is obtained by swapping the numbers 9 and 4 of the number plate (b); digital watermarking technology allows detecting and highlights the modified areas, as shown on (c).
TYPES OF DW Fig. Types of watermarking
In visible watermarking, the information is visible in the picture or video.