![[Digital Watermarking 01 & 02] Applications and Properties of Watermarking](https://static.fdocuments.net/doc/165x107/577d34c41a28ab3a6b8ecca2/digital-watermarking-01-02-applications-and-properties-of-watermarking.jpg)
[Digital Watermarking 01 & 02] Applications and Properties of Watermarking
6816148 Watermarking
33
INFORMATION HIDING TECHNIQUES In this section, we briefly discuss the historical development of watermarking. We also introduce various data hiding terminologies used in current literature and attempt has clear distinction of them. 1.1 HISTORY OF INFORMATION HIDING The idea of communicating secretly is as old as communication it self . The ea rl iest al lusi on to secret wr it ing in the We st appears in Homer’s Iliad .Steganographic methods made their record debut a few centuries later in several tales by Herodotus, the father of history. An important technique was the use of sympathetic inks.. Later, chemically affected sympathetic inks were developed. This was used in World Wars 1 and 2. The origin of steganography is biological and physiological. The te rm st eganogr aph y came into use in 1500’s af te r the appe arance of Trit hemius ’ book on the subject Stegano graphi a. A whole other branch of steganography, linguistic steganography, consists of linguistic or language forms of hidden writing. These are the semagrams and the open code. A semagram is a secret message that is not in a written form. Watermarking technique has evolved from steganography. The use of wa te rmar ks is al most as ol d as pa pe r ma nufa ct ur ing. Pa pe r Watermarks have been in wide use since the late middle Ages. Their earliest use seems to have been to record the manufacturer’s trademark on the product so that the authenticity could be clearly established without degrading the aesthetics and utility of the stock.. Today most developed countries also watermark their paper, currencies and postage stamps to 1
-
Upload
venkatsrmv -
Category
Documents
-
view
222 -
download
0
Transcript of 6816148 Watermarking
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 1/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 2/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 3/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 4/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 5/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 6/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 7/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 8/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 9/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 10/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 11/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 12/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 13/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 14/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 15/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 16/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 17/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 18/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 19/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 20/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 21/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 22/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 23/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 24/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 25/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 26/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 27/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 28/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 29/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 30/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 31/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 32/33
8/3/2019 6816148 Watermarking
http://slidepdf.com/reader/full/6816148-watermarking 33/33
