Survey on Reversible Watermarking Techniques of Echocardiography

Table 1

Different types of watermarking.

Watermarking type	Characteristics
Fragile	The fragile methods are mostly used in application where content authentication is desired. Detection of forgeries/tempers, unauthorized processing, and transmission is carried out using fragile methods of watermarking.
Semifragile	Application which has privacy constraints along with content authentication uses semifragile methods.
Robust	The method of watermarking is used in situation where protection of copyright and digital rights management is desired. These kinds of watermarks survive malicious/nonmalicious attacks on the marked media.