Analysis of digital image data hiding techniques

The technique which is used to conceal private image into a cover image is called data hiding techniques. Different techniques have been discovered for data hiding with its limitations and merits. Data hiding can be done in any form of information such as video, audio, text, and image. Based on the application type many techniques are used. One of the problems with sending data over networks is security. Protecting information during transfer of data is important. Data hiding provides security and authentication. Data hiding will not recover the original image whereas, Reversible Data Hiding restores the original cover image. Data hiding techniques are used for different approaches such as the robustness of the hiding process in a digital image, digital image security, and imperceptibility of the digital image. Data hiding techniques fulfill maximum requirements such as security, undetectability, imperceptibility, robustness etc which can be used in various applications.