Introduction
Data hiding is a process of concealing the presence of some secret message in a host media. Data hiding process involves embedding data into a host medium. It can be used to embed some additional information, such as ownership information for digital media, and copyright information. In this paper, the context-based DH (Data Hiding) method will be discussed, which is a way to embed secret information into digital multimedia data.
Context-based DH
Context-based DH is a data hiding method which exploits the context-sensitivity in images and videos. It is a method which is used to embed secret information into a host data by exploiting the contextual relationships of the pixels in an image or video frames. Contextual information is a simple and effective way to embed information into a host data. Context-based DH was proposed by Moffat and Pun (1995). The context-based DH involves a three-step process: embedding the message into the host image; extracting the message; and decoding the message to recover the secret text.
Embedding the message
In the first step, the message is embedded into the host image by modifying the context of the pixels in the image. In this step, the message is embedded into the context of the host data using some special techniques. For example, variations in color, intensity, texture, and other features of the image can be used to embed the message. The message is embedded into the context of the pixels in the image by modifying the context of the pixels in order to add information to the image.
Extracting the message
In the second step, the embedded message is extracted from the host image. The embedded message is extracted by analyzing the context of the host image. This is done by comparing the context of the pixels in the image with the context of the pixels in the original host data. If the context of the pixels in the image match the context of the pixels in the original host data, then it is assumed that the message is present in the host data.
Decoding the message
In the third step, the embedded message is decoded and the secret text is recovered. The embedded message is decoded by applying a decoding algorithm. The decoding algorithm is used to recover the secret text from the embedded message. The decoding algorithm is an algorithm which is used to recover the original text from the embedded secret message.
Conclusion
In conclusion, the context-based data hiding method is a way to embed secret information into a digital multimedia data. This method is based on exploiting the context-sensitivity of the pixels in the images and videos. The context-based data hiding method involves a three-step process: embedding the message into the host image; extracting the message; and decoding the message to recover the secret text. The context-based DH method can be used to hide information in digital images, videos, and other digital media.