Embedding and extracting two separate images signal in salt & pepper noises in digital images based on watermarking

By the increasing exchange of information around the world and the use of computer networks, such as the Internet, having a secure environment for transmission is necessary. Watermarking means hiding the data, known as water marker in digital media, in which the information can be extracted and processed in a safe manner. Watermarking in the spatial domain is done at most in three Least Significant Bits (LSB) of an image. In this paper, we introduce a method for watermarking the two separate digital signals in six bits of applied salt & pepper noises to a digital image; since the salt & pepper noises are placed randomly throughout the image, the pixels' information of the two separate images can be replaced into the salt & pepper noises peer to peer, and then this embedded information in noises is extracted in other applications, and noises from these three images will be removed.