Performance Analysis of Spatial Domain Image Steganography

Steganography is a technique used to hide data or message which is in any format including normal text or a media file like image, video, audio, inside another similar interactive media file which ensures that the hidden message can’t be read by anyone using physical means. Here, a steganographic technique in the spatial domain is employed to conceal simple text within an image by modifying its pixel values. In general, the most convenient and efficient method is to change the pixel of the image which is done to embed the message in binary format. This process is done by modifying the pixel of the image from the LSB of the pixel thus got its name LSB Substitution. For simpler medical application-based data hiding, the message is more important than the distortion which could be possibly created in the image. Thus, our proposed method modifies more than one bit of the pixel, allowing for a larger amount of data to be embedded within a single image. Additionally, by greatly reducing the number of pixels changed, the proposed method employs edge detection techniques to improve the embedding capacity with a higher peak signal-to-noise ratio (PSNR) and overall system efficiency and convenience.