Data Hiding Based on Spatial Domain Concept(R, G, B Planes & Gray images)

Data hiding is the technique of embedding data in an image and retrieval of the data with lossless reconstruction of original im age. In this paper, we present data hiding scheme based on histogram modification.This technique is based on differences of adjacent pixels for embedding data and has more hiding capacity compared to existing methods.We exploit a binary tree structure to solve the problem of communicating pairs of peak points. Here, a histogram shifting technique is applied in order to prevent overflow and underflow problems of the pixels. Color image is divided into three planes i.e., r, g, b. In each plane data is embedded. Large amount of data is embed ded by using this type of algorithm. The performance of the algorithm has been evaluated with hiding capacity (data bits) and peak signal to noise ratio (db) of the reconstruction as the parameters. Index Terms — Data hiding, Histogram modification, Histogram shifting, Individual components of r, g,b planes, Image authentication, lossless watermarking, lossless reconstruction. ——————————  ——————————