Comparison of Various Data Hiding Techniques With Adaptive Pixel Pair Matching

Abstract

Data hiding is a technique that conceals data into a carrier for conveying secret messages confidentially. This paper proposes a new data-hiding method based on pixel pair matching (PPM). The basic idea of PPM is to use the values of pixel pair as a reference coordinate, and search a coordinate in the neighbourhood set of this pixel pair according to a given message digit. The pixel pair is then replaced by the searched coordinate to conceal the digit. The LSB and OPAP methods employ one pixel as an embedding unit, and conceal data into the right-most r LSBs. Another group of data-hiding methods employs two pixels as an embedding unit to conceal a message digit s_B in a B-ary notational system. We term these data-hiding methods as pixel pair matching (PPM). In DE method the payload is depends upon a parameter ‘K'. The proposed method concealing digits in any notational system, but also provides the same or even smaller embedding distortion than DE for various payloads. The experimental result shows the ability of Adaptive pixel pair matching technique over the conventional techniques in terms of image quality by providing a lower MSE value.