Entropy: A New Parameter for Image Deciphering

Abstract

Data and information, these two terms may look quite similar and also sometimes used with the same meaning. But in-depth, these terms are completely different from each other. This paper mainly focuses on this difference to extract the encrypted information from the data (importantly image data). Here, every aspect of the study and the way of formulation are explained using “Einstein’s theory of relativity” and “Arrow of time” for better understanding. Einstein’s theory is used to explain “how similar things can be seen in different ways?” (here data and information) and arrow of time is used to explain “how the correct information can be extracted from the data?”. To explain this concept, an image encrypted using a chaotic logistic map is used. The edge information present in this data is taken as the parameter to differentiate the unorganized data and organized data (correct information). Here, a new parameter called “Randomness parameter (Rp)” is introduced, which gives the entropy (randomness) of the data. The outcome of this parameter is used to differentiate the data and correct information.