Data Hiding Using Reversibly Designed Difference-Pair Method

There is no question that data hiding has increasingly drawn extensive attention recently. This report presents a data hiding technique based on the modification of image histogram. It is fully reversible, that means, the original cover image can be recovered from the marked image, after the hidden data has been extracted. In this work, a data hiding scheme using reversibly designed difference-pair method is presented. In comparison to the previous work, since only one pixel of a pixel-pair was allowed to be modified by 1 bit in value, their embedding capacity was low. The embedding algorithm should have higher embedding capacity as this was the major drawback. Therefore it was decided to work on an algorithm which can increase embedding capacity in reversible domain. Results achieved after the execution of algorithms were compared with the existed work to draw result oriented conclusion.