Comparing PSNR by using Integer and Haar Wavelet Transform in Reversible Data Hiding Technique

Abstract

A novel approach to recover data and cover image was introduced here by using reserve room concept of encryption. Here, data can be extracted without any loss, since reserve room concept of encryption is being used. In the previous methods, data are encrypted and are then being stored. But, in this method, data are stored in a particular place before the process of encryption. This helps in preventing the loss of data occurring in the system. Usually, transformation is a compression technique, takes place in the image to improve its quality. Integer wavelet transform and Haar transform are used here to improve the quality of the image. Comparison of integer wavelet transform and Haar transformation takes place and the PSNR achieved by Haar transform is greater than the PSNR achieved by integer wavelet transform. The mean square error also gets decreases in Haar transformation when compares with the integer wavelet transformation. Experimental results show that this method can embed large amount of data comparing to the previous methods.