Reversible Data Hiding for High-Quality Images Based on Integer Wavelet Transform

This article presents a simple reversible data hiding scheme based on the integer wavelet transform (IWT). By adjusting the coefficient values, data bits are effectively embedded into the low-high (LH) and high-low (HL) subbands of the IWT domain. Simulations show that both the host media and secret message can be completely recovered, without distortion, if the stego-images remain intact. Moreover, the resulting perceived quality of the image is highly satisfactory, as is the hiding capacity. In addition, the resulting Peak Signal-to-Noise Ratio (PSNR) of the proposed method is better than that of existing techniques. Furthermore, the stego-images generated by the proposed method have a certain degree of robustness which is resistant to image processing operations.