In order to improve the capacity of the hidden secret data and to provide an imperceptible stego-image quality, a novel steganographic method based on least-significant-bit (LSB) replacement and pixel-value differencing (PVD) method is presented in this paper. First, we obtain a different value from two consecutive pixels by utilizing the PVD method. A small difference value can be located on a smooth area and the large one is located on an edged area. In the smooth areas, we hid the secret data into the cover image by LSB method while using the PVD method in the edged areas. Because the range width is variable, and the area in which the secret data is concealed by LSB or PVD method are hard to guess, the security level is the same as that of a single using the PVD method of the proposed method. From the experimental results, compared with the PVD method being used alone, the proposed method can hide a much larger information and maintains a good visual quality of stego-image.
Wu et al. proposed an approach based on the least-significant-bit (LSB) replacement and the pixelvalue differencing (PVD) method REF .
Image steganographic scheme based on pixel-value differencing and LSB replacement methods
IEE Proceedings - Vision, Image, and Signal Processing
IEE Proceedings - Vision, Image, and Signal Processing
Mathematics